Nano-carbon reinforced aluminum matrix composites for conductor and preparation method

Abstract

A carbon nano reinforced aluminum matrix conductive composite and a preparation method thereof are provided. In the preparation method, nano silicon dioxide chemically grows on the surface of graphene oxide, reduced graphene oxide@silicon dioxide carbon nano powder is prepared and reduced in the process of high-temperature sintering, and the mixed powder is blown into a melt using an inert gas, and then stirred, purified and cast.

Claims

1. A carbon nano reinforced aluminum matrix conductive composite, consisting of the following alloy components in percentage by mass: 0.01˜0.07% of graphene, 0.1˜0.6% of Zr, ≤0.08% of Fe, ≤0.04% of Si, other elements≤0.01% each, and the balance of Al, wherein the other elements include Ti and impurities.

2. A preparation method of the carbon nano reinforced aluminum matrix conductive composite according to claim 1, comprising the following steps: (1) putting an aluminum ingot into a resistance furnace when a temperature of a resistance furnace is raised to 400° C.; (2) heating the aluminum ingot until said ingot is completely molten, raising the temperature to 710-730° C. and adding Al-5Zr intermediate alloy, and carrying out heat preservation to form an aluminum melt; (3) blowing reduced graphene oxide@silicon dioxide composite powder into the aluminum melt using argon while stirring, until the reduced graphene oxide@silicon dioxide composite powder is completely blown; (4) blowing a 6AB refining agent from Pyrotek company using argon, wherein a mass of the added refining agent is 1.2% that of the aluminum melt; (5) standing and carrying out heat preservation for 5 min, then adding Al-5% Ti—B wires, slagging, discharging, and carrying out water-cold semicontinuous casting to obtain a cast ingot; (6) cutting off a head and tail of the cast ingot, turning surface scales, and then carrying out extrusion deformation; and (7) using high-temperature solution and aging treatment to obtain the carbon nano reinforced aluminum matrix conductive composite.

3. The preparation method according to claim 2, wherein a preparation method of reduced graphene oxide@silicon dioxide composite powder in the step (3) is as follows: KH-550 silane coupling agent solution is prepared, a ratio of ethanol to water is 1˜10:4˜16, a content of KH-550 in the solution is 0.1 vol. %˜1.5 vol. %, and hydrolysis is carried out for 2-6 h under a condition of standing; graphene oxide is added in the solution so that a concentration of graphene is 0.2˜1.0 g/L, then silicon dioxide powder is added to undergo ultrasonic treatment for 60˜120 min, a particle size of the silicon dioxide powder is 10 nm˜50 nm, the solution is subjected to vacuum freeze drying, and then graphene oxide is subjected to reductive sintering for 1-5 h at a sintering temperature of 1200° C.˜1500° C., so as to obtain the reduced graphene oxide@silicon dioxide composite powder.

4. The preparation method according to claim 3, wherein in the step (3), the graphene oxide is 1-5 layers of graphene oxide, and has a particle size of 5˜20 microns.

5. The preparation method according to claim 3, wherein in the reduced graphene oxide@silicon dioxide composite powder, a mass of silicon dioxide is 0.5˜5%.

6. The preparation method according to claim 2, wherein in the step (6), a extrusion heating temperature is 400˜450° C., heat preservation time is 3˜5 h, an extrusion ratio is 20˜30:1, and an extrusion rate is 2.0˜5.0 mm/min.

7. The preparation method according to claim 2, wherein in the step (7), a solution temperature is 570-610° C. with a heat preservation time of 2-6 h; and an aging temperature is 250-350° C. with a heat preservation time of 24-72 h.

Description

DESCRIPTION OF THE EMBODIMENTS

(1) Next, examples of the disclosure will be described in detail. These examples are implemented on the premise of the technical solution of the disclosure, detailed embodiments and specific operation processes are given, but the protective scope of the disclosure is not limited to the following examples.

