Fracture toughness and strength of 96% alumina
- Nuclear Metals Inc., Concord, MA (United States)
- Elkem Metals Inc., Marietta, OH (United States)
- Coors Ceramics Co., Golden, CO (United States)
- Golden Technologies Co., Golden, CO (United States)
- Colorado School of Mines, Golden, CO (United States). Dept. of Materials and Metallurgical Engineering
There exists a need to understand the controlling factors that simultaneously impact strength and toughness in 96% alumina. The enhancement of both strength and toughness enables designers to extend the use limits and reliability for structural ceramics. This article presents mechanical property results from a group study examining the use of different alkaline-earth aluminosilicate intergranular compositions containing magnesium, calcium and strontium oxides (RO) in 96% alumina. Principal results address trends in indentation strength toughness and modulus of rupture. Trends in the data are presented relative to existing theories of thermal expansion mismatch toughening, grain-bridging crack-wake effect and crack deflection mechanisms. Strength is addressed in terms of strength after indentation, crack growth of indentation flaws and Weibull characterization for the strength distribution.
- OSTI ID:
- 509244
- Journal Information:
- American Ceramic Society Bulletin, Journal Name: American Ceramic Society Bulletin Journal Issue: 5 Vol. 76; ISSN 0002-7812; ISSN ACSBA7
- Country of Publication:
- United States
- Language:
- English
Similar Records
Processing and characterization of SiC-whisker-reinforced alumina-matrix composites
Effect of temperature on toughness curves in alumina