Al//2O//3-ZrO//2 CERAMICS PREPARED FROM CVD POWDERS.

Saburo Hori, Masahiro Yoshimura, Shigeyuki Somiya, Ryoichi Takahashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

19 Citations (Scopus)

Abstract

The densification and tetragonal (t)-ZrO//2 content of sintered Al//2O//3-ZrO//2 ceramics were studied by starting from CVD ZrO//2 powder mixed with various Al//2O//3 powders, including CVD Al//2O//3, or from CV codeposited Al//2O//3-ZrO//2 powder. Strong dependence of t-ZrO//2 content on sintering temperature and on weight percent ZrO//2 in Al//2O//3-ZrO//2 ceramics suggested the importance of the ZrO//2 dispersion and grain-growth control for achieving higher t-ZrO//2 content. Comparisons of t-ZrO//2 contents measured on sintered and fractured surfaces indicated that the transformation-zone thicknesses on fracture were very large (4. 5-7. 8 mu m) with specimens prepared from CVD Al//2O//3 plus CVD ZrO//2 or from CV codeposited Al//2O//3-ZrO//2 probably due to extensive microcrack formation.

Original languageEnglish
Title of host publicationAdvances in Ceramics
EditorsNils Claussen, Manfred Ruehle, Arthur Harold Heuer
PublisherAmerican Ceramic Soc Inc
Pages794-805
Number of pages12
ISBN (Print)0916094642
Publication statusPublished - 1984 Dec 1

Publication series

NameAdvances in Ceramics
Volume12
ISSN (Print)0730-9546

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Chemical vapor deposition
Powders
Microcracks
Grain growth
Densification
Sintering
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Hori, S., Yoshimura, M., Somiya, S., & Takahashi, R. (1984). Al//2O//3-ZrO//2 CERAMICS PREPARED FROM CVD POWDERS. In N. Claussen, M. Ruehle, & A. H. Heuer (Eds.), Advances in Ceramics (pp. 794-805). (Advances in Ceramics; Vol. 12). American Ceramic Soc Inc.
Hori, Saburo ; Yoshimura, Masahiro ; Somiya, Shigeyuki ; Takahashi, Ryoichi. / Al//2O//3-ZrO//2 CERAMICS PREPARED FROM CVD POWDERS. Advances in Ceramics. editor / Nils Claussen ; Manfred Ruehle ; Arthur Harold Heuer. American Ceramic Soc Inc, 1984. pp. 794-805 (Advances in Ceramics).
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Hori, S, Yoshimura, M, Somiya, S & Takahashi, R 1984, Al//2O//3-ZrO//2 CERAMICS PREPARED FROM CVD POWDERS. in N Claussen, M Ruehle & AH Heuer (eds), Advances in Ceramics. Advances in Ceramics, vol. 12, American Ceramic Soc Inc, pp. 794-805.

Al//2O//3-ZrO//2 CERAMICS PREPARED FROM CVD POWDERS. / Hori, Saburo; Yoshimura, Masahiro; Somiya, Shigeyuki; Takahashi, Ryoichi.

Advances in Ceramics. ed. / Nils Claussen; Manfred Ruehle; Arthur Harold Heuer. American Ceramic Soc Inc, 1984. p. 794-805 (Advances in Ceramics; Vol. 12).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - The densification and tetragonal (t)-ZrO//2 content of sintered Al//2O//3-ZrO//2 ceramics were studied by starting from CVD ZrO//2 powder mixed with various Al//2O//3 powders, including CVD Al//2O//3, or from CV codeposited Al//2O//3-ZrO//2 powder. Strong dependence of t-ZrO//2 content on sintering temperature and on weight percent ZrO//2 in Al//2O//3-ZrO//2 ceramics suggested the importance of the ZrO//2 dispersion and grain-growth control for achieving higher t-ZrO//2 content. Comparisons of t-ZrO//2 contents measured on sintered and fractured surfaces indicated that the transformation-zone thicknesses on fracture were very large (4. 5-7. 8 mu m) with specimens prepared from CVD Al//2O//3 plus CVD ZrO//2 or from CV codeposited Al//2O//3-ZrO//2 probably due to extensive microcrack formation.

AB - The densification and tetragonal (t)-ZrO//2 content of sintered Al//2O//3-ZrO//2 ceramics were studied by starting from CVD ZrO//2 powder mixed with various Al//2O//3 powders, including CVD Al//2O//3, or from CV codeposited Al//2O//3-ZrO//2 powder. Strong dependence of t-ZrO//2 content on sintering temperature and on weight percent ZrO//2 in Al//2O//3-ZrO//2 ceramics suggested the importance of the ZrO//2 dispersion and grain-growth control for achieving higher t-ZrO//2 content. Comparisons of t-ZrO//2 contents measured on sintered and fractured surfaces indicated that the transformation-zone thicknesses on fracture were very large (4. 5-7. 8 mu m) with specimens prepared from CVD Al//2O//3 plus CVD ZrO//2 or from CV codeposited Al//2O//3-ZrO//2 probably due to extensive microcrack formation.

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Hori S, Yoshimura M, Somiya S, Takahashi R. Al//2O//3-ZrO//2 CERAMICS PREPARED FROM CVD POWDERS. In Claussen N, Ruehle M, Heuer AH, editors, Advances in Ceramics. American Ceramic Soc Inc. 1984. p. 794-805. (Advances in Ceramics).