Diffusion bonding between TZM alloy and WRe alloy by spark plasma sintering

被引：0

作者：

Hu, Dawei ^{[1
]}

Yang, Zhi ^{[2
]}

Hu, Ke ^{[2
]}

Tong, Yinggang ^{[1
]}

Zhang, Jiuxing ^{[2
]}

机构：

[1] Beijing Institute of Control Engineering, Beijing,100080, China

[2] School of Materials Science and Engineering, Hefei University of Technology, Hefei,230009, China

来源：

Hanjie Xuebao/Transactions of the China Welding Institution | 2018年 / 39卷 / 11期

关键词：

Microcracks - Diffusion in solids - Spark plasma sintering - Activation energy - Diffusion bonding - Refractory materials - Bending strength - Binary alloys - Fracture - Textures;

D O I：

10.12073/j.hjxb.2018390276

中图分类号：

学科分类号：

摘要：

Solid-state diffusion bonding of TZM alloy to WRe alloy was performed using spark plasma sintering (SPS). The microstructure, mechanical properties and thermal fatigue of the TZM/WRe joint were investigated in detail. The results showed that successful solid-state diffusion bonding was achieved between TZM alloy and WRe alloy using SPS at temperature of 1 500°C for 30 min. The TZM/WRe interface is free from discontinuities or microcracks. Recrystallization occurs in both the TZM alloy and WRe alloy during diffusion bonding. comparison with W and Re, the diffuse depth of Mo is greater than that of W and Re in the TZM alloy, due to its lower self-diffusion activation energy. The TZM/WRe joint shows excellent resistant ability to thermal shock and part of Mo grains grow through the TZM/WRe interface after enduring 100-cycles thermal shock. The bending strength and shearing strength of the TZM/WRe joint are 910 MPa±65 MPa, 497 MPa±50 MPa, respectively. Fracture occurs in the TZM alloy, and the fracture mode is dominated by transgranular cleavage fracture. © 2018, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.

引用

页码：73 / 77