| Surface tension of molten Ni-（Cr, Co, W） alloys and segregation of elements |
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| 引用本文： | 肖锋,刘兰霄,杨仁辉,赵红凯,方亮,张弛. Surface tension of molten Ni-（Cr, Co, W） alloys and segregation of elements[J]. 中国有色金属学会会刊, 2008, 18(5) |
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| 作者姓名： | 肖锋 刘兰霄 杨仁辉 赵红凯 方亮 张弛 |
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| 作者单位： | XIAO Feng,LIU Lan-xiao,YANG Ren-hui,ZHAO Hong-kai,ZHANG Chi(Materials Interracial Physical-Chemistry Research Institute, Chongqing Institute of Technology, Chongqing 400050, China);FANG Liang(Department of Applied Physics, Chongqing University, Chongqing 400044, China) |
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| 基金项目： | 教育部海外归国学者科研基金，Chongqing Bureau of Personal;China，重庆市教委资助项目，重庆工学院科研项目，重庆市科委科技计划 |
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| 摘 要： |
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| 关 键 词： | 镍铬合金 镍钴合金 镍钨合金 卧滴法 分离作用 |
Surface tension of molten Ni-(Cr, Co, W) alloys and segregation of elements |
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| XIAO Feng,LIU Lan-xiao,YANG Ren-hui,ZHAO Hong-kai,FANG Liang,ZHANG Chi. Surface tension of molten Ni-(Cr, Co, W) alloys and segregation of elements[J]. Transactions of Nonferrous Metals Society of China, 2008, 18(5) |
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| Authors: | XIAO Feng LIU Lan-xiao YANG Ren-hui ZHAO Hong-kai FANG Liang ZHANG Chi |
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| Affiliation: | [1]Materials Interracial Physical-Chemistry Research Institute, Chongqing Institute of Tectmology, Chongqing.400050, China; [2]Department of Applied Physics, Chongqing University, Chongqing 400044, China |
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| Abstract: | Surface tension of molten Ni-(Cr, Co, W) alloys was measured at the temperature of 1 773-1 873 K in an Ar+3%H2 atmosphere using an improved sessile drop method. The segregation of Cr, Co and W in alloy was calculated and analyzed using Butler's equation. The results show a good agreement between measured and calculated data. The surface tension of molten Ni-(Cr,Co, W) alloys decreases with increasing temperature. In Ni-(Cr, Co, W) alloys, the element with lower surface tension tends to segregate on the surface of molten alloy while that with higher surface tension tends to segregate inside of the molten alloy. The larger the differences in surface tension, atom radius and electron configuration between solvent and solute are, the more significant the segregation is. As a result, Ni segregates onto the surface and Co and W segregate inside the alloys. |
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| Keywords: | Ni-Cr Ni-Co Ni-W surface tension sessile drop method segregation |
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