Sintering behavior of Cr in different atmospheres and its effect on the microstructure and propertie

• 作 者: Ye Wang Qing-zhi Yan Fei-fei Zhang Chang-chun Ge Xiao-lu Zhang Hai-qin Zhao
• 机 构: Laboratory of Special Ceramics and Powder Metallurgy,University of Science and Technology Beijing,Be
• 出 处: International Journal of Minerals Metallurgy and Materials
• 发表日期: 2013年12期
• 关键词: Sintering sintered lubricant dispersive remarkably chromium molybdenum sintering

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.

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 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.