Crystallization of amorphous Zr70Cu30-xNix alloys
来源期刊：Rare Metals2002年第3期
论文作者：WANG Huanrong, YE Yifu, HUI Xidong MIN Guanghui, TENG Xinying and SHI Zhiqiang Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan , China College of Resource and Environmental Engineering,
文章页码：213 - 217
摘 要：<正>X-ray diffraction （XRD） and differential scanning calorimetry （DSC） were employed to investigate the influence of Ni content on the crystallization of amorphous Zr70,Cu30-xNi, （atom fraction in %） alloys. Experimental results show that with the Ni content increasing the activation energies for crystallization of amorphous Zr70Cu30-xNix alloys increase correspondingly, indicating that the thermal stability is greatly improved. All the DSC traces of amorphous Zr70Cu30-xNix alloys exhibit two exothermic peaks, suggesting that the crystallization process proceeds via a double-stage mode. The first exothermic peak at lower temperature mainly corresponds to the precipitation and growth of Zr2Cu particles, while the second one corresponds to the precipitation of nano-scale Zr2Ni phase and crystallization of residual amorphous phase. The mechanism on the crystallization of amorphous Zr70Cu30-x ,Nix alloys was discussed.
WANG Huanrong, YE Yifu, HUI Xidong MIN Guanghui, TENG Xinying and SHI Zhiqiang Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061, China College of Resource and Environmental Engineering,
摘 要：<正>X-ray diffraction （XRD） and differential scanning calorimetry （DSC） were employed to investigate the influence of Ni content on the crystallization of amorphous Zr70,Cu30-xNi, （atom fraction in %） alloys. Experimental results show that with the Ni content increasing the activation energies for crystallization of amorphous Zr70Cu30-xNix alloys increase correspondingly, indicating that the thermal stability is greatly improved. All the DSC traces of amorphous Zr70Cu30-xNix alloys exhibit two exothermic peaks, suggesting that the crystallization process proceeds via a double-stage mode. The first exothermic peak at lower temperature mainly corresponds to the precipitation and growth of Zr2Cu particles, while the second one corresponds to the precipitation of nano-scale Zr2Ni phase and crystallization of residual amorphous phase. The mechanism on the crystallization of amorphous Zr70Cu30-x ,Nix alloys was discussed.
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