Example 1

(2) Components of alloy: 0.07% of graphene, 0.30% of Zr, 0.008% of Fe, 0.038% of Si, 0.010% of Ti and the balance of Al. A preparation process of reduced graphene oxide @silicon dioxide and ratios were as follows: KH-550 silane coupling agent solution was prepared, a ratio of ethanol to water was 1:14, the content of KH-550 in the solution was 1.5 vol. %, and hydrolysis was carried out for 6 h under the condition of standing; graphene oxide having no more than 5 layers and an average particle size of 5 microns was added in the solution so that the concentration of graphene was 1.0 g/L, then silicon dioxide powder was added to undergo ultrasonic treatment for 100 min, the particle size of the nano silicon dioxide powder was 10 nm, the addition amount of nano silicon dioxide was 1.0% mass of graphene, the solution was subjected to vacuum freeze drying, and then graphene oxide was subjected to reductive sintering for 2 h at a sintering temperature of 1500° C., so as to obtain reduced graphene oxide@silicon dioxide composite powder. A furnace was cleaned before blowing in. Like production of alloy except series 1 alloy, it was needed to clean the furnace to reach the purpose of controlling the contents of impurity elements. When a resistance furnace was heated to 400° C., an aluminum ingot was put in the resistance furnace by a crane; the purity of the aluminum ingot was 99.85%, the aluminum melt was heated to 730° C. after the aluminum ingot was completely molten, and Al-5% Zr intermediate alloy was added. The reduced graphene oxide@silicon dioxide powder was blown into the aluminum melt using argon, the melt was sufficiently stirred using a stirring tool until the reduced graphene oxide@silicon dioxide powder was completely blown. A 6AB refining agent from Pyrotek company was blown using argon, the mass of the added refining agent was 1.0% that of the aluminum melt; Al-5% Ti—B wires were added after standing and carrying out heat preservation for 5 min, slagging was carried out, discharging was carried out at 720° C., and water-cold semicontinuous casting was carried out to obtain a cast ingot; the finished cast ingot product was hoisted out of a crystallizer, the head and tail of the cast ingot were cut off, and the surface scales were turned and then extruded and deformed; extrusion heating temperature was 400° C., heat preservation time was 5 h, an extrusion ratio was 25:1, and an extrusion rate was 3.0 mm/min; after extrusion, the solution temperature of a sectional material was 570° C., and heat preservation time was 6 h; the aging temperature was 300° C., and heat preservation time was 60 h.

Example 2

(3) Components of alloy: 0.01% of graphene, 0.1% of Zr, 0.010% of Ti, 0.071% of Fe, 0.035% of Si, ≤0.01% of each of rest elements and the balance of Al. A preparation process and for synthesizing reduced graphene oxide@silicon dioxide in advance and ratios were as follows: KH-550 silane coupling agent solution was prepared, a ratio of ethanol to water was 10:4, the content of KH-550 in the solution was 1.2 vol. %, and hydrolysis was carried out for 6 h under the condition of standing; graphene oxide having no more than 3 layers and an average particle size of 20 microns was added in the solution so that the concentration of graphene was 1.0 g/L, then silicon dioxide powder was added to undergo ultrasonic treatment for 120 min, the particle size of the nano silicon dioxide powder was 50 nm, the addition amount of nano silicon dioxide was 5% mass of graphene, the solution was subjected to vacuum freeze drying, and then graphene oxide was subjected to reductive sintering for 2 h at a sintering temperature of 1500° C., so as to obtain reduced graphene oxide@silicon dioxide composite powder. A furnace was cleaned before blowing in. Like production of alloy except series 1 alloy, it was needed to clean the furnace to reach the purpose of controlling the contents of impurity elements. When a resistance furnace was heated to 400° C., an aluminum ingot was put in the resistance furnace by a crane; the aluminum melt was heated to 740° C. after the aluminum ingot was completely molten, and Al-5% Zr intermediate alloy was added. The reduced graphene oxide@silicon dioxide powder was blown into the aluminum melt using argon, the melt was sufficiently stirred using a stirring tool until the reduced graphene oxide@silicon dioxide powder was completely blown. A 6AB refining agent from Pyrotek company was blown using argon, the mass of the added refining agent was 1.0% that of the aluminum melt; Al-5% Ti—B wires were added after standing and carrying out heat preservation for 5 min, slagging was carried out, discharging was carried out at 720° C., and water-cold semicontinuous casting was carried out to obtain a cast ingot; the finished cast ingot product was hoisted out of a crystallizer, the head and tail of the cast ingot were cut off, and the surface scales were turned and then extruded and deformed; extrusion heating temperature was 400° C., heat preservation time was 3 h, an extrusion ratio was 25:1, and an extrusion rate was 2.0 mm/min; after extrusion, the solution temperature of a sectional material was 610° C., and heat preservation time was 4 h; the aging temperature was 350° C., and heat preservation time was 24 h.

