FIBER COMPOSITE COMPONENT AND PRODUCTION METHOD

Abstract

A method for producing a fiber composite component and a fiber composite component for high-temperature applications. In particular, a workpiece carrier for providing and handling workpieces in high-temperature furnaces for high-temperature treatments or the like, a dimensionally stable green body of the fiber composite component being realized from a matrix material reinforced with fibers, said fiber composite component being realized by means of a heat treatment of the green body, a fiber being extruded together with a slip as a matrix material from a nozzle and being spatially arranged in such a manner that the green body is realized by means of additive manufacturing.

Claims

1. A method for producing a fiber composite component for high-temperature applications, in particular a workpiece carrier for providing and handling workpieces in high-temperature furnaces for high-temperature treatments or the like, a dimensionally stable green body of the fiber composite component being realized from a matrix material reinforced with fibers, said fiber composite component being realized by means of a heat treatment of the green body, wherein a fiber is extruded together with a slip as a matrix material from a nozzle and is spatially arranged in such a manner that the green body is realized by means of additive manufacturing.

2. The method according to claim 1, wherein the fibers are arranged in a structured fiber composite.

3. The method according to claim 1, wherein the slip is dimensionally stabilized after having been extruded, said dimensional stabilizing preferably being effected by drying, heat treating or curing a binder.

4. The method according to claim 1, wherein the fiber is freely deposited during the extrusion.

5. The method according to claim 1, wherein the green body is re-treated in a subsequent method step by way of pressing or vacuum molding.

6. The method according to claim 1, wherein the green body is realized so as to be shapeless or in a shape of the green body by way of an extrusion.

7. The method according to claim 1, wherein an inorganic matrix material is used as the matrix material, preferably a matrix material made from aluminum oxide, mullite, zirconium oxide, yttrium-aluminum garnet, silicon carbide and/or silicon nitride.

8. The method according to claim 1, wherein the slip includes a dispersing agent, preferably water, glycerine and/or ethyl alcohol being used as the dispersing agent.

9. The method according to claim 1, wherein the slip is thixotropic.

10. The method according to claim 1, wherein the slip includes additives, a binding agent and/or an antifoaming agent being used as additives.

11. The method according to claim 1, wherein the slip includes 20 percent by volume of small ceramic particles having a mean particle size of 0.1 m and 80 percent by volume of large ceramic particles having a mean particle size of 1 to 5 m being used.

12. The method according to claim 1, wherein the slip has a solids content of 35 percent by volume to 55 percent by volume.

13. The method according to claim 1, wherein a fiber made from aluminum oxide, mullite, zirconium oxide, yttrium-aluminum garnet, silicon carbide and/or silicon nitride is used as the fiber.

14. The method according to claim 1, wherein a fiber made from carbon is used as the fiber.

15. The method according to claim 1, wherein the fiber has a diameter of 5 m to 30 m.

16. The method according to claim 1, wherein the fiber is a continuous filament that is continuously supplied to the nozzle.

17. The method according to claim 1, wherein a filament yarn is extruded from the nozzle together with the slip, said filament yarn having 1.000 den to 50.000 den.

18. The method according to claim 1, wherein the fiber composite component is realized so as to have a fiber content of 10 percent by volume to 60 percent by volume.

19. The method according to claim 1, wherein the fiber composite component is realized as a workpiece carrier that is made of a support grid for positioning workpieces on the workpiece carrier, said support grid being made of support struts realizing a grid structure.

20. The method according to claim 19, wherein intersecting points or junction points of the grid structure are realized so as to have the same material thickness and/or the same fiber content.

21. A fiber composite component for high-temperature applications, in particular a workpiece carrier for providing and handling workpieces in high-temperature furnaces for high-temperature treatments or the like, the fiber composite component being realized from a dimensionally stable green body made from a matrix material reinforced with fibers, said fiber composite component being realized by means of a heat treatment of the green body, wherein the green body is realized by means of additive manufacturing by way of a spatial arrangement and of an extrusion of a fiber together with a slip as a matrix material from a nozzle.

Description

[0032] In the following, a preferred embodiment of the disclosure is explained in more detail, with reference auf the enclosed drawing.

[0033] In the figures:

[0034] FIG. 1: shows a workpiece carrier in a view from above;

[0035] FIG. 2: shows the workpiece carrier in a side view;

[0036] FIG. 3: shows a partial sectional view of the workpiece carrier from FIG. 1 along a line III-III;

[0037] FIG. 4: shows a schematic illustration of a nozzle for producing a fiber composite component.

[0038] A combined view of FIGS. 1 to 3 shows a fiber composite component 11 that is realized as a workpiece carrier 10. The workpiece carrier 10 realizes a support grid 12 having a grid structure 13, said grid structure 13 being realized from support struts 14 that are connected in intersecting points 15.

[0039] As the partial sectional illustration in FIG. 3 shows, the support struts 14 and the intersecting points 15 are realized from a structured fiber composite 16 from fibers 17 that reinforce a matrix material. The fibers 17 as well as the matrix material 18 consist of an inorganic material, such as aluminum oxide. The fibers 17 were extruded from a nozzle together with a slip and were spatially deposited one on top of the other and one next to the other in the arrangement illustrated here. The slip was dimensionally stabilized after having been extruded so that a green body was realized by way of this manner of additive manufacturing. The green body was realized by means of a heat treatment so as to form the fiber composite component 11.

[0040] FIG. 4 shows a schematic illustration of a nozzle 19 with the aid of which a fiber 20 is extruded together with a slip 21. The nozzle 19 includes a channel 22 for supplying the fiber 20 and a channel 23 for supplying the slip 21. At one nozzle end 24, the fiber 20 leaves the nozzle 19 together with the slip 21 and is deposited in or on fiber layers 25 in a structured fashion without any pressure. The slip 21, which is still liquid upon leaving, consolidates when the fiber 20 is being deposited on the fiber layer 25 so that a green body 26 is obtained, which is at least illustrated in part here, by way of a buildup of fiber layers 25. A mold for producing the green body 26 is not required, it is instead sufficient to arrange the fiber layers 25 on a flat underground 27.