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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

气流粉碎B4C粉末的掺碳活化烧结研究

尹邦跃1; 王零森2   

  1. 1. 中国原子能科学研究院反应堆工程研究设计所， 北京 102413; 2。 中南大学粉末冶金国家重点实验室， 长沙 410083
  • 收稿日期:2002-05-08 修回日期:2002-06-24 出版日期:2003-05-20 网络出版日期:2003-05-20

Carbon-doping Activated Sintering of B4C Powders Obtained by Jet Milling

YIN Bang-Yue1; WANG Ling-Sen2   

  1. 1. Department of Reactor Engineering Research and Design; China Institute of Atomic Energy; Beijing 102413; China; 2. State Key Laboratory for Powder Metallurgy; Central South University; Changsha 410083; China
  • Received:2002-05-08 Revised:2002-06-24 Published:2003-05-20 Online:2003-05-20

PDF (PC)

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摘要： 开展了气流粉碎B4C粉末(比表面积2.53m2/g)的掺碳烧结实验,研究了掺碳剂种类、掺碳量、烧结温度、比表面积等对B4C烧结密度的影响。结果表明,掺碳显著促进B4C的烧结;在炭黑、葡萄糖和酚醛树酯三种掺碳剂中,掺入酚醛树酯可以获得最高的烧结密度;并且最佳的掺碳量为3％～5％C,B4C+3％C(酚醛树酯)分别经2200和2250℃烧结后的密度为92.1％TD和94.4％TD,若采用振动球磨B4C粉末(8.30m2/g)进行掺碳烧结实验,则可使2200℃的烧结密度提高到95.6％TD。

关键词: 碳化硼, 粉末, 气流粉碎, 活化烧结

Abstract: Studies on carbon-doping activated sintering of B4C powders with a specific surface area of
2.53m2/g obtained by jet milling were carried out. The effects of carbon-doping agent, carbon-doping content, and specific surface area
on B4C sintering density were also studied. The results show that carbon-doping promotes greatly the densification of B4C. Among three
carbon-doping agents such as black carbon, glucose, and phenolic resin, the addition of phenolic resin makes B4C reach a highest sintering
density, with an optimum carbon-doping content of 3%～5%C. The relative density of B4C is 92.1%TD when sintered at 2200℃ for 1h, and 94.4%TD at 2250℃. If the vibratory milled B4C powders with a specific surface area of 8.30m2/g are used, the density of B4C sintered at 2200℃ increases to 95.6%TD.

Key words: boron carbide, powder, jet milling, activated sintering

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