Example 3

(4) Components of alloy: 0.05% of graphene, 0.15% of Zr, 0.010% of Ti, 0.069% of Fe, 0.034% of Si, ≤0.01% of each of rest elements and the balance of Al. A preparation process for synthesizing reduced graphene oxide@silicon dioxide in advance and ratios were as follows: KH-550 silane coupling agent solution was prepared, a ratio of ethanol to water was 3:9, the content of KH-550 in the solution was 1.0 vol. %, and hydrolysis was carried out for 4 h under the condition of standing; graphene oxide having no more than 3 layers and an average particle size of 15 microns was added in the solution so that the concentration of graphene was 0.8 g/L, then silicon dioxide powder was added to undergo ultrasonic treatment for 60 min, the particle size of the nano silicon dioxide powder was 10 nm, the addition amount of nano silicon dioxide was 5% mass of graphene, the solution was subjected to vacuum freeze drying, and then graphene oxide was subjected to reductive sintering for 4 h at a sintering temperature of 1200° C., so as to obtain reduced graphene oxide@silicon dioxide composite powder. A furnace was cleaned before blowing in. Like production of alloy except series 1 alloy, it was needed to clean the furnace to reach the purpose of controlling the contents of impurity elements. When a resistance furnace was heated to 400° C., 99.86% of aluminum ingot was put in the resistance furnace by a crane; the aluminum melt was heated to 730° C. after the aluminum ingot was completely molten, and Al-5% Zr intermediate alloy was added. The reduced graphene oxide@silicon dioxide powder was blown into the aluminum melt using argon, the melt was sufficiently stirred using a stirring tool until the reduced graphene oxide@silicon dioxide powder was completely blown. A 6AB refining agent from Pyrotek company was blown using argon, the mass of the added refining agent was 1.0% that of the aluminum melt; Al-5% Ti—B wires were added after standing and carrying out heat preservation for 5 min, slagging was carried out, discharging was carried out at 720° C., and water-cold semicontinuous casting was carried out to obtain a cast ingot; the finished cast ingot product was hoisted out of a crystallizer, the head and tail of the cast ingot were cut off, and the surface scales were turned and then extruded and deformed; extrusion heating temperature was 450° C., heat preservation time was 4 h, an extrusion ratio was 30:1, and an extrusion rate was 2.0 mm/min; after extrusion, the solution temperature of a sectional material was 600° C., and heat preservation time was 5 h; the aging temperature was 350° C., and heat preservation time was 60 h.

Example 4

(5) Components of alloy: 0.07% of graphene, 0.2% of Zr, 0.071% of Fe, 0.034% of Si, 0.010% of Ti, and the balance of Al. A preparation process of reduced graphene oxide @silicon dioxide and ratios were as follows: KH-550 silane coupling agent solution was prepared, a ratio of ethanol to water was 2:14, the content of KH-550 in the solution was 1.2 vol. %, and hydrolysis was carried out for 5 h under the condition of standing; graphene oxide having no more than 3 layers and an average particle size of 1 microns was added in the solution so that the concentration of graphene was 1.0 g/L, then silicon dioxide powder was added to undergo ultrasonic treatment for 60 min, the particle size of the nano silicon dioxide powder was 25 nm, the addition amount of nano silicon dioxide was 0.5% mass of graphene, the solution was subjected to vacuum freeze drying, and then graphene oxide was subjected to reductive sintering for 3 h at a sintering temperature of 1350° C., so as to obtain reduced graphene oxide@silicon dioxide composite powder. A furnace was cleaned before blowing in. Like production of alloy except series 1 alloy, it was needed to clean the furnace to reach the purpose of controlling the contents of impurity elements. When a resistance furnace was heated to 400° C., the aluminum ingot was put in the resistance furnace by a crane; the purity of the aluminum ingot was 99.85%, the aluminum melt was heated to 730° C. after the aluminum ingot was completely molten, and Al-5% Zr intermediate alloy was added. The reduced graphene oxide@silicon dioxide powder was blown into the aluminum melt using argon, the melt was sufficiently stirred using a stirring tool until the reduced graphene oxide@silicon dioxide powder was completely blown. A 6AB refining agent from Pyrotek company was blown using argon, the mass of the added refining agent was 1.0% that of the aluminum melt; Al-5% Ti—B wires were added after standing and carrying out heat preservation for 5 min, slagging was carried out, discharging was carried out at 720° C., and water-cold semicontinuous casting was carried out to obtain a cast ingot; the finished cast ingot product was hoisted out of a crystallizer, the head and tail of the cast ingot were cut off, and the surface scales were turned and then extruded and deformed; extrusion heating temperature was 420° C., heat preservation time was 3 h, an extrusion ratio was 20:1, and an extrusion rate was 2.0 mm/min; after extrusion, the solution temperature of a sectional material was 580° C., and heat preservation time was 5 h; the aging temperature was 350° C., and heat preservation time was 50 h.

