The change of d-electron occupancy in Ti-Ni solid-solution alloys measured by electron energy loss spectroscopy

W. G. Yang^1a and X. Zhang²

¹ Key Laboratory of Advanced Welding Technology, Department of Materials Science and Engineering, Jiangsu University of Science and Technology - Mengxi Road 2, 212003 Zhenjiang, China
² Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University Shuangqing Road 30, 100084 Beijing, China (b)

^a ywgjskd@163.com

Received: 31 December 2011
Accepted: 1 March 2012

Abstract

Pure Ti, pure Ni and some Ti-Ni solid-solution alloys have been studied by electron energy loss spectroscopy (EELS) and the d-electron occupancy of both Ti and Ni in the alloys has been calculated in terms of white-line intensity. It is found that after alloying the d-electron occupancy of Ti increases noticeably and the value is larger than 1, and the change of d-electron occupancy of Ni is very small. The change of d-electron occupancy is discussed in terms of charge transfer mechanism, local charge neutrality (LCN) approximation, and hybridization.