Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第11卷    第4期    总第43期    2001年8月

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文章编号:1004-0609(2001)04-0576-06
超高压梯度烧结法制备W/Cu功能梯度材料
凌云汉, 周张键, 李江涛, 杨大正, 葛昌纯

(北京科技大学 特陶中心,北京 100083)

摘 要:  提出了一种制备具有递变电阻及高熔点差功能梯度材料的新方法—超高压梯度烧结法,并成功制备出了相对密度达到96%的W/Cu梯度功能材料。推导了通电烧结过程中梯度材料内部的温度分布,表明温度场与电流密度及材料的厚度大致成平方的梯度分布模式;考察了不同的烧结助剂对W/Cu梯度材料致密化的影响,发现Ni比V和Zr有更好的致密化效果;观察了W/Cu梯度材料显微结构并对梯度烧结的过程机理进行了初步讨。

 

关键字: 梯度功能材料; 复合材料; W; Cu; 烧结

Fabrication of W/Cu functionally gradient material by
graded sintering under ultrahigh pressure
LING Yun-han, ZHOU Zhang-jian,
LI Jiang-tao, YANG Da-zheng, GE Chang-chUn

University of Science and Technology Beijing,
Beijing 100083, P.R.China

Abstract:  A new approach termed graded sintering under ultrahigh pressure (GSUHP) for fabricating functionally gradient material (FGM) that possesses escalated resistance distribution and large melting point difference was proposed and by  which a 96% theoretical density of W/Cu FGM was successfully fabricated. The temperature profile of FGM was simply deduced through energy equation and a graded temperature pattern which is proportional to current density and thickness of FGM squared was obtained. The influence of different binders on densification of W/Cu FGM was investigated, it was found that Ni has better sintering effect than Zr and V have. Microstructures of W/Cu FGM were observed and the mechanism was also preliminarily discussed.

 

Key words: functionally gradient material (FGM); composite; tungsten; copper; sintering

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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