Metahi H
Shika Rikogaku Zasshi. 1976 May;17(38):120-31.
The effects of Palladium addition to stoichiometric AuCu on the age-hardening are studied by means of resistivity, hardness, X-ray diffraction, and optical and electron microscopic observation. The results obtained are summerized as follows. The shapes of the age-hardening curves in the alloys less than 23.4 at. % Pd, showed an abrupt increase at the early stage of ageing. However, in the alloy containing 34.4 at. % Pd, the age-hardening was not observed. The maximum hardness of the AuCu-12 at. % Pd alloy was higher than that of the AuCu-6 at. % Pd and AuCu-23.4 at. % Pd alloys. The difference in hardening in these alloys was explained by the effect of atomic sites of palladium occupied in AuCu superlattice. Optical and electron micrographs showed that twinning occurs in order to relief the elastic strain induced by growth of AuCu I type superlattice platelets.
通过电阻率、硬度、X射线衍射以及光学和电子显微镜观察等手段，研究了向化学计量比的AuCu中添加钯对时效硬化的影响。所得结果总结如下。钯含量低于23.4原子百分比的合金，其时效硬化曲线形状在时效初期呈现出急剧上升。然而，在含34.4原子百分比钯的合金中，未观察到时效硬化现象。AuCu - 12原子百分比钯合金的最大硬度高于AuCu - 6原子百分比钯合金和AuCu - 23.4原子百分比钯合金。这些合金中硬化的差异是由钯在AuCu超晶格中占据的原子位置的影响来解释的。光学和电子显微镜照片显示，孪晶的出现是为了缓解由AuCu I型超晶格片层生长引起的弹性应变。
