Browse > Article
http://dx.doi.org/10.4150/KPMI.2006.13.5.360

Effect of Grain Size and Heat-treating Atmosphere on the Phase Stability of Y-TZP  

Chung, Tai-Joo (School of Materials Science and Engineering, Andong National University)
Ahn, Seung-Su (Division of Research and Development, Korloy Inc.)
Song, Eun-Wha (School of Materials Science and Engineering, Andong National University)
Oh, Kyung-Sik (School of Materials Science and Engineering, Andong National University)
Lee, Jong-Sook (School of Materials Science and Engineering, Chonnam National University)
Kim, Young-Sik (School of Materials Science and Engineering, Andong National University)
Publication Information
Journal of Powder Materials / v.13, no.5, 2006 , pp. 360-365 More about this Journal
Abstract
The phase stability of tetragonal phase in Y-TZP was investigated in terms of the distribution of grain sizes and heat-treating atmosphere. Y-TZP with various grain sizes were prepared using duration time at $1600^{\circ}C$ as experimental parameter. Accumulated grain size distributions were built from the SEM micrographs and the amount of tetragonal phase were measured using XRD. Both results were compared to determine the critical grain size before and after heat-treatment in vacuum. The critical grain size drastically decreased compared with the small increase of average grain size due to the autocatalytic effect which critically affects the tetragonal to monoclinic phase transformation. After heat-treatment in reductive atmosphere critical grain size relatively increased due to the stabilization of tetragonal phase. The formation of oxygen vacancies during heat-treatment was ascribed to the increase of stability.
Keywords
Tetragonal phase; Critical grain size; Autocatalytic effect; Reductive atmosphere;
Citations & Related Records
연도 인용수 순위
  • Reference
1 F. F. Lange: J. Mater. Sci., 17 (1982) 225   DOI
2 I. Nettleship and R. Stevens: Int. J. High Technology Ceramics, 3 (1987) 1   DOI   ScienceOn
3 T.-J. Chung, H. Song, G.-H. Kim and D.-Y. Kim: J. Am. Ceram. Soc., 80 (1997) 2607   DOI   ScienceOn
4 N. Claussen, R. Wagner, L. J. Gauckler, and G. Petzow:J. Am. Ceram. Soc., 61 (1978) 369
5 R. C. Garvie and P. S. Nicholson: J. Am. Ceram., 55 (1972) 303   DOI
6 W. R. Cannon: Treatise on Materials Science and Technology 29 (1989) 195   DOI
7 E. E. Underwood: Quantitative Stereology, Addison-Wesley Publishing Company, Reading (1970)
8 G. Deghenghi, T.-J. Chung, V. Sergo: J. Am. Ceram. Soc., 86 (2003) 169   DOI   ScienceOn
9 T.-J. Chung, J.-S. Lee, D.-Y. Kim and H. Song: J. Am. Ceram. Soc., 82 (1999) 3193   DOI
10 T.-J. Chung, J.-S. Lee, D.-Y. Kim, G.-H. Kim, and H. Song: J. Am. Ceram. Soc., 84 (2001) 172   DOI   ScienceOn
11 H. Toraya, M. Yoshimura, and S. Smiya: J. Am. Ceram. Soc., 67 (1984) c119
12 K. Niihara, R. Morena, and D. P. H. Hasselmann: J. Mater. Sci. Lett., 1 (1982) 13   DOI
13 Y.-B. Cheng and D. P. Thompson: J. Mater. Sci. Lett., 9 (1990) 24   DOI
14 M. Rhle, N. Claussen, and A. H. Heuer: Science and Technology of Zirconia II, N. Claussen, M. Rhle, and A. H. Heuer (Ed.), Advances in Ceramics, Vol. 12 American Ceramic Society, Columbus, OH. (1984) 352
15 J.-S. Lee, J. Fleig, J. Maier, D.-Y. Kim, and T.-J. Chung:J. Am. Ceram. Soc., 88 (2005) 3067   DOI   ScienceOn