高能球磨钨基高密度合金超细粉末的烧结

来源期刊：中南大学学报(自然科学版)1998年第5期

论文作者：范景莲 曲选辉 李益民 刘绍军 黄伯云

文章页码：45 - 48

关键词：高能球磨;高密度合金;超细粉;烧结

Key words：high energy ball mill; tungsten heavy alloy; nanocrystalline powder; sintering

摘    要：研究了采用行星式高能球磨机球磨后的97W－2Ni－1Fe(质量分数，%)高密度合金混合粉末的特性和烧结行为．实验结果表明，球磨可以生成纳米晶粉末和W的超饱和固溶体，产生大量的缺陷，促进烧结致密化，在1250～1420℃固相烧结时可以达到几乎全致密和得到非常细的晶粒．作者还对烧结过程中出现的问题进行了初步探讨.

Abstract: The present paper studies characteristics and sintering behavior of tungsten heavy alloy mixed powders as milled in a planetary ball mill. The results shown that the formation of nanocrystacline material compostition and tungsten based supersolid solution and substantial defects prompt rapid densification. In solid state sintering at 1250～1400 ℃, almost full density and very fine microstructure can be achieved, This paper also discusses the problems in the sintering process. Impurity caused in the process greatly affects sintering density and causes a lot of bubbles in the sample.