The Effect of Sintering Conditions on the Microstructural Parameters of particle composites

摘要：

Tungsten heavy alloys are particle composites; they occupy a unique position in materials because of their combination of high density, strength and ductility. The main focus of this study was to examine the effect of sintering conditions (temperature and time) on the microstructural parameters of tungsten heavy alloys. Alloys composed of 88％, 93％ and 95％ wt. of tungsten and either Ni: Fe (in the ratio of 7:3) or Ni: Co (in the ratio of 7:3) were consolidated into green compacts. Samples of each of the six resulting alloys were sintered in hydrogen atmosphere at different temperatures for different sintering holding times. The microstructural parameters of both types were found to be roughly similar at each temperature and holding time. At higher sintering temperature and longer sintering holding times there was a matrix gradient and the formation of FeNi intermetallic phases at tungsten matrix interfaces. The microstructural parameters showed that the W-Ni-Co alloys may have some advantage as a result of their small tungsten grains and the lower contiguity.

关键词： tungsten heavy alloys liquid phase sintering microstructural parameters

作者: S.H. Islam MA Al-Eshaikh

作者单位: Research Center,College of Engineering,King Saud University,P.O.Box-800,Riyadh 11421,Saudi Arabia

会议类型: 国际会议

会议名称: 2010 International Conference on Material and Manufacturing Technology(2010材料与制造技术国际会议 ICMMT2010)

会议地点: 重庆

会议语种:英文

页码: 438-444

在线出版日期: 2010-09-17（万方平台首次上网日期，不代表论文的发表时间）