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。
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.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2014年第1期9-12,共4页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(51161020)
江西省自然科学基金资助项目(20114BAB216012)
江西省教育厅青年科学基金资助项目(GJJ10179)
南昌航空大学研究生创新基金资助项目(YC2012008)
