【摘 要】
：
The 93W and Mo1 refractory metals were bonded with different Cu1-xNix coating interlayers of various Ni content using plasma-activated sintering at 700 ℃.The e
【机 构】
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State Key Lab of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Tech
论文部分内容阅读
The 93W and Mo1 refractory metals were bonded with different Cu1-xNix coating interlayers of various Ni content using plasma-activated sintering at 700 ℃.The effects of the Ni content in the Cu1-xNix coating interlayer on the interfacial microstructure evolution and mechanical properties of the W/Mo joints were studied.The maximum average shear strength of the W/Mo joint was 316.5 MPa when the Ni content of the Cu1-xNix coating interlayer was 25 ％.When the Ni content of the Cu1-xNix coating interlayer was below 50 ％,the atomic diffusion at the W/Mo joint interface was adequate without the formation of intermetallic compounds,as demonstrated by the High Resolution Transmission Electron Microscope analyses of the joints.The presence of Ni in Cu1-xNix promoted diffusion bonding at the interface,which contributed to the high mechanical properties of the W/Mo joint.With an increase in the Ni content of the Cu1-xNix coating interlayer,the MoNi intermetallic compound (IMC) nucleated and grew at the Cu1-xNix coating/Mo1 interface.When the Ni content of the Cu1-xNix coating interlayer was above 50 ％,the generation of a brittle MoNi IMC weakened the shear strength of the W/Mo joint dramatically.
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