Effects of Texture and Grain Boundary Microstructures on High Temperature Deformation of Textured Alumina

• Project/Area Number: 19760497
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Structural/Functional materials
• Research Institution: National Institute for Materials Science
• Principal Investigator: MORITA Koji National Institute for Materials Science, ナノセラミックスセンター, 主幹研究員 (20354186)
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥3,800,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥600,000); Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2007: ¥1,200,000 (Direct Cost: ¥1,200,000)
• Keywords: セラミックス / アルミナ / 高温変形 / 配向組織 / 粒界構造 / 粒内塑性 / 粒界すべり / 拡散クリープ

Research Abstract

This study was performed to examine the effect of the texture and grain boundary structures on the high-temperature flow behavior of textured alumina (τ-Al_2O_3) polycrystals. The flow behavior of the textured τ-Al_2O_3 depends on the angle ￡pbetween the tensile direction and the c-plane. The textured τ-Al_2O_3 with ￡p= 45° deforms at several times higher strain rate than that of the non-textured τ-Al_2O_3. The enhanced strain rate can be related to relaxation caused by the c-plane plastic flow.

Research Products

• [Journal Article] Fabrication of high-strength transparent MgAl2O4 spinel polycrystals by optimizing spark-plasma-sintering (SPS) conditions (2009)
  • Author(s): K. Morita, K. Hiraga, B. -N. Kim, H. Yoshida
  • Journal Title: J. Mater. Res. 24 Pages: 2863-2872
  • Peer Reviewed
• [Journal Article] Spark-Plasma-Sintering(SPS) Condition Optimization for Producing Transparent MgAl2O4 Spinel Polycrystal (2009)
  • Author(s): K. Morita, K. Hiraga, B. -N. Kim, H. Yoshida
  • Journal Title: J. Am. Ceram. Soc. 92 Pages: 1208-1216
  • Peer Reviewed
• [Journal Article] Laser-assisted atom probe analysis of zirconia/spinel nanocomposite ceramics (2009)
  • Author(s): Y.M.Chen, T.Ohkubo, M.Kodzuka, K.Morita, K.Hono
  • Journal Title: Scripta Materialia 61 Pages: 693-696
  • Peer Reviewed
• [Journal Article] Fabrication of high-strength transparent MgAl_2O_4 spinel polycrystals by optimizing shark-plasma-sintering(SPS)conditions (2009)
  • Author(s): K.Morita, B.-N.Kim, H.Yoshida, K.Hiraga
  • Journal Title: J.Mater.Res. 29 Pages: 2863-2872
  • Peer Reviewed
• [Journal Article] Spark-Plasma-Sintering(SPS)Condition Optimization for Producing Transparent MgAl_2O_4 Spinel Polycrystal (2009)
  • Author(s): K.Morita, B.-N.Kim, H.Yoshida, K.Hiraga
  • Journal Title: J.Am.Ceram.Soc. 92 Pages: 1208-1216
  • Peer Reviewed
• [Journal Article] Bulk Processing of Nanocrystalline ZrO2 Powders and Mechanical Properties of the Processed Bulk Nanocomposites (2009)
  • Author(s): Koji Morita
  • Journal Title: Proc. of The 15 Int. Symposium on Plasticity 2009 and its current applications(Plasticity2009) Pages: 409-411
  • Peer Reviewed
• [Journal Article] Fabrication of Transparent MgAl2O4 spinel polycrystal by Spark-Plasma-Sintering Processing (2008)
  • Author(s): K. Morita, B. -N. Kim, K. Hiraga, H. Yoshida
  • Journal Title: Scripta Mater. 58 Pages: 1114-1117
  • Peer Reviewed
• [Journal Article] Synthesis of High Strength Transparent MgAl2O4 Spinel Polycrystals by Spark-Plasma-Sintering Technique (2008)
