球形石墨粉末及后处理工艺对SLS石墨原型件的影响

doi:10.11896/cldb.20080235

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Abstract The fluidity of natural flake graphite/phenolic resin mixed powder, synthetic graphite/phenolic resin mixed powder and the forming process of selective laser sintering (SLS) were studied in this paper, and natural flake graphite prototype and synthetic graphite prototype were treated by secondary curing, vacuum pressure impregnation densification. It is found that the addition of Spherical Graphite Powder could improve the flui-dity of the two graphite/phenolic resin powders, the bulk density of natural flake graphite/phenolic resin mixed powder is increased, but the bulk density of synthetic graphite/phenolic resin mixed powder is decreased. Under the same conditions, the fluidity of natural flake graphite/phenolic resin powders is better; in terms of forming precision, the synthetic graphite SLS prototype is isotropic, while the natural flake graphite SLS prototype is anisotropic; the synthetic graphite SLS prototype has higher bending strength than the natural flake graphite SLS Prototype; after secondary curing and vacuum pressure impregnation densification, the bending strength and thermal conductivity of synthetic graphite parts are also better.

Key words： natural flake graphite/phenolic resin mixed powder synthetic graphite/phenolic resin mixed powder selective laser sintering the forming process

Published: 25 December 2021 Online: 2021-12-27

CLC number:

TH145.1+3

Fund:This work was financially supported by the National Natural Science Foundation of China (51575313).

About author: Haihua Wuobtained a postdoctoral degree from Xi'an Jiaotong University and got an award for the First Hiwin Doctoral Dissertation. He is the professor, doctoral supervisor and head of advanced Manufacturing Technology Group of China Three Gorges University. Now, he is the vice president of the first session of the mold council in China Foundry Association. He is a professional committee of the graphite in China's Non-metallic Mineral Industry Association. He is a panel member in the expert committee in Microcrystalline Graphite of New Materials Technology Engineering Laboratory of Hunan province. He is a visiting professor at the Institute of the Chinese Academy of Engineering Physics Material. He is an evaluation expert at the National Natural Science Foundation of China.

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	WU Haihua
	ZHANG Cheng
	ZHONG Lei
	LIU Li
	LI Yafeng
	HE Junchao

Cite this article:

WU Haihua,ZHANG Cheng,ZHONG Lei, et al. Effect of Spherical Graphite Powder and Post-treatment Process on SLS Graphite Prototype[J]. Materials Reports, 2021, 35(24): 24047-24051.

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http://www.mater-rep.com/EN/10.11896/cldb.20080235 OR http://www.mater-rep.com/EN/Y2021/V35/I24/24047

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