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Au-Pt-Cu계 합금의 미세구조 및 기계적 특성에 미치는 첨가원소 Sn의 효과에 관한 연구
도정만,임호남,이상혁,정호년 한국생체재료학회 2004 생체재료학회지 Vol.8 No.4
The effect of Tin on the microstructure and hardness of a Au-Pt-Cu ternary alloy was investigated using optical microscopy, differential scanning calorimeter, scanning electron microscopy, x-ray diffractometry, electron probe microanalizer and vickers hardness tester. A hardness of the solution treated Au-Pt-Cu-0.5Sn quarternary alloy with 0.5 wt.% was reached a maximum value (137 Hv) in 30 min at 600oC in the range of 250 to 850oC, but that of the alloy was rapidly increased until 30 min with increasing aging time at 600oC and the hardness was remained almost constant value above 30 min. Also, the microhardness of the matrix Au-Pt-Cu-Sn quarternary alloy aged at 600oC for 30 min was continuously increased with Tin contents and the grain size of Au-Pt-Cu-Sn quarternary alloy decreased as increased Tin contents. Analyses of EPMA and XRD revealed that the Au-Pt-Cu-Sn quarternary alloy is composed of a solid solution with a fcc structure and the Pt3Sn type precipitates. Based on this investigation, it can be concluded that an increase in the microhardness of the Au-Pt-Cu-Sn quarternary alloy is due to precipitation hardening of Pt3Sn.