Mechanical Properties of Colloidally Processed Alumina with Cr2O3 and MnO2 Additives
Abstract
The effect of MnO2 and Cr2O3 additives on the microstructural evolution and mechanical properties of alpha-Al2O3 was investigated. In order to achieve a uniform distribution of the additives, submicron size alumina particles were coated with water soluble chromium and manganese acetates. Suspensions were freeze dried to process granules which were then used in the preparation of compacts by dry pressing and slip casting. Chromia, as a solid solution additive, inhibited grain growth. Excessive grain growth was observed with MnO2 additions. In both cases, a hardness increase was observed. Tensile strength increased with Cr2O3 and decreased with MnO2 doping. The results are correlated with the microstructural features.
Recommended Citation
H. Erkalfa et al., "Mechanical Properties of Colloidally Processed Alumina with Cr2O3 and MnO2 Additives," Third Ecers. Proc. 3rd European Ceramic Society Conf., pp. 549 - 553, Jan 1993.
Department(s)
Materials Science and Engineering
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Publication Date
1993-01-01
