Effects of transient thermal shock loadings on the structure of zirconia ceramics
| Autor: | S P Buyakova, E A Derkach, S N Kulkov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Thermal shock
Materials science тепловые нагрузки рентгеновское рассеяние Mineralogy Microstructure циркониевая керамика фазовые составы Tetragonal crystal system Phase (matter) фазовые превращения Cubic zirconia Grain boundary Crystallite Composite material микроструктуры Monoclinic crystal system ударные нагрузки |
| Popis: | In this paper the influence of thermal shock loadings on the phase composition and microstructure of ZrO[2](Y[2]O[3]) and ZrO[2](MgO) ceramics was studied. It was found that thermal shock strains were no effect on phase composition of ZrO[2](Y[2]O[3]) ceramics. Reducing the concentration of high-temperature tetragonal t-ZrO[2] and cubic c-ZrO[2] modifications and rising the content of low-temperature monoclinic m-ZrO[2] crystal system with increasing the number of thermal shock strains were observed. The values of region coherent X-ray scattering of ZrO[2](Y[2]O[3]) ceramics didn't changed, while the crystallite size of ZrO[2](MgO) ceramics decreased. The formation of block structure in all studied ceramics was observed, the sizes of the blocks formed in the ZrO[2](Y[2]O[3]) and ZrO[2](MgO) ceramics were slightly different. The formation of the blocks in ZrO[2](Y[2]O[3]) ceramics occurred on the grain boundaries, while the crystallites in ZrO[2](MgO) ceramics were crushed due to phase transformation. |
| Databáze: | OpenAIRE |
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