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PLASMA-SPARK PROCESS FOR MULLITE-ZIRCONIUM CERAMICS
https://doi.org/10.17073/1683-4518-2014-4-33-38
Abstract
The results of evolution of crystal phases, apparent density, caking index, Vickers hardness number, ultimate strength in compression, linear correlation between caking index and mechanical features (Vickers hardness number and ultimate strength in compression) are shown in the article for the mullite-zirconium ceramics obtained by means of plasma-spark sinteringwith Y2O3 additions in temperature range of 1250-1450 °C both without clay and with clay additions. The clay addition to the sintering initial component mixture promotes the intense mullitization, whereas the Y2O3 addition provides the intense solid cubic ZrO2 solution formation in the obtained samples in the temperature range of 1250-1450 °C. The clay addition to the sintering initial component mixture allows to obtain the samples with maximal values of both apparent density and caking index. This determinates the greater values of both Vickers hardness number and ultimate strength in compression comparing to the samples obtained only with Y2O3 addition. The linear correlation between caking index and mechanical features is mostly noticeable in the samples obtained out of sintered component mixture without clay addition. Ill. 8. Ref. 14. Tab. 2.
About the Author
A. V. HmelovLatvia
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Supplementary files
For citation: Hmelov A.V. PLASMA-SPARK PROCESS FOR MULLITE-ZIRCONIUM CERAMICS. NOVYE OGNEUPORY (NEW REFRACTORIES). 2014;(4):33-38. https://doi.org/10.17073/1683-4518-2014-4-33-38
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