Example 5

(6) Components of alloy: 0.02% of graphene, 0.2% of Zr, 0.075% of Fe, 0.039% of Si, 0.010% of Ti, and the balance of Al. A preparation process of reduced graphene oxide@silicon dioxide in advance and ratios were as follows: KH-550 silane coupling agent solution was prepared, a ratio of ethanol to water was 2:12, the content of KH-550 in the solution was 1.0 vol. %, and hydrolysis was carried out for 5 h under the condition of standing; graphene oxide having no more than 3 layers and an average particle size of 10 microns was added in the solution so that the concentration of graphene was 3.0 g/L, then silicon dioxide powder was added to undergo ultrasonic treatment for 60 min, wherein the particle size of the nano silicon dioxide powder was 10 nm, the addition amount of nano silicon dioxide was 2% mass of graphene, the solution was subjected to vacuum freeze drying, and then graphene oxide was subjected to reductive sintering for 6 h at a sintering temperature of 1000° C., so as to obtain reduced graphene oxide@silicon dioxide composite powder. A furnace was cleaned before blowing in. Like production of alloy except series 1 alloy, it was needed to clean the furnace to reach the purpose of controlling the contents of impurity elements. When a resistance furnace was heated to 400° C., the aluminum ingot was put in the resistance furnace by a crane; the purity of the aluminum ingot was 99.84%, the aluminum melt was heated to 730° C. after the aluminum ingot was completely molten, and Al-5% Zr intermediate alloy was added. The reduced graphene oxide@silicon dioxide powder was blown into the aluminum melt using argon, the melt was sufficiently stirred using a stirring tool until the reduced graphene oxide@silicon dioxide powder was completely blown. A 6AB refining agent from Pyrotek company was blown using argon, the mass of the added refining agent was 1.0% that of the aluminum melt; Al-5% Ti—B wires were added after standing and carrying out heat preservation for 5 min, slagging was carried out, discharging was carried out at 720° C., and water-cold semicontinuous casting was carried out to obtain a cast ingot; the finished cast ingot product was hoisted out of a crystallizer, the head and tail of the cast ingot were cut off, and the surface scales were turned and then extruded and deformed; extrusion heating temperature was 450° C., heat preservation time was 4 h, an extrusion ratio was 25:1, and an extrusion rate was 4.0 mm/min; after extrusion, the solution temperature of a sectional material was 580° C., and heat preservation time was 6 h; the aging temperature was 330° C., and heat preservation time was 48 h.

