A method for the manufacture of a carbon composite comprises compressing a combination comprising carbon and a binder at a temperature of about 350 C. to about 1200 C. and a pressure of about 500 psi to about 30,000 psi to form the carbon composite; wherein the binder comprises a nonmetal, metal, alloy of the metal, or a combination thereof wherein the nonmetal is selected from the group consisting of SiO.sub.2, Si, B, B.sub.2O.sub.3, and a combination thereof; and the metal is selected from the group consisting of aluminum, copper, titanium, nickel, tungsten, chromium, iron, manganese, zirconium, hafnium, vanadium, niobium, molybdenum, tin, bismuth, antimony, lead, cadmium, selenium, and a combination thereof.

Raw material powder containing metal powder as a main component is molded to form a metal powder molded body (3), and the metal powder molded body (3) is sintered to form a metal substrate (3). Further, a lubricating member (4) is made of an aggregate of graphite particles (13), and at least a part of a bearing surface (11) is formed of the lubricating member (4). The lubricating member (4) is fitted into the metal powder molded body (3). After that, the metal powder molded body (3) is sintered, and at this time, the lubricating member (4) is fixed onto the metal substrate (3) with a contraction force (F) generated in the metal powder molded body (3).

A nanocomposite comprising metal and carbon-based nanotube (CNT), wherein the carbon-based nanotube comprises a doping element selected from the group consisting of boron (B), iron (Fe), zinc (Zn), nickel (Ni), cadmium (Cd), tin (Sn), antimony (Sb), Nitrogen (N) and the combination thereof, and methods of making the nanocomposite.

A method for manufacturing a substrate for a lead acid battery includes manufacturing a powder mixture by mixing lead powder and carbon powder and manufacturing a substrate by compress-molding the powder mixture. 85 wt % to 95 wt % of the lead powder and 5 wt % to 15 wt % of the carbon powder are mixed, based on 100 wt % of the powder mixture.

Raw material powder containing metal powder as a main component is molded to form a metal powder molded body (3), and the metal powder molded body (3) is sintered to form a metal substrate (3). Further, a lubricating member (4) is made of an aggregate of graphite particles (13), and at least a part of a bearing surface (11) is formed of the fabricating member (4). The lubricating member (4) is fitted into the metal powder molded body (3). After that, the metal powder molded body (3) is sintered, and at this time, the lubricating member (4) is fixed onto the metal substrate (3) with a contraction force (F) generated in the metal powder molded body (3).

A method for the manufacture of a carbon composite comprises compressing a combination comprising carbon and a binder at a temperature of about 350 C. to about 1200 C. and a pressure of about 500 psi to about 30,000 psi to form the carbon composite; wherein the binder comprises a nonmetal, metal, alloy of the metal, or a combination thereof; wherein the nonmetal is selected from the group consisting of SiO.sub.2, Si, B, B.sub.2O.sub.3, and a combination thereof; and the metal is selected from the group consisting of aluminum, copper, titanium, nickel, tungsten, chromium, iron, manganese, zirconium, hafnium, vanadium, niobium, molybdenum, tin, bismuth, antimony, lead, cadmium, selenium, and a combination thereof.

This disclosure relates in general to three dimensional (3D) printers having a configuration that prepares a three-dimensional object by using a feedstock comprising a metal or a polymer compound and a carbon coating formed on a surface of the compound. This disclosure also relates to such feedstocks and their preparation methods. This disclosure further relates to 3D composite objects prepared by using such printers and feedstocks. This disclosure also relates to carbon containing photocurable formulations and methods for their preparation. This disclosure further relates to electrically conducting 3D polymer composites prepared by using such carbon containing photocurable formulations.

A coil and an energy conversion device are provided. The coil includes an enameled wire wound, and wherein the enameled wire includes a conductor portion, the conductor portion is made of materials including a base material and at least one of graphene and carbon nanotubes. A percentage of the base material in the materials is in a range of 70% to 99.8%, a percentage of the graphene in the materials is in a range of 0.2% to 30%, and a percentage of the carbon nanotubes in the materials is in a range of 0.2% to 30%. In this way, it is possible to simultaneously improve the conductivity and fatigue resistance characteristics of the enameled wire.

A method of producing a metal matrix composite by extruding a billet including both a metallic material and a non-metallic material through a die to form a metal matrix composite extrudate, where the non-metallic material is distributed evenly along a longitudinal length of the billet, where, during extrusion, a temperature of the billet does not exceed a melting temperature of the metallic material; and where the metal matrix composite extrudate has an extrusion ratio of at least 20:1.

An aluminum based composite material includes an aluminum parent phase and dispersions dispersed in the aluminum parent phase and formed such that a portion or all of additives react with aluminum in the aluminum parent phase, an average particle diameter of the dispersions is 20 nm or less, a content of the dispersions is 0.25% by mass or more and 0.72% by mass or less in terms of carbon amount, and an interval between the dispersions adjacent to each other is 210 nm or less.