Mg-Ca-Zn alloy metallic foam has been recently recognized as biodegradable implant. In this present work, the characteristics of Mg-Ca-Zn alloy metallic foam which made by foaming of powder compact based on Mg-Zn-CaH2 system were investigated. Mg-Zn-CaH2 powder with nominal compositions of 97.5 weight % Mg, 2 weight % Zn, 0.5 weight % CaH2 and 96.8 weight % Mg, 2 weight % Zn, 1.2 weight % CaH2 were prepared by dry milling process for 6 h and characterized by differential thermal analysis (DTA). The prepared powders are pressed for 6.5MPa at room temperature and sintered for 2 h at various temperatures of 350 °C and 600 °C. The alloys were analyzed by x-ray diffraction and scanning electron microscope (SEM). The results indicated that addition of calcium hydride as blowing agent affects phase formation of Mg2Ca and Mg2Zn3, sintering temperature and grain refining of Mg-Ca-Zn alloy.
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Kartika et al. (2014) studied this question.
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