Fast welding of chromium carbide and nickel alloy by spark plasma sintering

Guoxi Liu; Kezhi Li; Xiaoxuan Leng; Jinyong Zhang; Fan Zhang

doi:10.1007/s11595-016-1455-z

Journal of Wuhan University of Technology Materials Science Edition ›› 2016, Vol. 31 ›› Issue (4) : 835 -837. DOI: 10.1007/s11595-016-1455-z

Advanced Materials

Fast welding of chromium carbide and nickel alloy by spark plasma sintering

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Abstract

Spark plasma sintering (SPS) was used to weld the ceramics, eg, Cr₃C₂ and metal, Ni in this paper. It is found that the SPS can weld the Cr₃C₂ and Ni plates at lower temperatures and shorter holding time comparing with that of hot-pressing (HP). The binding strength was 113 MPa when the temperature was 1000 °C by SPS, compared with 10 MPa by HP at the same temperature. SPS remarkably enhances the atom diffusion in welding.Thermodynamics analysis at different welding temperatures and holding times of SPS or HP shows that the local temperature gradient, different from the past effects of by-passing current, is the dominative mechanism of the SPS welding.

Keywords

SPS / welding / Cr₃C₂ / Ni

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Guoxi Liu, Kezhi Li, Xiaoxuan Leng, Jinyong Zhang, Fan Zhang. Fast welding of chromium carbide and nickel alloy by spark plasma sintering. Journal of Wuhan University of Technology Materials Science Edition, 2016, 31(4): 835-837 DOI:10.1007/s11595-016-1455-z

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