Influence of WO3 addition on the material transfer behavior of the AgTiB2 contact material.pdfVIP

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Influence of WO3 addition on the material transfer behavior of the AgTiB2 contact material.pdf

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Influence of WO3 addition on the material transfer behavior of the AgTiB2 contact material.pdf

Materials and Design 121 (2017) 85–91 Contents lists available at ScienceDirect Materials and Design journal homepage: /locate/matdes In?uence of WO3 addition on the material transfer behavior of the AgTiB2 contact material Hangyu Li a, Xianhui Wang a,?, Yong Xi a, Yanfeng Liu a, Xiuhua Guo b a School of Materials Science and Engineering, Xian University of Technology, Xian 710048, PR China b School of Materials Science and Engineering, Henan University of Science and Technology, Henan 471003, PR China HIGHLIGHTS ? The effect of WO3 addition on material transfer of AgTiB2 contacts is disclosed. ? WO3 addition changes material transfer mode for AgTiB2 contact material. ? WO3 addition can prevent the formation of cracks on the eroded surface. ? Material transfer and splash mechanism are discussed. GRAPHICAL ABSTRACT article info Article history: Received 24 November 2016 Received in revised form 15 February 2017 Accepted 18 February 2017 Available online 20 February 2017 Keywords: Ag base contact material Arc erosion Material transfer WO3 addition The cross-section morphologies of eroded anode and cathode for the Ag-4 wt.% TiB2 contact materials without and with WO3 addition at 29 A, showing that WO3 addition can prevent the formation of cracks on the eroded surface. abstract To clarify the effect of WO3 addition on the electrical performance of Ag-4 wt.%TiB2 contact material, each contact pair was made 20,000 operations at 12 V, 29 A for the Ag-4 wt.%TiB2 contact materials without and with WO3 addition. The morphology and chemical composition of arc eroded contact surface were characterized by scanning electron microscope and energy dispersive spectrometer, and the mass change before and after electrical contact test was determined as well. The results show that WO3 addition not only decreases the arc duration and arc energy, but also changes the arc erosion characteristics and material transfer mode. For the Ag-4 wt.%TiB2 contact material without WO3 addition, the m