| 超高压梯度烧结法制备W／Cu功能梯度材料 |
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| 引用本文： | 凌云汉,周张键,李江涛,杨大正,葛昌纯.超高压梯度烧结法制备W／Cu功能梯度材料[J].中国有色金属学报,2001,11(4):576-581. |
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| 作者姓名： | 凌云汉 周张键 李江涛 杨大正 葛昌纯 |
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| 作者单位： | 北京科技大学特陶中心 |
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| 基金项目： | 国家"八六三”计划资助项目(715-011-0230) |
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| 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探讨。
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| 关 键 词： | 梯度功能材料 钨／铜复合材料 烧结 PFM 聚变堆 |
| 文章编号： | 1004-0609(2001)04-0576-06 |
| 修稿时间： | 2000年10月26 |
Fabrication of W/Cu functionally gradient material by graded sintering under ultra-high pressure |
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| LING Yun han,ZHOU Zhang jian,LI Jiang tao,YANG Da zheng,GE Chang chun.Fabrication of W/Cu functionally gradient material by graded sintering under ultra-high pressure[J].The Chinese Journal of Nonferrous Metals,2001,11(4):576-581. |
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| Authors: | LING Yun han ZHOU Zhang jian LI Jiang tao YANG Da zheng GE Chang chun |
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| 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. |
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| Keywords: | functionally gradient material (FGM) composite tungsten copper sintering |
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