Phase transitions in CsCl-type intemetallic compounds
Phase transitions in binary intermetallic compounds with the CsCl-type structure have been studied by a novel combination of high-temperature powder X-ray diffraction and Rietveld Landau theory of symmetry and phase transitions and the Gibbs-Knonvalow equation have been applied to understand the phase behavior of some systems with the CsCl-type structure. The nonstoichiometric compounds RhTi, NbRu, and RuTa with the CsCl-type structure at high temperature undergo thermal symmetry breaking transitions upon cooling. The transitions are first to the AuCu-type tetragonal, and taken to the orthorhombic NbRu-type with Cmmm symmetry. Alloys Ir-Ti which are titanium rich have the CsCl-type structure. This cubic structure transforms to the AuCu-type tetragonal structure and then to the NbRu-type structure with increasing atomic percent iridium. New partial phase diagrams for the composition ranges in near equiatomic MnAu, NbRu, and RuTa are also presented.
- Research Organization:
- Ames Lab., Ames, IA (United States)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 6884769
- Report Number(s):
- IS-T-1471; ON: DE90012446
- Resource Relation:
- Other Information: Thesis (Ph.D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
INTERMETALLIC COMPOUNDS
PHASE TRANSFORMATIONS
BOND LENGTHS
CESIUM CHLORIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
EQUILIBRIUM
GOLD ALLOYS
IRIDIUM ALLOYS
MANGANESE ALLOYS
NIOBIUM ALLOYS
PHASE DIAGRAMS
RHODIUM ALLOYS
RUTHENIUM ALLOYS
SAMPLE PREPARATION
TANTALUM ALLOYS
TITANIUM ALLOYS
VANADIUM BASE ALLOYS
X-RAY DIFFRACTION
ALKALI METAL COMPOUNDS
ALLOYS
CESIUM COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
COHERENT SCATTERING
DIAGRAMS
DIFFRACTION
DIMENSIONS
HALIDES
HALOGEN COMPOUNDS
LENGTH
PLATINUM METAL ALLOYS
SCATTERING
VANADIUM ALLOYS
360102* - Metals & Alloys- Structure & Phase Studies