Journal article
The martensitic phase transition in NiTi
Hyperfine interactions, Vol.80(1), pp.995-998
03/1993
Handle:
https://hdl.handle.net/2376/122238
Abstract
The technique of perturbed angular correlation of gamma rays (PAC) was applied to study the martensitic phase transition of a shape-memory-effect alloy Ni49.9Ti50.1 doped with111In/Cd probe atoms. Spectra measured above and below the martensite starting temperature,M
s ≈ 340 K, exhibit quadrupole interactions of probes at cubic and noncubic lattice sites, consistent with the respective crystal structures. Unlike spectra measured belowM
s those measured above exhibit a large frequency distribution attributed to lattice displacement waves observed in diffraction studies. Analysis tentatively suggests that the waves are dynamic and not static. BelowM
s, at 290 K, a static quadrupole interaction was observed with coupling frequency ω1=34 Mrad/s and asymmetry parameter η=0.18, increasing to ω1=40.5 Mrad/s and η=0.34 at 77 K.
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Details
- Title
- The martensitic phase transition in NiTi
- Creators
- John Sy - Washington State UniversityGary Collins - Washington State University
- Publication Details
- Hyperfine interactions, Vol.80(1), pp.995-998
- Academic Unit
- Physics and Astronomy, Department of
- Publisher
- Springer International Publishing
- Identifiers
- 99900647238901842
- Language
- English
- Resource Type
- Journal article