Uzuka T, Kanzawa Y, Yasuda K
J Dent Res. 1981 May;60(5):883-9. doi: 10.1177/00220345810600050501.
The composition and temperature range of the AuCu-type superlattice formation in the Au-Cu-Ag ternary system was determined by X-ray powder diffraction. Four distinguishable phase transformations were detected, i.e., 1) alpha (disordered FCC phase) leads to AuCu I, 2) alpha leads to AuCu II, 3) alpha leads to alpha 1 (Cu-rich FCC phase) + alpha 2 (Ag-rich FCC phase). and 4) alpha leads to AuCu3. The stable temperature range of the AuCu I-type superlattice was restricted to a lower temperature range by adding silver to stoichiometric and off-stoichiometric Au-Cu alloys. Depending on the increase in silver content, the co-existing region of the AuCu II-type superlattice and the silver-rich alpha 2 phase extended to the lower temperature and over a wide composition range.
通过X射线粉末衍射确定了Au-Cu-Ag三元系中AuCu型超晶格形成的组成和温度范围。检测到四种可区分的相变，即：1）α（无序面心立方相）转变为AuCu I；2）α转变为AuCu II；3）α转变为α1（富铜面心立方相）+α2（富银面心立方相）；4）α转变为AuCu3。通过向化学计量比和非化学计量比的Au-Cu合金中添加银，AuCu I型超晶格的稳定温度范围被限制在较低温度范围。根据银含量的增加，AuCu II型超晶格和富银α2相的共存区域延伸到更低温度并在很宽的成分范围内。
