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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

梯度复合B4C/Cu面向等离子体材料的制备与表征

凌云汉; 李江涛; 葛昌纯   

  1. 北京科技大学特陶中心 北京 100083
  • 收稿日期:2000-11-27 修回日期:2001-01-18 出版日期:2001-11-20 网络出版日期:2001-11-20

Processing and Characterization of Graded B4 C/Cu Facing Plasma Composite

LING Yun-Han; LI Jiang-Tao; GE Chang-Chun   

  1. Laboratory of Special Ceramics & Powder Metallurgy; University of Science & Technology Beijing; Beijing 100083; China
  • Received:2000-11-27 Revised:2001-01-18 Published:2001-11-20 Online:2001-11-20

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摘要： 基于Ｂ４Ｃ和Ｃu材料具有明显电阻率及熔点差的特点，提出了在超高压下通电快速烧结Ｂ４Ｃ／Ｃｕ梯度复合材料的新工艺．在 ２～４ＧＰａ、１２ｋＷ，４０ｓ及适当的热处理条件下成功制备出了成分分布从０～１００％的接近理论密度的Ｂ４Ｃ／Ｃu层状复合材料；显微观察显示材料的成分和结构是呈梯度分布的．化学溅射实验表明其产额比 ＳＭＦ ８００核纯级石墨降低 ７０％；在Ｔｏｋａｍａｋ原位等离子体辐照下，材料表面无明显损伤．

关键词: 功能梯度材料, 复合材料, 面向等离子体材料, 碳化硼, 铜, 烧结

Abstract: Based on their distinct resistivity and melting point, a new approach for fabricating graded B4C/Cu composite by rapid self-resistance sintering under ultra-high
pressure was proposed in this paper and with which a near dense plasma facing material with 0-100% compositional distributions of B4C was obtained
on conditions of 12kW electric power input, 2-4GPa pressure applied, 40s duration and properly consecutive heat treatment. Well-graded composition and
structure of that composite were demonstrated by SEM analysis. Tests on plasma relevant performances show that the chemical sputtering yield of B4C/Cu graded
composite is 70% lower than that of SMF 800 nuclear graphite, and the surface of the composite is almost no damages after in-situ plasma irradiation in Tokamak apparatus.

Key words: functionally graded material, composite, plasma facing material, boron carbide, copper, sintering

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