| C/SiC复合材料表面状态对其与Nb钎焊的影响 |
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| 引用本文： | 刘玉章,张丽霞,杨振文,冯吉才,李宏伟.C/SiC复合材料表面状态对其与Nb钎焊的影响[J].焊接学报,2010,31(10):31-34. |
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| 作者姓名： | 刘玉章 张丽霞 杨振文 冯吉才 李宏伟 |
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| 作者单位： | 哈尔滨工业大学,现代焊接生产技术国家重点实验室,哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 采用等原子比Ti-Ni复合箔对C/SiC复合材料与Nb进行了真空反应钎焊,研究了焊前C/SiC表面状态对接头界面组织和力学性能的影响.结果表明,线切割态的C/SiC与Nb的接头界面(Ti,Nb)C反应层呈现锯齿状,而抛光和砂纸打磨状态的C/SiC接头界面处的反应层平直.锯齿状的界面反应层降低了界面处的应力集中程度,有助于提高接头的力学性能,使得线切割态的C/SiC与Nb的接头强度明显高于抛光和打磨状态的接头,达到188MPa.线切割态的C/SiC与Nb的接头断裂同时发生在C/SiC母材、界面和钎缝中,而抛光和打磨状态的C/SiC与Nb的接头断裂主要发生在界面处.
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| 关 键 词： | C/SiC复合材料 钎焊 表面状态 组织 抗剪强度 |
| 收稿时间： | 2010/2/8 0:00:00 |
Effects of surface state of C/SiC composites on brazing of C/SiC to Nb |
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| LIU Yuzhang,ZHANG Lixi,YANG Zhenwen,FENG Jicai and LI Hongwei.Effects of surface state of C/SiC composites on brazing of C/SiC to Nb[J].Transactions of The China Welding Institution,2010,31(10):31-34. |
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| Authors: | LIU Yuzhang ZHANG Lixi YANG Zhenwen FENG Jicai and LI Hongwei |
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| Affiliation: | State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 15001, China,State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 15001, China,State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 15001, China,State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 15001, China and State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 15001, China |
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| Abstract: | C/SiC composites and Nb were brazed with equiatomic ratio Ti-Ni composite foils in vacuum,and the effects of surface state of C/SiC composites on the microstructure and property of the brazing joints were investigated.The results showed that the(Ti,Nb) C reaction layer between C/SiC and filler metal in the brazing joint was serrate when the C/SiC surface state was cut by the electric spark linear cutting machine,but the(Ti,Nb) C layers were both flat when the surface of C/SiC were polished and sanded before brazing.The serrate reaction layer decreased the stress concentration at the C/SiC-filler metal interface and was benefit for the joint.The shear strength of brazing joints of Nb and C/SiC at spark cutting state reached 188 MPa,which is much higher than that at polishing and sanding states.The fracture of brazing joints of Nb and C/SiC at spark cutting state took place at C/SiC base material,C/SiC-filler metal interface and filler metal,but that of the other two kinds of joints mainly occurred at the C/SiC-filler metal interface. |
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| Keywords: | C/SiC composites braze surface state microstructure shear strength |
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