| Microstructure and mechanical properties of Zr-Cu-Al bulk metallic glasses |
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| 作者姓名： | 马文杰 王育人 魏炳忱 孙玉峰 |
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| 作者单位： | [1]National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China [2]Research Center for Materials, Department of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, China |
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| 基金项目： | 中国科学院知识创新工程项目 |
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| 摘 要： | Zr49Cu46Al5 and Zr48.5Cu46.5Al5 bulk metallic glasses（BMGs） with diameter of 5 mm were prepared through water-cooled copper mold casting. The phase structures of the two alloys were identified by X-ray diffractometry（XRD）. The thermal stability was examined by differential scanning calorimetry（DSC）. Zr49Cu46Al5 alloy shows a glass transition temperature, Tg, of about 689 K, an crystallization temperature, Tx, of about 736 K. The Zr48.5Cu46.5Al5 alloy shows no obvious exothermic peak. The microstructure of the as-cast alloys was analyzed by transmission electron microscopy（TEM）. The aggregations of CuZr and CuZr2 nanocrystals with grain size of about 20 nm are observed in Zr49Cu46Al5 nanocrystalline composite, while the Zr48.5Cu46,5Al5 alloy containing many CuZr martensite plates is crystallized seriously. Mechanical properties of bulk Zr49Cu46Al5 nanocrystalline composite and Zr48.5Cu46.5Al5 alloy measured by compression tests at room temperature show that the work hardening ability of Zr48.5Cu46.5A15 alloy is larger than that of Zr49Cu46Al5 alloy.
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| 关 键 词： | 微结构 金属 玻璃 机械力学 |
| 收稿时间： | 19 September 2006 |
| 修稿时间： | 2006-09-19 |
Microstructure and mechanical properties of Zr-Cu-Al bulk metallic glasses |
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| MA Wen-jie,WANG Yu-ren,WEI Bing-chen,SUN Yu-feng.Microstructure and mechanical properties of Zr-Cu-Al bulk metallic glasses[J].Transactions of Nonferrous Metals Society of China,2007,17(5):929-933. |
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| Authors: | MA Wen-jie WANG Yu-ren WEI Bing-chen SUN Yu-feng |
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| Affiliation: | 1. National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China; 2. Research Center for Materials, Department of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, China |
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| Abstract: | Zr49Cu46Al5 and Zr48.5Cu46.5Al5 bulk metallic glasses(BMGs) with diameter of 5 mm were prepared through water-cooled copper mold casting. The phase structures of the two alloys were identified by X-ray diffractometry(XRD). The thermal stability was examined by differential scanning calorimetry(DSC). Zr49Cu46Al5 alloy shows a glass transition temperature, Tg, of about 689 K, an crystallization temperature, Tx, of about 736 K. The Zr48.5Cu46.5Al5 alloy shows no obvious exothermic peak. The microstructure of the as-cast alloys was analyzed by transmission electron microscopy(TEM). The aggregations of CuZr and CuZr2 nanocrystals with grain size of about 20 nm are observed in Zr49Cu46Al5 nanocrystalline composite, while the Zr48.5Cu46.5Al5 alloy containing many CuZr rmartensite plates is crystallized seriously. Mechanical properties of bulk Zr49Cu46Al5 nanocrystalline composite and Zr48.5Cu46.5Al5 alloy measured by compression tests at room temperature show that the work hardening ability of Zr48.5Cu46.5Al5 alloy is larger than that of Zr49Cu46Al5 alloy. |
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| Keywords: | bulk metallic glass mechanical properties nanocrystalline composite |
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