Morphology-controllable synthesis and thermal decomposition of Ag and Ni oxalate for Ag-Ni alloy electrical contact materials.pdfVIP

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Morphology-controllable synthesis and thermal decomposition of Ag and Ni oxalate for Ag-Ni alloy electrical contact materials.pdf

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Morphology-controllable synthesis and thermal decomposition of Ag and Ni oxalate for Ag-Ni alloy electrical contact materials.pdf

Materials and Design 108 (2016) 640–647 Contents lists available at ScienceDirect Materials and Design journal homepage: /locate/matdes Morphology-controllable synthesis and thermal decomposition of Ag and Ni oxalate for Ag-Ni alloy electrical contact materials Zhijie Lin a, Shaohong Liu a,b, Ji-Guang Li c,?, Jialin Chen b, Ming Xie b, Xiaodong Li a, Mu Zhang a, Qi Zhu a, Di Huo a, Xudong Sun a,d,?? a Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning 110819, China b State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650106, China c Advanced Materials Processing Unit, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0044, Japan d School of Environmental and Chemical Engineering, Dalian University, Dalian, China HIGHLIGHTS ? Two Ag and Ni oxalate precursors (plates and particles) have been synthesized, and the formation mechanisms were investigated. ? Ag and Ni oxalate can thermal decompose into metallic Ag-Ni alloys at 400 °C in Ar, without further reduction in H2 gas. ? The sample reinforced by Ni plates shows a high electrical conductivity of 91.4 %IACS. ? The sample reinforced by dispersed nickel particles exhibits a better antiarc performance than that reinforced by Ni plates. GRAPHICAL ABSTRACT article info Article history: Received 6 May 2016 Received in revised form 26 June 2016 Accepted 28 June 2016 Available online 29 June 2016 Keywords: Ag-Ni alloys Morphology-controlled Thermal decomposition Electrical contact materials Anti-arc erosion abstract Two silver and nickel oxalate precursors with different morphologies (plates and particulates) were synthesized via precipitation of Ag+ and Ni2+ ions by C2O42?. In the case of high oxalate concentration and low pH value, the precursor was composed of Ag2C2O4 hexagonal plates with