Department of Dental Materials, School of Dentistry, Matsumoto Dental University.
Dent Mater J. 2023 Sep 29;42(5):732-738. doi: 10.4012/dmj.2023-032. Epub 2023 Aug 22.
The aim of this study was to investigate the effect of repeated casting and heat treatment on the corrosion resistance of a commercial Ag-Pd-Cu-Au alloy as evaluated by electrochemical techniques. After repeated casting, the fifth cast of the Ag-Pd-Cu-Au alloy exhibited dramatic degradation of properties, although upon heat treatment, this corrosion resistance did improve. Despite the improvement by heat treatment, after five castings, this alloy may not have satisfactory hardness for clinical use. These results of this study demonstrate that, up to the fourth cast and heat treatment, the Ag-Pd-Cu-Au alloy has acceptable corrosion resistance and hardness.
本研究旨在通过电化学技术研究反复铸造和热处理对商业 Ag-Pd-Cu-Au 合金耐腐蚀性的影响。反复铸造后，第五次铸造的 Ag-Pd-Cu-Au 合金性能明显下降，尽管经过热处理，这种耐腐蚀性有所改善。尽管经过热处理有所改善，但经过五次铸造后，该合金的硬度可能无法满足临床使用的要求。本研究结果表明，在经过第四次铸造和热处理之前，Ag-Pd-Cu-Au 合金具有可接受的耐腐蚀性和硬度。
