Bonding performance of diamond grit to a Co-Si alloy

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作者：
Harbin Inst of Technology, Harbin, China [1 ]
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来源：
China Weld Eng Ed | / 2卷 / 112-116期
关键词：
Adhesives - Bond strength (materials) - Bonding - Cobalt alloys - Composition effects - Diffusion in solids - Polycrystalline materials - Service life - Silicon carbide - Sintering - Thermal effects;
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摘要：
The bonding performance between synthetic diamond grit and adhesive (Co-Si alloy) in polycrystalline diamond compact (PDC) has been investigated. The results indicate that the carbide-forming element Si diffuses towards the diamond grit and the quantity of Si element in the inter layer of diamond grit-adhesives is about two times higher than that in the other area. New compound SiC exists in the inter layer of diamond-adhesives. The formation of SiC enhances the strength and prolongs the service life of PDC. The sintering time is important to the formation of SiC.
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