球磨时间对Cr-33Ta粉的结构与形貌的影响

雷学海; 肖璇; 胡孔生; 周天宁

doi:10.15980/j.tzzz.2014.01.008

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球磨时间对Cr-33Ta粉的结构与形貌的影响
Effect of Ball Milling Time on the Microstructure and Morphology of Cr-33Ta Powders
2014年34卷第1期页码：9-12
纸质出版日期： 2014 ，
DOI： 10.15980/j.tzzz.2014.01.008

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[1]雷学海,肖璇,胡孔生,周天宁.球磨时间对Cr-33Ta粉的结构与形貌的影响[J].特种铸造及有色合金,2014,34(01):9-12.

Lei Xuehai, Xiao Xuan, Hu Kongsheng, et al. Effect of Ball Milling Time on the Microstructure and Morphology of Cr-33Ta Powders[J]. Special Casting & Nonferrous Alloys, 2014,34(1):9-12.
[1]雷学海,肖璇,胡孔生,周天宁.球磨时间对Cr-33Ta粉的结构与形貌的影响[J].特种铸造及有色合金,2014,34(01):9-12. DOI： 10.15980/j.tzzz.2014.01.008.

Lei Xuehai, Xiao Xuan, Hu Kongsheng, et al. Effect of Ball Milling Time on the Microstructure and Morphology of Cr-33Ta Powders[J]. Special Casting & Nonferrous Alloys, 2014,34(1):9-12. DOI： 10.15980/j.tzzz.2014.01.008.

摘要

利用XRD、SEM、EDS对采用机械合金化方法制备的Cr-33Ta混合粉的结构及形貌演变进行了研究。结果表明

随着球磨时间延长

Cr-33Ta混合粉成分逐渐均匀并演变成Cr（Ta）和Ta（Cr）非平衡过饱和固溶体;Cr和Ta的晶粒尺寸逐渐减小

微观应变逐渐增加。机械合金化使Cr-33Ta元素混合粉由原始棱角尖锐的碎石状逐渐演变为近球状等轴颗粒

球磨20h后的颗粒与晶粒尺寸得到明显细化

平均颗粒尺寸小于5μm

Ta和Cr的晶粒尺寸分别达到纳米级。

Abstract

Effects of mechanical alloying on the microstructure and morphology of Cr-33Ta powders were investigated by means of X-ray diffraction（XRD）

scanning electrical microscopy（SEM）and energy dispersive spectrometer（EDS）.The results indicate that Cr-33Ta powders become homogeneous gradually and finally evolve into Cr（Ta）and Ta（Cr）supersaturated solid solutions

and the grain size of Ta and Cr is decreased and the microstrain of Ta and Cr is increased gradually with the increase of the ball milling time.The Cr-33Ta powders with sharp crushed-stone-like morphology are evolved steadily into the nearly spherical equiaxed particles by mechanical alloying

and the grain size of particles is refined obviously after 20hmilling

where average particle size is less than 5μm.The Ta and Cr mixed powders with nano-sized grains were achieved.