Paper Title:
Self- and Impurity Diffusion in γ-TiAl Single Crystals
  Abstract

The diffusion coefficients of 44Ti, 63Ni and 59Fe in γ-TiAl single crystals have been measured by ion-beam sputter-sectioning technique, while those of In have been measured using ion implantation technique and secondary ion mass spectroscopy (SIMS) in order to clarify the diffusion anisotropy: the diffusion perpendicular and parallel to the [001] axis. The diffusion of Ti and In perpendicular to the [001] axis is faster than that parallel to the [001] axis. However, the diffusion anisotropies of Fe and Ni show opposite trend to those of Ti and In, namely the diffusion parallel to the [001] axis is faster than that perpendicular to the axis. The predominant process of diffusion perpendicular to the [001] axis has been discussed from a viewpoint of activation energy using the expression of the diffusion coefficients in L10-ordered alloys.

  Info
Periodical
Defect and Diffusion Forum (Volumes 258-260)
Edited by
Andreas Öchsner and José Grácio
Pages
259-269
DOI
10.4028/www.scientific.net/DDF.258-260.259
Citation
H. Nakajima, Y. Nose, T. Ikeda, "Self- and Impurity Diffusion in γ-TiAl Single Crystals", Defect and Diffusion Forum, Vols. 258-260, pp. 259-269, 2006
Online since
October 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Thomas M. Holden
Abstract:Hexagonal close-packed and lower symmetry metals often exhibit anisotropic mechanical properties because the dominant slip system forbids...
77
Authors: Liang Zhao, Ya Dong Gong, Guang Qi Cai
Abstract:The stiffness model of the parallel machine tool is established by static analysis, the static stiffness analysis is carried out through...
429
Authors: Wei Zhang, Mei Ling Yuan, Xian Yang Wang, Jun Ouyang
Chapter 6: Optical/Electronic/Magnetic Materials
Abstract:BaTiO3 (BTO) thin films were grown on (100) SrTiO3 (STO) single crystal substrates using the RF-magnetron sputtering...
926
Authors: Ya Xin Yu, Bin Zheng, Yuan Yuan Yang, Jia Hui Lin
Chapter 2: Mechanical Engineering, Manufacturing Technology and Application
Abstract:Preliminary tests found that super-rice seeds could be oriented by rolling them down with a guided plate. The rotation of the seed around the...
577
Authors: A.C. Xu, J.B. Chen, P.M. Zhang, J.J. Wu
Chapter 3: Other
Abstract:Human eyes is an imperfect imaging system that has various aberrations such as on axis and off axis aberrations, which often affect the...
183