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.
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2021, Vol. 35 
