首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Mössbauer study of incompletely alloyed nanocrystalline Fe100??? x Al x prepared by high energy ball milling
Authors:Varkey Sebastian  N Lakshmi  K Venugopalan
Institution:1. Department of Physics, Mohanlal Sukhadia University, Udaipur, 313001, India
2. Department of Physics, Nirmalagiri College, Kerala, 670701, India
Abstract:Mechanically alloyed Fe100???x Al x powders, with 20≤?x?≤90, have been studied by X-ray diffraction and room temperature 57Fe Mössbauer spectroscopy. The milling time was chosen such that complete alloying does not take place. For a fixed milling time of 10 h, the rate of alloying was seen to increase exponentially with increase in Fe content. Mössbauer spectra of all the samples consist of a broad magnetic sextet and a quadrupole doublet. The isomer shifts and quadrupole splitting of the doublets are typical of Al-rich, Fe–Al alloys. The area under the quadrupole doublet is a maximum for x?=?66. Analysis of the Mössbauer spectra indicates the formation off- stoichiometric Fe3Al phase for x?<?66, while the formation of Fe clusters is largely responsible for the magnetic hyperfine component in x?≥?66 compositions.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号