AgCu+SiC复合钎料中SiC含量对Al<sub>2</sub>O<sub>3</sub>/TC4接头组织和性能的影响

李淳; 郑祖金; 亓钧雷; 冯吉才; 曹健

doi:10.12073/j.hjxb.2019400002-y

AgCu+SiC复合钎料中SiC含量对Al₂O₃/TC4接头组织和性能的影响

1.
哈尔滨工业大学先进焊接与连接国家重点实验室, 哈尔滨 150001
2.
哈尔滨工业大学材料科学与工程学院, 哈尔滨 150001

基金项目: 国家自然科学基金青年项目（51805114）；国家自然科学基金航天联合基金项目（U1737205）；国家自然科学基金优秀青年科学基金项目（51622503）

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- 收稿日期: 2019-04-03

Effect of the SiC content in the Ag-Cu+SiC composite brazing filler on the microstructure and mechanical properties of the Al₂O₃/TC4 brazing joint

1.
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
2.
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

摘要

摘要: 采用AgCu+SiC复合钎料钎焊连接了Al₂O₃陶瓷与TC4钛合金，研究了SiC增强相含量与钎焊温度对接头组织与性能的影响，发现接头的典型组织为Al₂O₃陶瓷/Ti₃Cu₃O/Ag基固溶体+Cu基固溶体+TiC+Ti₅Si₃/TiCu₂/TiCu/TC4钛合金. 陶瓷一侧的反应层随着钎焊温度的升高而变厚，随着增强相含量的增加而变薄，当增强相含量较少时，反应产物呈弥散分布，当增强含量较多时，反应产物发生了团聚现象. 钎焊的反应产物随着钎焊温度的升高由团聚分布变为弥散分布. 接头的抗剪强度随着增强相的含量与钎焊温度的升高先增加后降低，当增强相含量为3%（质量分数），钎焊温度为870℃时达到最大，为98 MPa.
- 氧化铝陶瓷 /
- 钛合金 /
- 钎焊 /
- 微观组织 /
- 接头强度
Abstract: The joining between Al₂O₃ and TC4 titanium alloy was realised using Ag-Cu+SiC composite filler metal. The effects of the mass fraction of SiC and the brazing temperature on microstructure and mechanical properties of the joint were investigated. It was found that the typical microstructure of the joint is Al₂O₃/Ti₃Cu₃O/Ag solid solution + Cu solid solution +TiC+Ti₅Si₃/TiCu₂/TiCu/TC4. The thickness of the reaction layer adjacent to the ceramic is increasing with the rising of the temperature and is decreasing with the growing mass fraction of the SiC. For the joint with a small amount of SiC, the reaction products distribute uniformly, while for the joint with a large amount of SiC, the reaction products tends to agglomerate. Reaction products of brazing change from agglomerated distribution to uniform distribution with the increase of brazing temperature. The shear strength of the joint first increases and then decreases with the increase of the brazing temperature and the SiC mass fraction. The highest shear strength of the joint reaches 98 MPa when the mass fraction of the strengthening phase is 3% and the brazing temperature is 870℃.
- alumina ceramics /
- titanium alloy /
- brazing /
- microstructure /
- strength of the joint

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参考文献(21)

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AgCu+SiC复合钎料中SiC含量对Al2O3/TC4接头组织和性能的影响

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出版历程

Effect of the SiC content in the Ag-Cu+SiC composite brazing filler on the microstructure and mechanical properties of the Al2O3/TC4 brazing joint

期刊类型引用(9)

其他类型引用(9)

计量

出版历程

目录

AgCu+SiC复合钎料中SiC含量对Al₂O₃/TC4接头组织和性能的影响

Effect of the SiC content in the Ag-Cu+SiC composite brazing filler on the microstructure and mechanical properties of the Al₂O₃/TC4 brazing joint