| Studies on Zirconia Dispersed Alumina Ceramics |
P. Y. DALVI AND D. D. UPADHYAYA
Pages : 21-25
DOI : 10.1080/0371750X.1990.10822983 |
| Abstract |
| The incorporat~on of Zr02 in Al~ 3 matrix was performed by conventional
mechanical mixing and co-precipitation methods. The densification
behaviour on sintering up to 1800°C and the resulting microstructural
features of these ceramics have been studied. In either case
no appreciable densification was noticed up to l600°C. The coprecipitated
powder compacts containing 20% Zr02 after sintering
at 1700°C achieved the density of 4.14 gm.cm-3 and open porosity
about 3.0 %· Microstructural features showed a pronounced grain
growth inhibition effect with increasing concentration of Zr02•
Vacuum hot-pressing was found to be beneficial from the point of
view of densification and mechanical properties of these compacts. |
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