Microstructure evolution and brazing mechanisms of the Ti2AlC/Ni joints using nickel based filler alloy
Microstructure evolution and brazing mechanisms of the Ti2AlC/Ni joints using nickel based filler alloy
复制标题
镍基填充合金 Ti2AlC/Ni 接头的显微组织演变和钎焊机理
DOI：
10.1016/j.jeurceramsoc.2016.05.024
复制
发表时间：
2016-11-01
影响因子：
5.7
通讯作者：
Liu, Chunfeng
中科院分区：
文献类型：
--
作者：
Lu, Chengjie;Zhang, Jie;Liu, Chunfeng
The brazing of the Ti2AlC ceramic to nickel has been successfully performed using nickel based filler alloy, to extend high temperature applications of Ti2AlC ceramic. The interfacial morphology was observed by SEM, and the phases in the joint were characterized by EDS and XRD. During the brazing process, the diffusion of Ni from filler alloy to the Ti2AlC substrate was discovered. Afterwards, the diffusion kinetics were studied by measuring the thickness of the 'interaction zone', and the activation energy was calculated to be 152 kJ/mol. In addition, the effect of brazing parameters on shear strength was studied. The results revealed that increasing thickness of the 'interaction zone' and 'filler zone' was favorable for relieving the thermal stress in the joint, led to an improvement in mechanical properties. Finally, the maximum shear strength of the Ti2AlC/Ni brazed joints was measured to be 193 MPa, obtained at 1100 degrees C for 30 min. (C) 2016 Elsevier Ltd. All rights reserved.
