A stabilization mechanism of M2O3c-type rare earth tetragonal stabilized ZrO2 via co-decomposition
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Evidence was obtained that c-type rare earth M2O3 stabilized ZrO2 in the tetragonal phase via oxygen coordination between the M2O3 molecule and the ZrO2 unit cell. The ratio for 100% stabilization was calculated to be 2.7 mol% M2O3 stabilizer. This was experimentally proved by using the co-decomposition process to obtain 100% tetragonal stabilization efficiency. It has also been established that stabilization is dependant upon the average Zr-O bond length of 226 pm as a parameter and not necessarily of an exact radius varying between 206 pm and 246 pm.
KeywordsOxygen Polymer Bond Length Rare Earth Material Processing
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- 2.P. H. Rieth, J. S. Reed and A. W. Naumann, Bull. Am. Ceram. Soc. 55 (1976) 717.Google Scholar
- 3.T. K. Gupta, Science of Sintering 10 (1978) 205.Google Scholar
- 6.M. A. C. G. Van De Graff and A. J. Burggraaf, in Advances in Ceramics, Science and Technology of 'zirconia II, edited by N. Claussen, M. Rihle and A. M. Heuer. (Amer. Ceram. Soc., Ohio, 1984) 12, p. 744.Google Scholar
- 12.G. Pretorius, SA Patent Application No. 92/7315, 1992, South Africa.Google Scholar