Combustion synthesis/densification of ceramics and ceramic composites. (Reannouncement with new availability information)
Combustion synthesis followed by densification was utilized in producing monolithic TiC and TiB2 materials, and TiC-Ni, TiB2-Ni, TiB2-Al2O3, and TiB2SiC ceramic composites. Static and dynamic densification equipments were developed with the loading applied immediately after the synthesis reaction was completed and the ceramic/composite was ductile. All the ceramics exhibited an equiaxed grain structure with alternating regions at high and low dislocation densities, indicating that recovery/recrystallization mechanisms are prevalent. The grain boundaries were, as far as could be established, devoid of impurities and second phases. Quasi-static and dynamic mechanical testing were performed and revealed that the materials exhibited strength levels comparable to conventionally produced materials. Instrumented densification experiments were conducted and a temperature-dependent consitutive model was applied for plastic deformation of the porous combustion synthesis product.
- Research Organization:
- California Univ., San Diego, CA (United States)
- OSTI ID:
- 200130
- Report Number(s):
- AD-A-263811/2/XAB; CNN: Contract DAAL03-88-K-0194; TRN: 60510572
- Resource Relation:
- Other Information: PBD: 2 Sep 1992
- Country of Publication:
- United States
- Language:
- English
Similar Records
A comparison of reaction vs convectionally hot-pressed ceramic composites
Combustion synthesis of TiC-based materials: Mechanisms, densification, and properties