| 源自Ni-Nb共晶团簇式的Ni-Nb-(Zr,Ta,Ag)三元块体非晶合金成分设计 |
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| 引用本文： | 袁亮,羌建兵,庞厰,王英敏,王清,董闯.源自Ni-Nb共晶团簇式的Ni-Nb-(Zr,Ta,Ag)三元块体非晶合金成分设计[J].金属学报,2011(8). |
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| 作者姓名： | 袁亮 羌建兵 庞厰 王英敏 王清 董闯 |
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| 作者单位： | 大连理工大学三束材料改性教育部重点实验室; |
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| 基金项目： | 国家自然科学基金项目50901012和51041011; 国家重点基础发展计划项目2007CB613902; 高等学校科技创新工程重大项目培育资金项目707015资助~~ |
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| 摘 要： | 利用团簇+连接原子模型设计Ni-Nb基三元块体非晶成分.首先,解析出二元共晶点Ni_(59.5)Nb_(40.5)的团簇式(Ni_(0.5)Nb_(0.5))-Ni_6Nb_6]Ni_3,其中,(Ni_(0.5)Nb_(0.5))Ni_6Nb_6为源自Ni_6Nb_7(Fe_7W_6型)共晶相的以(Ni_(0.5)Nb_(0.5))为心的二十面体团簇.相应的,具有最大非晶形成能力的Ni-Nb二元成分Ni_(62)Nb_(38)可描述成团簇式Ni-Ni_6Nb_6]Ni_3,此时,二十面体团簇的中心位置完全由Ni占据.以Ni-Ni_6Nb_6]Ni_3二元非晶团簇式为基础,通过引入第3组元Zr,Ta或Ag,设计出具有更高非晶形成能力的Ni-Nb-(Zr,Ta,Ag)三元合金,利用水冷铜模吸铸方法获得临界直径为3 mm的块体非晶.热分析和力学测试表明这些三元块体非晶具有较高的热稳定性,其中Ni-Ni_6Nb_5Ta]Ni_3具有最高的玻璃转变温度T_g(935 K)和晶化温度T_x(952 K);这些三元块体非晶具有一定的塑性变形能力(延伸率约为0.3%),Ni-Ni_6Nb_5Zr]Ni_3和Ni-...
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| 关 键 词： | Ni-Nb基块体非晶 成分设计 团簇 连接原子模型 |
COMPOSITION DESIGN OF Ni-Nb-(Zr,Ta,Ag) TERNARY BULK METALLIC GLASSES BASED ON CLUSTER FORMULA OF Ni-Nb EUTECTIC |
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| YUAN Liang,QIANG Jianbing,PANG Chang,WANG Yinmin,WANG Qing,DONG Chuang Key Laboratory of Materials Modification,Ministry of Education,Dalian.COMPOSITION DESIGN OF Ni-Nb-(Zr,Ta,Ag) TERNARY BULK METALLIC GLASSES BASED ON CLUSTER FORMULA OF Ni-Nb EUTECTIC[J].Acta Metallurgica Sinica,2011(8). |
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| Authors: | YUAN Liang QIANG Jianbing PANG Chang WANG Yinmin WANG Qing DONG Chuang Key Laboratory of Materials Modification Ministry of Education Dalian |
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| Affiliation: | YUAN Liang,QIANG Jianbing,PANG Chang,WANG Yinmin,WANG Qing,DONG Chuang Key Laboratory of Materials Modification(Dalian University of Technology),Ministry of Education,Dalian 116024 |
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| Abstract: | A cluster-plus-glue atom model was employed to design Ni-Nb based ternary bulk metallic glasses.The binary eutectic point Ni_(59.5)Nb_(40.5) was first interpreted by the model in form of a cluster formula(Ni_(0.5)Nb_(0.5))-Ni_6Nb_6]Ni_3,where the cluster is(Ni_(0.5)Nb_(0.5))-centered icosahedron derived from a eutectic phase Ni_6Nb_7(Fe_7W_6 type).It was then pointed out that the best binary glass former Ni_(62)Nb_(38) could be interpreted based on the eutectic cluster formula by replacing the cluster cent... |
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| Keywords: | Ni-Nb-based bulk metallic glasses composition design cluster-plus-glue atom model |
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