Winn H, Udoh K, Tanaka Y, Hernandez R I, Takuma Y, Hisatsune K
Department of Dental Materials Science, Nagasaki University School of Dentistry, Japan.
Dent Mater J. 1999 Sep;18(3):218-34. doi: 10.4012/dmj.18.218.
Phase transformation behaviors in Au-Cu-Pd alloys were investigated by means of electrical resistivity measurements, hardness tests, X-ray diffraction and transmission electron microscopy. Anisothermal and isothermal annealing were performed. Two types of phase transformations were found, namely related to the single phase of Au3Cu and the coexistent phase of Au3Cu and AuCu I. The latter produced more remarkable hardening than the former. Hardening was brought about by the antiphase domain size effect of Au3Cu ordered phase in the single phase and by the formation of AuCu I ordered phase in the Au3Cu ordered matrix. There are three modes of phase transformation in the coexistent region depending on the composition. Each sequence is discussed.
通过电阻率测量、硬度测试、X射线衍射和透射电子显微镜研究了Au-Cu-Pd合金中的相变行为。进行了非等温退火和等温退火。发现了两种类型的相变，即与Au3Cu单相相关的相变以及Au3Cu和AuCu I共存相的相变。后者比前者产生更显著的硬化。硬化是由单相中Au3Cu有序相的反相畴尺寸效应以及Au3Cu有序基体中AuCu I有序相的形成引起的。在共存区域中，根据成分有三种相变模式。对每种序列进行了讨论。
