Paper Title:
Position of Incommensurate Satellites Appearing in Ti-Ni Based Shape Memory Alloys
  Abstract

We have investigated electron diffraction patterns of a Ti-44Ni-6Fe alloy exhibitng a negative temperature dependence in electrical resistivity below Tmin = 210 K. The electron diffraction patterns taken near Tmin show diffuse satellites at gB2 + <zζ0>* when the zone axis is [111] and [001]. For both the beam directions, the value ζ is slightly smaller than 1/3. On the other hand, the satellites are missing when the zone axis is [110]. This means that the incommensurate phase has a modulated structure with the propagation vector <zζ0>* (ζ~1/3) and the displacement direction is one of <110> which is vertical to the propagation vector. This modulation is obviously the consequence of the phonon softening of TA2-branch with the propagation vector near <zζ0>* (ζ~1/3). In addition to the satellite at gB2 + <zζ0>* (ζ~1/3), satellites appear at gB2+<zζ0>* with ζ = 1/2 when the zone axis is [001] and rod-like steaks appear in <112>* direction when the zone axis is [110]. However, these satellites and rod-like streaks do not show clear temperature dependence, suggesting they are not directly related to the phonon softening of TA2-branch.

  Info
Periodical
Solid State Phenomena (Volumes 172-174)
Edited by
Yves Bréchet, Emmanuel Clouet, Alexis Deschamps, Alphonse Finel and Frédéric Soisson
Pages
150-154
DOI
10.4028/www.scientific.net/SSP.172-174.150
Citation
M. Todai, T. Fukuda, T. Kakeshita, "Position of Incommensurate Satellites Appearing in Ti-Ni Based Shape Memory Alloys", Solid State Phenomena, Vols. 172-174, pp. 150-154, 2011
Online since
June 2011
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: Hiroyuki Shimizu, Yutaka Doshida, Satoshi Tanaka, Keizo Uematsu
Abstract:Recently, we have developed crystal-oriented sheet forming (COSF) process from green sheet process and high-magnetic-field method. We formed...
21
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: Alexander V. Zarubin, Felix Kassan-Ogly, Alexey I. Proshkin
Chapter 2: Mathematical Modeling and Computer Simulation of Phase Transitions and Critical Phenomena
Abstract:We considered the Ising 1D chain in an external magnetic field taking into account the nearest and next-nearest interactions. By the method...
122