Member, American Ceramic Society.
Mechanical Properties of Interpenetrating Microstructures: The Al2O3/c-ZrO2 System
Article first published online: 11 JUL 2005
Journal of the American Ceramic Society
Volume 75, Issue 2, pages 418–423, February 1992
How to Cite
French, J. D., Chan, H. M., Harmer, M. P. and Miller, G. A. (1992), Mechanical Properties of Interpenetrating Microstructures: The Al2O3/c-ZrO2 System. Journal of the American Ceramic Society, 75: 418–423. doi: 10.1111/j.1151-2916.1992.tb08196.x
F. F. Lange-contributing editor
- Issue published online: 11 JUL 2005
- Article first published online: 11 JUL 2005
- Manuscript No. 196795, Received April 8, 1991; approved October 30, 1991.
- mechanical properties
Composites of Al2O3 (A) and cubic ZrO2 (Z) (8 mol% Y2O3) (with c-ZrO2 volume fractions ranging from O to 1) were fabricated by pressureless sintering of mechanically mixed powders. The microstructures of the AZ composites were duplex, with the grains of both phases exhibiting similar size. Room-temperature mechanical properties including Young's modulus (determined from elastic wave velocity measurements), strength and toughness (by indentation-strength-in-bending), and Vickers microhardness were evaluated for the full range of compositions. All properties exhibited a linear decrease with increasing c-ZrO2 content, and no R-curve behavior was seen in any of the composite compositions. Fracture morphology, observed from cracks emanating from microhardness indentations, changed from essentially intergranular for the tougher Al2O3 to transgranular for c-ZrO2, with AZ composites exhibiting mixed morphology.