Brillouin scattering and transmission electron microscopy studies of radiation-induced elastic softening, disordering, and amorphization of intermetallic compounds. [Zr/sub 3/Al]
Conference
·
OSTI ID:5370869
The crystalline-to-amorphous (c-a) phase transformation in the intermetallic compound, Zr/sub 3/Al, during room temperature bombardment with 1.0-MeV Kr/sup +/ has been investigated. Transmission electron microscopy and Brillouin scattering techniques were used to determine the lattice parameter and shear elastic constant as a function of the degree of long-range order. Results show that a large (approx.50%) elastic softening and dilatation strain (approx.3%) due to disordering precede the onset of amorphization. These results indicate that chemical disordering is an important driving force for the c-a transformation, and that the mechanism is an elastic shear instability. It is also shown that the volume dependence of the shear elastic constant associated with radiation-induced disordering and eventual amorphization is virtually identical to that associated with the heating to melting of many solids. The origin and implications of this parallelism between solid-state amorphization and melting are discussed. 21 refs., 6 figs.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5370869
- Report Number(s):
- CONF-8708104-6; ON: DE88005927
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
360106 -- Metals & Alloys-- Radiation Effects
ALLOYS
ALUMINIUM ALLOYS
AMORPHOUS STATE
ANNEALING
BRILLOUIN EFFECT
CHARGED PARTICLES
COHERENT SCATTERING
DAMAGE
ELASTICITY
ELECTRON MICROSCOPY
EQUATIONS
GLASS
HEAT TREATMENTS
INTERMETALLIC COMPOUNDS
IONS
KRYPTON IONS
LATTICE PARAMETERS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MELTING
MICROSCOPY
ORDER PARAMETERS
ORDER-DISORDER TRANSFORMATIONS
PHASE TRANSFORMATIONS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
SCATTERING
SHEAR PROPERTIES
TENSILE PROPERTIES
TRANSMISSION ELECTRON MICROSCOPY
ZIRCONIUM ALLOYS
360102* -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
360106 -- Metals & Alloys-- Radiation Effects
ALLOYS
ALUMINIUM ALLOYS
AMORPHOUS STATE
ANNEALING
BRILLOUIN EFFECT
CHARGED PARTICLES
COHERENT SCATTERING
DAMAGE
ELASTICITY
ELECTRON MICROSCOPY
EQUATIONS
GLASS
HEAT TREATMENTS
INTERMETALLIC COMPOUNDS
IONS
KRYPTON IONS
LATTICE PARAMETERS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MELTING
MICROSCOPY
ORDER PARAMETERS
ORDER-DISORDER TRANSFORMATIONS
PHASE TRANSFORMATIONS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
SCATTERING
SHEAR PROPERTIES
TENSILE PROPERTIES
TRANSMISSION ELECTRON MICROSCOPY
ZIRCONIUM ALLOYS