The 3d Electrons and Microdefects in Binary Ti-Al Alloys Studied by Positron Annihilation

Abstract:

The behavior of 3d electrons and microdefects in binary Ti-Al alloys with Al contents from 47at.% to 53at.% have been studied by coincidence Doppler broadening and positron lifetime techniques. It has been found that the 3d electron signals in the spectra of binary Ti-Al alloys increase with Ti content. In Al-rich Ti-Al alloys, on increasing Al content, the open volume of defect on grain boundary increases while the density of free electron decreases. On the contrary, in Ti-rich Ti-Al alloys, on increasing Ti content, the open volume of defect on grain boundary decreases, and the electron density of the grain boundary increases.

• Periodical: Advanced Materials Research (Volumes 399-401)
• Pages: 99-102
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.399-401.99
• Online since: November 2011
• Authors: Wen Deng, Xiao Lei Guo, Bing Xie, Ding Kang Xiong, Yu Yang Huang
• Keywords: 3d Electrons, Microdefects, Positron Annihilation, TiAl Alloys

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