Example 6

(7) Components of alloy: 0.07% of graphene, 0.1% of Zr, 0.073% of Fe, 0.032% of Si, 0.010% of Ti, and the balance of Al. A preparation process of reduced graphene oxide@silicon dioxide and ratios were as follows: KH-550 silane coupling agent solution was prepared, a ratio of ethanol to water was 1:16, the content of KH-550 in the solution was 1.4 vol. %, and hydrolysis was carried out for 5 h under the condition of standing; graphene oxide having no more than 5 layers and an average particle size of 15 microns was added in the solution so that the concentration of graphene was 1.0 g/L, then silicon dioxide powder was added to undergo ultrasonic treatment for 80 min, wherein the particle size of the nano silicon dioxide powder was 10 nm, the addition amount of nano silicon dioxide was 1.5% mass of graphene, the solution was subjected to vacuum freeze drying, and then graphene oxide was subjected to reductive sintering for 6 h at a sintering temperature of 1000° C., so as to obtain reduced graphene oxide@silicon dioxide composite powder. A furnace was cleaned before blowing in. Like production of alloy except series 1 alloy, it was needed to clean the furnace to reach the purpose of controlling the contents of impurity elements. When a resistance furnace was heated to 400° C., the aluminum ingot was put in the resistance furnace by a crane; the purity of the aluminum ingot was 99.86%, the aluminum melt was heated to 740° C. after the aluminum ingot was completely molten, and Al-5% Zr intermediate alloy was added. The reduced graphene oxide@silicon dioxide powder was blown into the aluminum melt using argon, the melt was sufficiently stirred using a stirring tool until the reduced graphene oxide@silicon dioxide powder was completely blown. A 6AB refining agent from Pyrotek company was blown using argon, the mass of the added refining agent was 1.0% that of the aluminum melt; Al-5% Ti—B wires were added after standing and carrying out heat preservation for 5 min, slagging was carried out, discharging was carried out at 725° C., and water-cold semicontinuous casting was carried out to obtain a cast ingot; the finished cast ingot product was hoisted out of a crystallizer, the head and tail of the cast ingot were cut off, and the surface scales were turned and then extruded and deformed; extrusion heating temperature was 420° C., heat preservation time was 4 h, an extrusion ratio was 25:1, and an extrusion rate was 4.0 mm/min; after extrusion, the solution temperature of a sectional material was 580° C., and heat preservation time was 5 h; the aging temperature was 350° C., and heat preservation time was 48 h.

Comparative Example 1 (without Addition of Reduced Graphene Oxide@Silicon Dioxide and Zirconium)

(8) Components of alloy: 0.078% of Fe, 0.038% of Si, ≤0.01% of each of rest elements and the balance of Al. A furnace was cleaned before blowing in. Like production of alloy except series 1 alloy, it was needed to clean the furnace to reach the purpose of controlling the contents of impurity elements. When a resistance furnace was heated to 400° C., the aluminum ingot was put in the resistance furnace by a crane; the aluminum melt was heated to 740° C. after the aluminum ingot was completely molten. A 6AB refining agent from Pyrotek company was blown using argon, the mass of the added refining agent was 1.0% that of the aluminum melt; Al-5% Ti—B wires were added according to Ti content of 0.010% after standing and carrying out heat preservation for 5 min, slagging was carried out, discharging was carried out at 720° C. for casting, and water-cold semicontinuous casting was carried out to obtain a cast ingot; the finished cast ingot product was hoisted out of a crystallizer, the head and tail of the cast ingot were cut off, and the surface scales were turned and then extruded and deformed; extrusion heating temperature was 400° C., heat preservation time was 5 h, an extrusion ratio was 25:1, and an extrusion rate was 4.0 mm/min; after extrusion, the solution temperature of a sectional material was 580° C., and heat preservation time was 6 h; the aging temperature was 250° C., and heat preservation time was 48 h.

Comparative Example 2 (No Graphene Modification, Upward Floating of Graphene, Failed Addition, and Reduction in Material Performance)

