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Preparation process for highly oriented graphite composite material
The invention provides a preparation process for a highly oriented graphite composite material. The process is characterized by adopting the steps of: 1) preparing a graphite cast sheet by tape casting method: firstly adding a binder and a plasticizer into a solvent and mixing them evenly, then adding ceramic powder, mixing the mixture evenly to form a casting material, then performing tape casting, and carrying out drying and demoulding at room temperature to obtain a 50-150micrometer thick graphite cast sheet; 2) slicing the graphite cast sheet according to the mould size respectively; 3) superimposing the graphite cast sheet slices and placing them into a graphite grinding tool, and carrying out pre-press forming; 4) putting the pre-press formed green body and the graphite grinding tool into vacuum to conduct vacuum degreasing; and 5) carrying out hot pressing sintering in argon atmosphere, thus obtaining the highly oriented graphite composite material. The process provided by the invention is simple and is safe to operate, the prepared graphite composite material has high orientation, the bending strength and fracture toughness of loading in the vertical level direction are enhanced by 20% and 5% respectively than those of loading in the horizontal level direction. At the same time, the oxidation resistance is increased obviously.
Preparation process for highly oriented graphite composite material
The invention provides a preparation process for a highly oriented graphite composite material. The process is characterized by adopting the steps of: 1) preparing a graphite cast sheet by tape casting method: firstly adding a binder and a plasticizer into a solvent and mixing them evenly, then adding ceramic powder, mixing the mixture evenly to form a casting material, then performing tape casting, and carrying out drying and demoulding at room temperature to obtain a 50-150micrometer thick graphite cast sheet; 2) slicing the graphite cast sheet according to the mould size respectively; 3) superimposing the graphite cast sheet slices and placing them into a graphite grinding tool, and carrying out pre-press forming; 4) putting the pre-press formed green body and the graphite grinding tool into vacuum to conduct vacuum degreasing; and 5) carrying out hot pressing sintering in argon atmosphere, thus obtaining the highly oriented graphite composite material. The process provided by the invention is simple and is safe to operate, the prepared graphite composite material has high orientation, the bending strength and fracture toughness of loading in the vertical level direction are enhanced by 20% and 5% respectively than those of loading in the horizontal level direction. At the same time, the oxidation resistance is increased obviously.
Preparation process for highly oriented graphite composite material
ZHOU AIPING (author) / ZHANG YANPING (author) / ZHENG MINGWEN (author)
2015-09-09
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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