Soft mode behavior in Ni--Al alloys

Conference · Wed Jun 01 00:00:00 EDT 1988

OSTI ID:6911187

Shapiro, S M; Yang, B X; Shirane, G; Larese, J Z; Tanner, L E; Moss, S C

Inelastic neutron scattering experiments performed on carefully prepared single crystals of Ni/sub x/Al/sub 1/minus/x/ (x /equals/ 50, 58, 62.5 at. percent) reveal an anomaly in the //zeta//zeta/0)-TA mode whose position in /zeta/ depends linearly on x. The temperature dependent studies of the 62.5/percent/ alloy show marked softening of the phonon energy at /zeta/ /equals/ 1/6. At the same temperatures, an elastic central peak develops. At T/sub M/ /equals/ 80K a new structure develops which exhibits a modulation at nearly, but not exactly, /zeta/ /equals/ 1/7. 11 refs., 2 figs.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6911187
• Report Number(s): BNL-41469; CONF-880715-5; ON: DE88015195
• Resource Relation: Conference: 4. international conference on neutron scattering (ICNS '88), Grenoble, France, 12 Jul 1988; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
PHASE TRANSFORMATIONS
NICKEL BASE ALLOYS
MARTENSITE
MONOCRYSTALS
NEUTRON DIFFRACTION
TEMPERATURE DEPENDENCE
ALLOYS
CARBON ADDITIONS
COHERENT SCATTERING
CRYSTALS
DIFFRACTION
IRON ALLOYS
NICKEL ALLOYS
SCATTERING
360102* - Metals & Alloys- Structure & Phase Studies