Phonon Softening in Au–49.5 at%Cd Alloy
- 1 November 1994
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 33 (11B), L1631-1633
- https://doi.org/10.1143/jjap.33.l1631
Abstract
Phonon softening was observed in the parent phase of a AuCd alloy which transforms from the β2(B2) parent to ζ2 ′(trigonal) martensite at M s=304 K. Since Cd strongly absorbs neutrons, the isotope 114Cd was used in preparing the single crystal for the measurements. The [ζζ0]TA2( u//[1\bar0]) phonon branch was measured and found to be anomalously low. A minimum is present at ζ=0.35 which softens as M s approaches from above. The results are consistent with the model proposed by Ohba et al. [Materials Trans. JIM 33 (1992) 29] based upon a crystallographic study of the ζ2 ′ phase.Keywords
This publication has 16 references indexed in Scilit:
- New description of long period stacking order structures of martensites in β-phase alloysScripta Metallurgica et Materialia, 1993
- Neutron-scattering and electron-microscopy studies of the premartensitic phenomena in alloysPhysical Review B, 1991
- Symmetry-restricted anharmonicities and the CsCl-to-7R martensitic structural phase transformation of the systemPhysical Review B, 1989
- Observation of a soft-phonon mode and a pre-martensitic phase in the intermetallic compound Ti50Ni47Fe3studied by inelastic neutron scatteringJournal of Physics F: Metal Physics, 1984
- Dynamical properties of premartensitic NiTiJournal of Physics C: Solid State Physics, 1984
- Phonon softening inPhysical Review B, 1984
- Lattice dynamical study of the premartensitic state in CuZnAl alloyScripta Metallurgica, 1979
- Soft phonon mode at the martensitic phase transformation of AuCuZn2Solid State Communications, 1975
- On β AuCd martensitesMetallurgical Transactions, 1972
- The temperature dependence of the elastic constants of gold-cadmium alloysActa Metallurgica, 1956