| 电磁冷坩埚定向凝固Nb-Si基多元合金微观组织 |
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| 引用本文： | 丁宏升,燕云程,康永旺,宋尽霞,陈瑞润,郭景杰. 电磁冷坩埚定向凝固Nb-Si基多元合金微观组织[J]. 稀有金属材料与工程, 2014, 43(10): 2419-2424 |
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| 作者姓名： | 丁宏升 燕云程 康永旺 宋尽霞 陈瑞润 郭景杰 |
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| 作者单位： | 哈尔滨工业大学金属精密热加工国家级重点实验室;北京航空材料研究院 |
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| 摘 要： | 用电磁冷坩埚定向凝固制备了Nb-24Ti-12Si-4Cr-4Al-2Hf(at%)合金。X射线衍射分析(XRD)表明初始生长区和稳态生长区内的物相均为Nbss,β-Nb5Si3和γ-Nb5Si3。通过透射电镜明场像(BFI)和选区电子衍射斑点分析(SADP)确定呈六边形小平面相的硅化物是γ-Nb5Si3,条状或片状形态的硅化物是β-Nb5Si3。扫描电子显微镜照片(BEI)表明:初始生长区和稳态生长区内的组织均由初生的Nbss和Nbss/Nb5Si3共晶组成,其中共晶分为Nbss/β-Nb5Si3和Nbss/γ-Nb5Si3;初始生长区的横截面组织存在2种形态的胞状共晶;稳态生长区的横截面组织存在3种形态的胞状共晶;与初始生长区内的组织相比,稳态生长区内的组织较为细小且分布均匀;γ-Nb5Si3的生长在稳态生长区内受到抑制。
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| 关 键 词： | 电磁冷坩埚定向凝固 β-Nb5Si3 γ-Nb5Si3 小平面相 胞状共晶 |
Microstructure of the Nb-Si Based Multicomponent Alloy by Electromagnetic Cold Crucible Directional Solidifcation |
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| Ding Hongsheng,Yan Yuncheng,Kang Yongwang,Song Jinxi,Chen Ruirun and Guo Jingjie. Microstructure of the Nb-Si Based Multicomponent Alloy by Electromagnetic Cold Crucible Directional Solidifcation[J]. Rare Metal Materials and Engineering, 2014, 43(10): 2419-2424 |
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| Authors: | Ding Hongsheng Yan Yuncheng Kang Yongwang Song Jinxi Chen Ruirun Guo Jingjie |
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| Affiliation: | National Key Laboratory for Precision Hot Processing of Metal, Harbin Institute of Technology, Harbin 150001, China,National Key Laboratory for Precision Hot Processing of Metal, Harbin Institute of Technology, Harbin 150001, China,Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China,Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China,National Key Laboratory for Precision Hot Processing of Metal, Harbin Institute of Technology, Harbin 150001, China and National Key Laboratory for Precision Hot Processing of Metal, Harbin Institute of Technology, Harbin 150001, China |
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