(9) Components of alloy: 0.07% of graphene, 0.2% of Zr, 0.074% of Fe, 0.037% of Si, 0.010% of Ti and the balance of Al. A furnace was blown in. When a resistance furnace was heated to 400° C., the aluminum ingot was put in the resistance furnace by a crane; the aluminum melt was heated to 730° C. after the aluminum ingot was completely molten, and Al-5% Zr intermediate alloy was added. The reduced graphene oxide was blown into the aluminum melt using argon, the melt was sufficiently stirred using a stirring tool until the reduced graphene oxide was completely blown, it was found that graphene floated on the surface of the melt so addition was failed. A 6AB refining agent from Pyrotek company was blown using argon, the mass of the added refining agent was 1.0% that of the aluminum melt; Al-5% Ti—B wires were added after standing and carrying out heat preservation for 5 min, slagging was carried out, discharging was carried out at 750° C., and water-cold semicontinuous casting was carried out to obtain a cast ingot; the finished cast ingot product was hoisted out of a crystallizer, the head and tail of the cast ingot were cut off, and the surface scales were turned and then extruded and deformed; extrusion heating temperature was 400° C., heat preservation time was 5 h, an extrusion ratio was 25:1, and an extrusion rate was 4.0 mm/min; after extrusion, the solution temperature of a sectional material was 580° C., and heat preservation time was 6 h; the aging temperature was 250° C., and heat preservation time was 48 h.

Comparative Example 3 (without Addition of Reduced Graphene Oxide@Silicon Dioxide)

(10) Components of alloy: 0.3% of Zr, 0.072% of Fe, 0.035% of Si, ≤0.01% of each of rest elements and the balance of Al. A furnace was cleaned before blowing in. Like production of alloy except series 1 alloy, it was needed to clean the furnace to reach the purpose of controlling the contents of impurity elements. When a resistance furnace was heated to 400° C., the aluminum ingot was put in the resistance furnace by a crane; the aluminum melt was heated to 730° C. after the aluminum ingot was completely molten. A 6AB refining agent from Pyrotek company was blown using argon, the mass of the added refining agent was 1.0% that of the aluminum melt; Al-5% Ti—B wires were added according to Ti content of 0.010% after standing and carrying out heat preservation for 5 min, slagging was carried out, discharging was carried out at 720° C. for casting, and water-cold semicontinuous casting was carried out to obtain a cast ingot; the finished cast ingot product was hoisted out of a crystallizer, the head and tail of the cast ingot were cut off, and the surface scales were turned and then extruded and deformed; extrusion heating temperature was 400° C., heat preservation time was 5 h, an extrusion ratio was 30:1, and an extrusion rate was 4.0 mm/min; after extrusion, the solution temperature of a sectional material was 600° C., and heat preservation time was 4 h; the aging temperature was 300° C., and heat preservation time was 48 h.

Comparative Example 4 (without Addition of Zr Element)

(11) Components of alloy: 0.07% of graphene, 0.067% of Fe, 0.032% of Si, 0.010% of Ti and the balance of Al. A preparation process of reduced graphene oxide@silicon dioxide and ratios were as follows: KH-550 silane coupling agent solution was prepared, a ratio of ethanol to water was 0.5:14, the content of KH-550 in the solution was 1.2 vol. %, and hydrolysis was carried out for 2 h under the condition of standing; graphene oxide having no more than 5 layers and an average particle size of 10 microns was added in the solution so that the concentration of graphene was 2.0 g/L, then silicon dioxide powder was added to undergo ultrasonic treatment for 60 min, the particle size of the nano silicon dioxide powder was 40 nm, the addition amount of nano silicon dioxide was 2% mass of graphene, the solution was subjected to vacuum freeze drying, and then graphene oxide was subjected to reductive sintering for 6 h at a sintering temperature of 1000° C., so as to obtain reduced graphene oxide@silicon dioxide composite powder. A furnace was cleaned before blowing in. Like production of alloy except series 1 alloy, it was needed to clean the furnace to reach the purpose of controlling the contents of impurity elements. When a resistance furnace was heated to 400° C., the aluminum ingot was put in the resistance furnace by a crane; the aluminum melt was heated to 730° C. after the aluminum ingot was completely molten. The reduced graphene oxide@silicon dioxide powder was blown into the aluminum melt using argon, the melt was sufficiently stirred using a stirring tool until the reduced graphene oxide@silicon dioxide powder was completely blown. A 6AB refining agent from Pyrotek company was blown using argon, the mass of the added refining agent was 1.0% that of the aluminum melt; Al-5% Ti—B wires were added according to Ti content of 0.012% after standing and carrying out heat preservation for 5 min, slagging was carried out, discharging was carried out at 720° C. for casting, and water-cold semicontinuous casting was carried out to obtain a cast ingot; the finished cast ingot product was hoisted out of a crystallizer, the head and tail of the cast ingot were cut off, and the surface scales were turned and then extruded and deformed; extrusion heating temperature was 400° C., heat preservation time was 5 h, an extrusion ratio was 30:1, and an extrusion rate was 4.0 mm/min; after extrusion, the solution temperature of a sectional material was 600° C., and heat preservation time was 4 h; the aging temperature was 300° C., and heat preservation time was 48 h.

