Load Dependence of Hardness in Sintered Submicrometer Al2O3 and ZrO2 |
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| Authors: | Andreas Krell |
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| Affiliation: | Fraunhofer-Institut für Keramische Technologien and Sinterwerkstoffe (IKTS), D-01277 Dresden, Germany |
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| Abstract: | Monolithic alumina bodies with a grain size of 0.5 μm and submicrometer tetragonal ZrO2 (3 mol% Y2O3) polycrystals were produced and investigated. With decreasing indentation load, the hardness increases but may again decrease below about 5 N; relevant measurements require the application of fairly high loads. Decreasing grain sizes increase the hardness of alumina and zirconia ceramics even for very small grain sizes in the submicrometer range. |
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