Crystal Chemistry of Ceramic/Metal Systems.
Abstract
Robust models for predicting high temperature/pressure thermal expansion for a range of solids have been developed. The inter-relationships between several thermophysical properties including thermal expansion, specific heat, elastic properties, and self-diffusion of materials has been investigated. The role of defects on thermal expansion at high temperature and pressure has also been explored. During the course of the project several models for thermal expansion were developed extending earlier work of Reeber. The product of thermal expansion, bulk modulus, and volume has been shown to approach a constant at high temperatures for alkali halides, rare earth oxides, fcc metals, and ZnS. Models have been applied to investigate high temperature thermal expansion of alkali halides, rare earth oxides, group IV elements, fcc metals, bcc metals, SiC, III-V and II-VI compounds. Analytical expressions have been provided that represent the thermal expansion of these materials from near 0 K to the melting point. Models have also been extended to high pressure thermal expansion of MgO, NaCl, Group IV elements, and W. The bulk modulus and self-diffusion for W and Ta have been predicted to their melting points.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 16, 1997
- Accession Number
- ADA321521
Entities
People
- Robert R. Reeber
Organizations
- University of North Carolina at Chapel Hill