Study on the interfacial characteristics of Ti-coated diamond brazed by high-frequency induction

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Abstract:In the paper two types of diamond were brazed with Ni-based filler alloy by high-frequency induction under argon atmosphere at 1050°C within 15 seconds. The interfacial microstructures between brazed diamond and the filler alloy were analyzed by scanning electron microscopy, energy dispersion spectrometer and X-ray diffraction. It is surprisingly found that Cr-carbides form normally and compactly on Ti-coated diamond brazed surface, whereas Cr-carbides form tangentially and loosely on uncoated diamond brazed surface. Furthermore, the suggestion that Ti changed the morphology of Cr-carbides on Ti-coated diamond brazed surface was discussed and confirmed by the further tests specially designed. The abrading experiment results for the brazed diamonds showed that the bonding strength between the normally formed Cr-carbides and the diamond is higher than that between Cr-carbides and uncoated diamond.

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Issue:3

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