| 金属间化合物Cu4Al纳米微粉的热稳定性研究 |
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| 引用本文： | 韦建军,唐永建,王朝阳,吴卫东,王小琴.金属间化合物Cu4Al纳米微粉的热稳定性研究[J].强激光与粒子束,2005,17(12):1839-1842. |
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| 作者姓名： | 韦建军 唐永建 王朝阳 吴卫东 王小琴 |
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| 作者单位： | 1. 中国工程物理研究院 激光聚变研究中心， 四川 绵阳 621900；2. 四川大学 原子与分子物理研究所， 四川 成都 610065 |
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| 基金项目： | 国家自然科学基金重点资助课题（199895011）;中国工程物理研究院基金资助课题 |
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| 摘 要： | 对采用自悬浮定向流法制备的Cu4Al纳米微粉进行了差热分析(DTA)，发现在258,423和537 ℃存在不同量值的吸热峰。参照DTA曲线上吸热峰所对应的温度，分别对粉末样品进行了模拟退火实验，热处理后样品的X射线衍射（XRD）分析证实258和423 ℃处无结构相变发生，537 ℃处的吸热峰则对应于从Cu4Al向Cu3Al的相转变，并且伴随着Cu3Al晶粒的长大。对比实验结果表明，Cu4Al纳米微粉在440 ℃以下具有非常好的热稳定性，超过537 ℃将发生结构相变。
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| 关 键 词： | 纳米Cu4Al微粉 金属间化合物 热稳定 结构相变 ICF靶材料 |
| 文章编号： | 1001-4322(2005)12-1839-04 |
| 收稿时间： | 2005-06-10 |
| 修稿时间： | 2005-11-19 |
Thermal stability of nanocrystalline intermetallic compound Cu4Al powder |
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| WEI Jian-jun,TANG Yong-jian,WANG Chao-yang,WU Wei-dong,WANG Xiao-qin.Thermal stability of nanocrystalline intermetallic compound Cu4Al powder[J].High Power Laser and Particle Beams,2005,17(12):1839-1842. |
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| Authors: | WEI Jian-jun TANG Yong-jian WANG Chao-yang WU Wei-dong WANG Xiao-qin |
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| Institution: | 1. Research Center of Laser Fusion, CAEP, P.O. Box 919-987, Mianyang 621900, China;2. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China |
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| Abstract: | Thermal stability of nanocrystalline intermetallic compound Cu4Al obtained from flow-levitation method is studied by means of DTA(Differential Thermal Analysis) and XRD(X-Ray Diffraction).By DTA experiments on Cu4Al nanopowder,three endothermal peaks at 258 ℃,423 ℃ and 537 ℃ on DTA curve were found.By XRD experiments on original sample and its heat-treating samples,the results show that the endothermal peak at 537 ℃ is related to the structure phase transition from nanostructure Cu4Al to Cu3Al,accompanying growing up of Cu3Al crystalline grain.The test results are compared and it can be seen that Cu4Al nanopowder possess a nice thermal stability below 440 ℃,and it will bring about phase transition above 537 ℃. |
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| Keywords: | Powder of nanocomposite Cu4Al Intermetallic compound Thermal stability Structure phase transition ICF target materials |
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