The role of foam on microstructure and strength of the brazed C/C composites/Ti6Al4V alloy joint

被引：36

作者：

Guo, Wei ^{[1
]}

Xue, Junliang ^{[1
]}

Zhang, Hongqiang ^{[1
]}

Cui, Hang ^{[1
]}

Zhu, Ying ^{[1
]}

Peng, Peng ^{[1
]}

Qi, Bojin ^{[1
]}

机构：

[1] Beihang Univ, Sch Mech Engn & Automat, Beijing 100191, Peoples R China

来源：

VACUUM | 2020年 / 179卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Vacuum brazing; C/C composites; Ti6Al4V alloy; Cu foam; MECHANICAL-PROPERTIES; INTERFACIAL MICROSTRUCTURE; COMPOSITE/TI6AL4V JOINTS; PROCESSING PARAMETERS; SIC NANOWIRES; TIAL ALLOYS; CU FOAM; GRAPHENE; NB; DESIGN;

D O I：

10.1016/j.vacuum.2020.109543

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

C/C composites and Ti6Al4V alloy had been brazed and the Cu foam was used as an interlayer to inhibit the formation of brittle compounds in the brazing seam. Adding Cu foam interlayer had caused the significant change in the microstructure of joint. An infiltration zone was formed at the C/C composite side and perpendicular to the bonding interface, and Ti was the primary element of infiltration zone. The brazing seam was composed of (Cu(s,s)) and Ag(s,s), and reaction layer close to Ti6Al4V alloy side contained many layers. Adding Cu foam decreased the hardness value of brazing seam to 77.6 HV. The decrease in hardness of brazing seam and reaction layer was beneficial to improving reliability of joints. Thermal cycle lifetime of joints increased by nearly 2 times after adding foam.

引用

页数：7

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