Effect of Y2O3 additions on the plasticity of sintered Cr2O3 |
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| Authors: | Wayne E. King J. -H. Park J. L. Routbort K. C. Goretta |
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| Affiliation: | (1) Materials Science Division, Argonne National Laboratory, 60439 Argonne, Illinois;(2) The Pennsylvania State University, 16802 University Park, Pennsylvania;(3) Present address: Chemistry and Materials Service Department, Lawrence Livermore National Laboratory, 94556 Livermore, California |
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| Abstract: | We have carried our constant strain-rate compression tests on polycrystalline Cr2O3 and Cr2O3 doped with 0.09 wt. % Y2O3 to establish whether there exists an effect of Y2O3 on the plasticity of Cr2O3. This study is motivated by previous work on the oxidation of alloys containing reactive-element additions. In that work, it has been observed that the addition of oxygen-active elements, such as Y to alloys that form Cr2O3 or Al2O3 oxide layers upon exposure at high temperature, strongly enhances the adhesion of the oxide layer to the base alloy as compared with alloys without reactive-element additions. We have found that at 1200°C (1) chromia exhibits limited plasticity at high temperatures, and (2) the presence of Y in the oxides does not enhance plasticity compared with addition-free oxides. |
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| Keywords: | Oxide plasticity Cr2O3 Y2O3 additions |
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