Al_(70)Cu_(20)Fe_(10)合金微结构的XRD和XAFS研究  

Microstructures of mechanically alloyed Al_(70)Cu_(20)Fe_(10) studied by XRD and XAFS

作　　者：卞清[1] 王晓[1] 张明[1] 郝绿原[2] 

机构地区：[1]解放军理工大学理学院,江苏南京210007 [2]中国科学技术大学化学物理系,安徽合肥230029

出　　处：《解放军理工大学学报（自然科学版）》2007年第3期279-282,共4页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(10274077)

摘　　要：采用机械合金化MA(mechanical alloying)方法成功地制备了Al70Cu20Fe10纳米合金。在结构分析中,联合使用传统的XRD(X-ray diffraction)方法与新兴的XAFS(X-ray absorption fine structures)技术,使XRD的长程有序结构和XAFS的特定原子近邻环境两个方面的信息相互补充、互为印证,有效地克服了高度无序体系结构分析的困难。结果表明,机械合金化Al70Cu20Fe10(MA-10 h)合金中的化合物成分是体心四方结构的Al2Cu,Al70Cu20Fe10(MA-20 h和MA-40 h)合金中的化合物成分是简单立方结构的Cu9Al4。The nano-scale Al70Cu20Fe10 alloy was successfully prepared by mechanical alloying（MA）. Microstructure of milled products at different milling stages was characterized by X-ray diffraction （XRD） and X-ray absorption fine structures （XAFS）. The combination of both methods overcame the difficulties in the analysis of highly disordered structures. The results indicate that Al and Cu developed inter-metallic compound Al2Cu with body-centered tetragonal structure after 10 h milling and the inter-metallic compound Cu9Al4 with primitive cubic structure after milling up to 20 h or 40 h.

关 键 词：X射线衍射 X射线吸收精细结构 机械合金化 

分 类 号：TM271.3[一般工业技术—材料科学与工程]