Comparative Example 5 (Solution Temperature and Aging Temperature were Reduced)

(12) Components of alloy: 0.07% of graphene, 0.3% of Zr, 0.067% of Fe, 0.032% of Si, 0.010% of Ti and the balance of Al. A preparation process of reduced graphene oxide@silicon dioxide and ratios were as follows: KH-550 silane coupling agent solution was prepared, a ratio of ethanol to water was 0.5:14, the content of KH-550 in the solution was 1.2 vol. %, and hydrolysis was carried out for 2 h under the condition of standing; graphene oxide having no more than 3 layers and an average particle size of 20 microns were added in the solution so that the concentration of graphene was 3.0 g/L, then silicon dioxide powder was added to undergo ultrasonic treatment for 60 min, the particle size of the nano silicon dioxide powder was 30 nm, the addition amount of nano silicon dioxide was 2% mass of graphene, the solution was subjected to vacuum freeze drying, and then graphene oxide was subjected to reductive sintering for 6 h at a sintering temperature of 1000° C., so as to obtain reduced graphene oxide@silicon dioxide composite powder. A furnace was cleaned before blowing in. Like production of alloy except series 1 alloy, it was needed to clean the furnace to reach the purpose of controlling the contents of impurity elements. When a resistance furnace was heated to 400° C., the aluminum ingot was put in the resistance furnace by a crane; the aluminum melt was heated to 730° C. after the aluminum ingot was completely molten, and Al-5% Zr intermediate alloy was added. The reduced graphene oxide@silicon dioxide powder was blown into the aluminum melt using argon, the melt was sufficiently stirred using a stirring tool until the reduced graphene oxide@silicon dioxide powder was completely blown. A 6AB refining agent from Pyrotek company was blown using argon, the mass of the added refining agent was 1.0% that of the aluminum melt; Al-5% Ti—B wires were added after standing and carrying out heat preservation for 5 min, slagging was carried out, discharging was carried out at 720° C., and water-cold semicontinuous casting was carried out to obtain a cast ingot; the finished cast ingot product was hoisted out of a crystallizer, the head and tail of the cast ingot were cut off, and the surface scales were turned and then extruded and deformed; extrusion heating temperature was 300° C., heat preservation time was 5 h, an extrusion ratio was 15:1, and an extrusion rate was 4.0 mm/min; after extrusion, the solution temperature of a sectional material was 400° C., and heat preservation time was 6 h; the aging temperature was 180° C., and heat preservation time was 60 h.

(13) TABLE-US-00001 Tensile Tensile strength Conductivity strength Conductivity (MPa) (% IACS) (MPa) (% IACS) Tensile 180°C/400 h 180° C./400 h 230° C./1 h 230° C./1 h strength Conductivity heat heat heat heat Number (MPa) (% IACS) preservation preservation preservation preservation Example 1 163 61.2 154 59.7 157 59.4 Example 2 161 61.4 155 59.1 159 59.0 Example 3 176 61.3 159 59.2 167 59.1 Example 4 181 61.2 165 59.6 170 59.5 Example 5 180 61.1 168 59.2 171 59.1 Example 6 173 61.3 148 59.3 149 59.2 Comparative 115 61.4 75 58.8 64 58.4 example 1 Comparative 87 57.2 58 55.3 62 55.8 example 2 Comparative 142 61.3 121 59.1 125 58.7 example 3 Comparative 148 61.2 128 58.7 132 58.5 example 4 Comparative 143 58.5 115 57.2 120 57.0 example 5

(14) Obviously, those skilled in the art can make various variations and transformations to the disclosure without departing from the spirit and scope of the disclosure. In this way, if these variations and transformations of the disclosure belong to the scopes of claims of the disclosure and equivalent technologies thereof, the disclosure is also intended to include these variations and transformations.