Interface Phenomena in Metal-Ceramic Composites
Abstract
This report describes theoretical and experimental results that link the properties of the heterointerface to the macroscopic mechanical behavior of metallic composites where the continuous phase is a metal and the hard phase is a ceramic (MMCs) or an intermetallic (IMCs). The results emphasize that the properties of the composites depend on the interaction between cohesive strength of the M/C or M/I interface and the physical microstructural scale of the metal. This result is general and is expected to apply from room temperature properties such as toughness, to creep resistance at very high temperatures. At room temperature the effect of scale is based on the dislocation pile-up model for delamination at the interface. At high temperatures the climb rate of dislocations in the metal layer depends on its width and on the pinning efficiency of lattice dislocations at the interface. Interfaces, MMC, Intermetallics, Oxidation, Grain boundary sliding, Composites, Fracture.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 27, 1993
- Accession Number
- ADA274167
Entities
People
- Rishi Raj
Organizations
- Cornell University