Microstructure and strength of the Cf/SiC composite joint brazed with Co-Nb-Pd-Ni-V filler alloy

被引：0

作者：

Li W. ^{[1
]}

Xiong H. ^{[1
]}

Wu X. ^{[1
]}

Chen B. ^{[1
]}

机构：

[1] Welding and Plastic Forming Division, Beijing Institute of Aeronautical Materials, Beijing

来源：

Hanjie Xuebao/Transactions of the China Welding Institution | 2019年 / 40卷 / 09期

关键词：

Brazing; C[!sub]f[!/sub]/SiC composite; Interfacial reaction; Joint strength; Microstructure;

D O I：

10.12073/j.hjxb.2019400248

中图分类号：

学科分类号：

摘要：

The Cf/SiC composite joint was brazed with newly-designed Co-Nb-Pd-Ni-V filler alloy at the brazing temperature from 1 200℃ to 1 320℃, and the brazing time was fixed at 10 min. The results showed that elements V and Nb in filler alloy played active roles in the interfacial reactions during the brazing procedure, and two interfacial reaction layers VC and NbC were formed at the Cf/SiC surface. Under the brazing condition of 1 280℃/-10 min, the joint microstructure can be characterized as (VC/NbC) double layers/ (Co, Ni)2Si + CoSi + NbC + Pd2Si/ (NbC/VC) double layers. The optimum joint strength can be achieved brazed at 1 280℃ for 10 min, and the room-temperature bend strength was 61.0 MPa. Furthermore, the joint strength tested at 900 and 1 000℃ was even elevated to 83.2 and 87.7 MPa, respectively. The good high-temperature joint strength can be attributed to the formation of high-melting-point compounds, such as NbC and Pd2Si. © 2019, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.

引用

页码：128 / 132

页数：4

共 13 条

[11] Xiong H.P., Chen B., Pan Y., Et al., Joining of C<sub>f</sub>/SiC composite with a Cu-Au-Pd-V brazing filler and interfacial reactions, Journal of the European Ceramic Society, 34, pp. 1481-1486, (2014)
[12] Liu Y.Z., Zhang L.X., Liu C.B., Et al., Braing C/SiC composites and Nb with TiNiNb active filler metal, Science and Technology of Welding and Joining, 16, 2, pp. 193-198, (2011)
[13] Miedema A.R., De Boer F.R., Boom R., Et al., Tables for the heat of solution of liquid metals in liquid metal solvents, Calphad, 1, 4, pp. 353-359, (1977)

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