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Microstructure and vacuum arc characteristics of CuO skeletal structure Ag-CuO contact materials.pdf
Journal of Alloys and Compounds 686 (2016) 702e707
Contents lists available at ScienceDirect
Journal of Alloys and Compounds
journal homepage: /locate/jalcom
Microstructure and vacuum arc characteristics of CuO skeletal structure Ag-CuO contact materials
Jun Wang a, *, Yongqiang Kang b, Chen Wang a
a School of Textile and Materials, Xi’an Polytechnic University, Xi’an 710048, PR China b Institute of Solid State Physics, Shanxi Datong University, Datong, Shanxi 037009, PR China
article info
Article history: Received 6 April 2016 Received in revised form 23 May 2016 Accepted 24 May 2016 Available online 26 May 2016
Keywords: Ag-CuO Contact materials Skeletal structure Arc erosion
abstract
In this paper, the novel Ag-45CuO contact materials with CuO skeletal structure were successfully prepared by high energy ball milling and hot pressing technology. The microstructure and vacuum arc characteristics of CuO skeletal structure Ag-45CuO materials were investigated. The as milled Ag-CuO powders were structurally characterized by X-ray diffraction (XRD). The microstructure and arc eroded surface morphologies of CuO skeletal structure Ag-45CuO materials were characterized by Scanning Electron Microscopy (SEM). Vickers microhardness and conductivity tests were conducted to determine the mechanical properties of the Ag-CuO samples. The results show that CuO skeletal structure in Ag-45CuO materials has formed and exhibit homogeneous CuO skeletal microstructure. With the CuO content increase from 20 wt.% to 45 wt.%, it was found that the microhardness increased over 2 times and the arc erosion areas decreased obviously, which indicates that the anti-arc erosion characteristic of CuO skeletal structure Ag-45CuO materials can be improved signi?cantly.
? 2016 Elsevier B.V. All rights reserved.
1. Introduction
Ag-MeO electrical contact materials, including Ag-CuO, Ag-CdO, Ag-SnO2, and Ag-ZnO materials are widely used in low voltage apparatus [1e3]. Meanwhile, Ag-CuO materials have a
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