Synthesis and characteristics of W-Ni-Fe nano-composite powders prepared by mechanical alloying

被引：0
|
作者：
曲选辉
范景莲
黄伯云
机构：
来源：
Transactions of Nonferrous Metals Society of China | 2000年 / 02期
关键词：
tungsten-based heavy alloy; mechanical alloying; nano-crystalline powder;
D O I：
暂无
中图分类号：
TF12 [粉末冶金（金属陶瓷工艺）];
学科分类号：
080502 ;
摘要：
The mixture of 90W 7Ni 3Fe(mass fraction, %) powders was milled in a planetary ball mill. Its structure changed during milling, the surface characteristics and thermal stability of the milled powders were studied with X ray diffraction(XRD), Brunaure Emmett Teller (BET) nitrogen adsorption technique and differential thermal analysis(DTA). The results show that high energy ball milling leads to the formation of composite powders with amorphous binder phase and supersaturated W(Ni, Fe) nano crystalline grains in which great lattice distortion exists. The crystallization temperature of the amorphous binder phase during heating decreases with milling time. The specific surface area and the pore size of the powder mixtures decreases with milling time due to agglomeration and welding between particles.
引用
收藏
页码：172 / 175
页数：4
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