Silicon carbide ceramic and method for manufacturing composite drawing mould of diamond
A silicon carbide ceramic and diamond technology, which is applied in the field of mold technology preparation, can solve the problems of undiscovered silicon carbide ceramic and diamond coated composite molds, large performance dispersion of coated products, and significant impact on friction and wear characteristics. The effect of solving resource crisis, improving surface finish and saving raw materials
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[0026] Such as figure 1 As shown, where a is the original surface of the ceramic, showing sand holes (pit); b. is the surface after a diamond film deposition by CVD method and polished. The drastic reduction in the size of the trachoma is the result of a combination of faster diamond growth in the pits and thinning of the outer surface by polishing. c is the surface after the second CVD diamond deposition and polishing, and the size of the sand holes is further greatly reduced. d: After the third deposition and polishing, the trachoma almost disappeared. In this way, two purposes are achieved: (1) The trachoma defects gradually disappear, and the surface finish is greatly improved, which meets the requirements of the mold; (2) The diamond surface replaces the ceramic surface, because diamond is the hardest substance in the world, its Harder than ceramics (SiC, Si 3 N 4 、Al 2 o 3 etc.) are much higher, so the surface is ideally strengthened. The use of this ceramic / diamo...
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