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J. Korean Ceram. Soc. > Volume 34(2); 1997 > Article
Journal of the Korean Ceramic Society 1997;34(2): 171.
$^{18}O$을 함유하는 X-TZP의 저온열화거동
한국과학기술연구원 세라믹스연구부
Low Temperature Degradation Behavior of $^{18}O$-Containing Y-TZP
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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