ダイヤモンド-活性金属ろう界面における凝固現象および接合強度 : ダイヤモンドと金属の接合に関する研究(第1報)

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Natural diamond has been brazed to Fe-42Ni alloy sheet using Ag-Cu eutectic filter includingactive metal of 4.5 wt% Ti, in order to investigate on the relation between the segregation behavior of the active metal to the brazed interface and the joint strength. The examination of the effects of brazing thermal cycles on the reaction products and titanium segregation behavior at the diamond-filler interface showed that the microstructures at the interfacewere dendrite and cell structure in case of cooling rate of 12 K/sec and 1.5 K/sec respectively, and thatthe active metal (Ti) was not detected by Tu EDS in the both structures. This suggests that titaniumsegregation at the joint interface and the grain boundaries occurs as a result of exclusion of titaniumout of Ag-Cu eutectic crystals accompanied by the crystal growth. The joints were fractured at the interface between diamond and brazing filler using a developedtensile shear test method to get the joint strength and the fractured surfaces at the interface.The strength of the joint made by the cooling rate of 1.5 K/sec was higher than that madthe rate of 15 K/sec. The disregistry values were also calculated from the mismatch of surface orientations and lattice constants at the bonded interface.The results showed that the disregistry of diamond and TiC to Ti were remarkably larger than those to Cu and Ag, which corresponded to the joint strengths and the fracture paths.
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1994-11-05

ダイヤモンド-活性金属ろう界面における凝固現象および接合強度 : ダイヤモンドと金属の接合に関する研究(第1報)

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