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Journal of the Korean Ceramic Society 1997;34(2): 171. |
| $^{18}O$을 함유하는 X-TZP의 저온열화거동 |
| 김병국 |
| 한국과학기술연구원 세라믹스연구부 |
| Low Temperature Degradation Behavior of $^{18}O$-Containing Y-TZP |
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| ABSTRACT |
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It was experimentally identified, for the first time, that oxygen phonons play an important role in the low temperature degradation(tetragonallongrightarrowmonoclinic phase transformation) of yttria stabilized tetragonal zir-conia polycrystals (Y-TZP). The degradation accompanied by immersing the samples in the boiling water were markedly reduced by substituting of 18O for 16O in Y-TZP. This was attributed to the heavier mass of 18O which leads to the smaller probability to find oxygen atoms beyond certain critical displacements. |
| Key words:
Y-TZP, low temperature degradation, Martensitic transformation, Phonon, Isotopic exchange tech-nique, Raman spectra |
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