Formation of diffusionlessly transformed tetragonal phases in rapid quenching of ZrO                         
                        2
                                                 -Y                         
                        2
                                                 O                         
                        3
                                                  melts

Tatsuo Noma; Masahiro Yoshimura; Shigeyuki Sōmiya; Masaharu Kato; Mezame S. Yanagisawa; Hiroshi Seto

doi:10.1007/BF00547438

Formation of diffusionlessly transformed tetragonal phases in rapid quenching of ZrO ₂ -Y ₂ O ₃ melts

Tatsuo Noma, Masahiro Yoshimura, Shigeyuki Sōmiya, Masaharu Kato, Mezame S. Yanagisawa, Hiroshi Seto

Department of Materials Science and Engineering

Research output: Contribution to journal › Article

14 Citations (Scopus)

Abstract

ZrO ₂ polycrystals, partially stabilized by 2 to 7 mol% Y ₂ O ₃ , were arc-melted and rapidly quenched using an arc-imaging furnace with a hammer-anvil unit. Some of the specimens were further annealed at 1700° C for 3 h in air. The phases and the microstructures of these ZrO ₂ -Y ₂ O ₃ polycrystals were examined through X-ray diffraction and transmission electron microscopy. Special emphasis was placed upon the examination of the microstructure of the metastable tetragonal phase (t′ phase) which was formed by a diffusionless transformation of the high-temperature cubic phase. It was found that the t′ phase exhibits a twinned and mosaic structure made of alternating layers of twin-related variants. A comparison of the present experimental results with other related works has also been made.

Original language	English
Pages (from-to)	2689-2692
Number of pages	4
Journal	Journal of Materials Science
Volume	23
Issue number	8
DOIs	https://doi.org/10.1007/BF00547438
Publication status	Published - 1988 Jan 1

All Science Journal Classification (ASJC) codes

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1007/BF00547438

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Noma, T., Yoshimura, M., Sōmiya, S., Kato, M., Yanagisawa, M. S., & Seto, H. (1988). Formation of diffusionlessly transformed tetragonal phases in rapid quenching of ZrO ₂ -Y ₂ O ₃ melts Journal of Materials Science, 23(8), 2689-2692. https://doi.org/10.1007/BF00547438

Noma, Tatsuo ; Yoshimura, Masahiro ; Sōmiya, Shigeyuki ; Kato, Masaharu ; Yanagisawa, Mezame S. ; Seto, Hiroshi. / Formation of diffusionlessly transformed tetragonal phases in rapid quenching of ZrO ₂ -Y ₂ O ₃ melts In: Journal of Materials Science. 1988 ; Vol. 23, No. 8. pp. 2689-2692.

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title = " Formation of diffusionlessly transformed tetragonal phases in rapid quenching of ZrO 2 -Y 2 O 3 melts ",

abstract = " ZrO 2 polycrystals, partially stabilized by 2 to 7 mol% Y 2 O 3 , were arc-melted and rapidly quenched using an arc-imaging furnace with a hammer-anvil unit. Some of the specimens were further annealed at 1700° C for 3 h in air. The phases and the microstructures of these ZrO 2 -Y 2 O 3 polycrystals were examined through X-ray diffraction and transmission electron microscopy. Special emphasis was placed upon the examination of the microstructure of the metastable tetragonal phase (t′ phase) which was formed by a diffusionless transformation of the high-temperature cubic phase. It was found that the t′ phase exhibits a twinned and mosaic structure made of alternating layers of twin-related variants. A comparison of the present experimental results with other related works has also been made.",

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Noma, T, Yoshimura, M, Sōmiya, S, Kato, M, Yanagisawa, MS & Seto, H 1988, ' Formation of diffusionlessly transformed tetragonal phases in rapid quenching of ZrO ₂ -Y ₂ O ₃ melts ', Journal of Materials Science, vol. 23, no. 8, pp. 2689-2692. https://doi.org/10.1007/BF00547438

Formation of diffusionlessly transformed tetragonal phases in rapid quenching of ZrO ₂ -Y ₂ O ₃ melts . / Noma, Tatsuo; Yoshimura, Masahiro; Sōmiya, Shigeyuki; Kato, Masaharu; Yanagisawa, Mezame S.; Seto, Hiroshi.

In: Journal of Materials Science, Vol. 23, No. 8, 01.01.1988, p. 2689-2692.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Formation of diffusionlessly transformed tetragonal phases in rapid quenching of ZrO 2 -Y 2 O 3 melts

AU - Noma, Tatsuo

AU - Yoshimura, Masahiro

AU - Sōmiya, Shigeyuki

AU - Kato, Masaharu

AU - Yanagisawa, Mezame S.

AU - Seto, Hiroshi

PY - 1988/1/1

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N2 - ZrO 2 polycrystals, partially stabilized by 2 to 7 mol% Y 2 O 3 , were arc-melted and rapidly quenched using an arc-imaging furnace with a hammer-anvil unit. Some of the specimens were further annealed at 1700° C for 3 h in air. The phases and the microstructures of these ZrO 2 -Y 2 O 3 polycrystals were examined through X-ray diffraction and transmission electron microscopy. Special emphasis was placed upon the examination of the microstructure of the metastable tetragonal phase (t′ phase) which was formed by a diffusionless transformation of the high-temperature cubic phase. It was found that the t′ phase exhibits a twinned and mosaic structure made of alternating layers of twin-related variants. A comparison of the present experimental results with other related works has also been made.

AB - ZrO 2 polycrystals, partially stabilized by 2 to 7 mol% Y 2 O 3 , were arc-melted and rapidly quenched using an arc-imaging furnace with a hammer-anvil unit. Some of the specimens were further annealed at 1700° C for 3 h in air. The phases and the microstructures of these ZrO 2 -Y 2 O 3 polycrystals were examined through X-ray diffraction and transmission electron microscopy. Special emphasis was placed upon the examination of the microstructure of the metastable tetragonal phase (t′ phase) which was formed by a diffusionless transformation of the high-temperature cubic phase. It was found that the t′ phase exhibits a twinned and mosaic structure made of alternating layers of twin-related variants. A comparison of the present experimental results with other related works has also been made.

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Noma T, Yoshimura M, Sōmiya S, Kato M, Yanagisawa MS, Seto H. Formation of diffusionlessly transformed tetragonal phases in rapid quenching of ZrO ₂ -Y ₂ O ₃ melts Journal of Materials Science. 1988 Jan 1;23(8):2689-2692. https://doi.org/10.1007/BF00547438