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Sintering behavior of Cr in different atmospheres and its effect on the microstructure and properties of copper-based composite materials

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Abstract

Copper matrix composites consisting of chromium (Cr) or ferrochrome (Cr-Fe) as strengthening elements and molybdenum disulfide as a lubricant had been sintered in nitrogen and hydrogen atmosphere, respectively. Their morphology and energy-dispersive X-ray spectrometry (EDS) analysis showed that serious interaction occurred between MoS2 and Cr (or Cr-Fe) particles when the samples were sintered in hydrogen atmosphere. Chromium sulfide compound (Cr x S y ) was formed as a reaction product, which decreased the density and strength of the composites remarkably. This interaction was inhibited when the samples were sintered in nitrogen atmosphere; thus, the mechanical properties of the composites were improved.

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Authors and Affiliations

  1. Laboratory of Special Ceramics and Powder Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China

    Ye Wang, Qing-zhi Yan, Fei-fei Zhang & Chang-chun Ge

  2. Beijing Railway Star Fortune Technology Co., Ltd., Beijing, 102200, China

    Xiao-lu Zhang

  3. CSR Qingdao Sifang Locomotive & Rolling Stock Co., Ltd., Qingdao, 266111, China

    Hai-qin Zhao

Authors
  1. Ye Wang
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  2. Qing-zhi Yan
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  3. Fei-fei Zhang
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  4. Chang-chun Ge
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  5. Xiao-lu Zhang
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Correspondence to Qing-zhi Yan.

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Wang, Y., Yan, Qz., Zhang, Ff. et al. Sintering behavior of Cr in different atmospheres and its effect on the microstructure and properties of copper-based composite materials. Int J Miner Metall Mater 20, 1208–1213 (2013). https://doi.org/10.1007/s12613-013-0856-7

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  • DOI: https://doi.org/10.1007/s12613-013-0856-7

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