Joining of SiO2 ceramic and TC4 alloy by nanoparticles modified brazing filler metal

被引：42
作者：
Bian, Hong [1 ,2 ]
Song, Yanyu [1 ,2 ]
Liu, Duo [1 ,2 ]
Lei, Yuzhen [2 ]
Song, Xiaoguo [1 ,2 ]
Cao, Jian [1 ]
机构：
[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China
[2] Harbin Inst Technol Weihai, Shandong Prov Key Lab Special Welding Technol, Weihai 264209, Peoples R China
来源：
CHINESE JOURNAL OF AERONAUTICS | 2020年 / 33卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Brazing; Microstructure; Nanoparticles modified filler; SiO2; ceramic; TC4; AG-CU; MECHANICAL-PROPERTIES; C/C COMPOSITES; INTERFACIAL MICROSTRUCTURE; SIO2F/SIO2; COMPOSITE; MATRIX COMPOSITES; TI-6AL-4V ALLOY; TI; GRAPHENE; JOINTS;
D O I：
10.1016/j.cja.2019.03.040
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
Nano-Al2O3 particles modified AgCuNi filler was adopted to braze the SiO2 ceramic and TC4. The effects of filler size as well as the brazing temperature on the interfacial microstructure and mechanical property of the joints were investigated. Nanoscale filler reduced the phases dimension and promoted the homogeneous distribution of microstructure, obtaining a higher joint strength when compared to microscale filler. The increase of brazing temperature made the accelerating dissolution and diffusion of Ti, which promoted the increase of thickness of Ti4O7 + TiSi2 layer adjacent to SiO2 ceramic and diffusion layer zone nearby TC4 alloy. The hypoeutectic structure was produced in the brazing seam due to the high Ti content. The maximum shear strength of similar to 40 MPa was obtained at 950 degrees C for 10 min. (C) 2019 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd.
引用
收藏
页码：383 / 390
页数：8
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