Guastaldi A C, Adorno A T, Beatrice C R, Mondelli J, Ishikiriama A, Lacefield W
Faculdade de Odontología de Bauru Universidade de São Paulo.
Rev Odontol Univ Sao Paulo. 1990 Oct-Dec;4(4):304-8.
This article characterizes the structural phases present in the copper-based metallic alloy system "Cu-Zn-Al-Ni" developed for dental use, and relates those phases to other properties. The characterization was obtained after casting (using the lost wax process), and after heat treatment. In order to obtain better corrosion resistance by changing the microstructure, the castings were submitted to 30, 45 and 60 minutes of heat treatment at the following temperatures: 750 degrees C, 800 degrees C, and 850 degrees C. The various phases were analyzed using X-ray diffraction and scanning electron microscopy (SEM). The results after heat treatment showed a phase (probably Cu3Al), that could be responsible for the improvement in the alloy's resistance to corrosion as compared to the as-cast structure.
本文描述了为牙科应用开发的铜基金属合金系统“Cu-Zn-Al-Ni”中存在的结构相，并将这些相与其他性能相关联。表征是在铸造后（使用失蜡工艺）以及热处理后进行的。为了通过改变微观结构获得更好的耐腐蚀性，铸件在以下温度下进行了30、45和60分钟的热处理：750摄氏度、800摄氏度和850摄氏度。使用X射线衍射和扫描电子显微镜（SEM）分析了各种相。热处理后的结果表明存在一种相（可能是Cu3Al），与铸态结构相比，该相可能是合金耐腐蚀性提高的原因。
