| Gd_5Si_(1.8)Ge_(1.8)Sn_(0.4)合金的高温相变 |
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| 引用本文： | 唐永柏,陈云贵,张铁邦,肖素芬.Gd_5Si_(1.8)Ge_(1.8)Sn_(0.4)合金的高温相变[J].稀有金属,2010,34(1). |
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| 作者姓名： | 唐永柏 陈云贵 张铁邦 肖素芬 |
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| 作者单位： | 四川大学材料科学与工程学院,四川,成都,610064 |
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| 基金项目： | 国家自然科学重点基金，国家高技术研究发展计划项目 |
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| 摘 要： | 为认识合金的高温相变,采用热分析技术对Gd5Si1.8Ge1.8Sn0.4合金可能的高温相变进行了定性研究,并利用高温XRD研究了合金在200～400℃之间的相结构。研究结果表明:升温过程中,Gd5Si1.8Ge1.8Sn0.4合金在200～300℃之间发生了由Gd5Si2Ge2-型单斜结构向Gd5Si4-型正交结构的转变。从而为探索材料方便快捷的制备工艺提供技术支持。
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| 关 键 词： | 磁热效应 Gd_5Si_(1.8)Ge_(1.8)Sn_(0.4)合金 热分析 高温相变 |
High Temperature Phase Transition of Gd_5Si_(1.8)Ge_(1.8)Sn_(0.4) Alloy |
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| Tang Yongbai,Chen Yungui,Zhang Tiebang,Xiao Sufen.High Temperature Phase Transition of Gd_5Si_(1.8)Ge_(1.8)Sn_(0.4) Alloy[J].Chinese Journal of Rare Metals,2010,34(1). |
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| Authors: | Tang Yongbai Chen Yungui Zhang Tiebang Xiao Sufen |
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| Affiliation: | Tang Yongbai,Chen Yungui,Zhang Tiebang,Xiao Sufen (School of Materials Science , Engineering,Sichuan University,Chengdu 610064,China) |
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| Abstract: | In order to understand high temperature phase transformation of alloys,the qualitative high temperature phase transformation of Gd_5Si_(1.8)Ge_(1.8)Sn_(0.4) alloy was investigated by thermal analysis,and the phase structure from 200℃to 400 ℃ was analyzed by Xray diffraction(XRD).The results showed that with the increase of temperature,the Gd_5Si_2Ge_2-type monoclinic structure transformed to the Gd_5Si_4-type orthorhombic structure in Gd_5Si_(1.8)Ge_(1.8)Sn_(0.4) alloy between 200 and 300℃,which would be helpful for exploring the convenient and rapid preparation technology. |
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| Keywords: | magnetocaloric effect Gd_5Si_(1 8)Ge_(1 8)Sn_(0 4)alloy thermal analysis high temperature phase transition |
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