  • Author(s): K. Morita, B. -N. Kim, H. Yoshida, K. Hiraga
  • Journal Title: Proc. of 2nd Inter. Congress on Ceramics (ICC2) 1
  • Peer Reviewed
• [Journal Article] Fabrication of Transparent MgAl2O4 spinel polycrystal by Spark-Plasma-Sintering Processing (2008)
  • Author(s): Koji Morita
  • Journal Title: Scripta Materialia 58 Pages: 1114-1117
  • Peer Reviewed
• [Journal Article] Synthesis of High Strength Transparent MgAl2O4 Spinel Polycrystals by Spark-Plasma-Sintering Technique (2008)
  • Author(s): Koji Morita
  • Journal Title: Proc. of 2nd Int. Congress on Ceramics (ICC2) Pages: 1-9
  • Peer Reviewed
• [Journal Article] Microstructural examination in high-strain-rate superplastically deformed tetragonal ZrO2 dispersed with 30vol% MgAl2O4 spinel (2007)
  • Author(s): K. Morita, K. Hiraga, B. -N. Kim, Y. Sakka
  • Journal Title: J. Mater. Res. 22 Pages: 801-813
  • Peer Reviewed
• [Journal Article] High-strain-rate superplastic flow in tetragonal ZrO2 polycrystal enhanced by the dispersion of 30vol% MgAl2O4 spinel particles (2007)
  • Author(s): K. Morita, K. Hiraga, B. -N. Kim
  • Journal Title: Acta Mater. 55 Pages: 4517-4526
  • Peer Reviewed
• [Journal Article] Superplasticity of Nanocrystalline ZrO2-Spinel Composite (2007)
  • Author(s): K. Morita, K. Hiraga, B. -N. Kim
  • Journal Title: Key Eng. Mater. 345-346 Pages: 573-576
  • Peer Reviewed
• [Journal Article] Fabrication of Nanocrystalline Superplastic ZrO2 ceramics (2007)
  • Author(s): K. Morita, K. Hiraga, B. -N. Kim, H. Yoshida, Y. Sakka
  • Journal Title: Mat. Sci. Forum 551-552 Pages: 491-496
  • Peer Reviewed
• [Journal Article] Microstructulal examination in high-strain-rate superplastically deformed tetragonal ZrO_2 dispersed with 30vol% MgAl_2O_4 spinel (2007)
  • Author(s): Koji Morita
  • Journal Title: Journal of Materials Research 22 Pages: 801-813
  • Peer Reviewed
• [Journal Article] High-strain-rate superplastic flow in tetragonal ZrO_2 polycrystal enhanced by the dispersion of 30vol% MgAl_2O_4 spinel particles (2007)
  • Author(s): Koji Morita
  • Journal Title: Acta Materialia 55 Pages: 4517-4526
  • Peer Reviewed
• [Journal Article] Superplasticity of Nanocrystalline ZrO_2-Spinel Composite (2007)
  • Author(s): Koji Morita
  • Journal Title: Key Engineering Materials 345-346 Pages: 573-576
  • Peer Reviewed
• [Journal Article] Fabrication of Nanocrystalline Superplastic ZrO_2 ceramics (2007)
  • Author(s): Koji Morita
  • Journal Title: Materials Science Forum 551-552 Pages: 491-496
  • Peer Reviewed
• [Journal Article] High-Strain-Rate Superplasticity in ZrO_2-30vol% MgAl_2O_4 Spinel Composite (2007)
  • Author(s): Koji Morita
  • Journal Title: Proc. of the 24th International Japan-Korea Seminar on Ceramics 345-346 Pages: 245-248
  • Peer Reviewed
• [Presentation] 微細粒を有する透光性スピネル多結晶体の創製 (2009)
  • Author(s): 森田孝治, 金炳男, 吉田英弘, 平賀啓二郎
  • Organizer: 日本金属学会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-24
• [Presentation] 放電プラズマ焼結法による高強度透光性MgAl2O4スピネルの創製 (2009)
  • Author(s): 森田孝治, 金炳男, 吉田英弘, 平賀啓二郎
  • Organizer: 日本セラミックス協会第22回秋季シンポジウム
  • Place of Presentation: 愛媛大学, 松山市
  • Year and Date: 2009-09-17
• [Presentation] Spark-Plasma-Sintering of High Strength Transparent Spinel Polycrystals (2009)
  • Author(s): 森田孝治、金嫡男、吉田英弘、平賀啓二郎
  • Organizer: PMP-III札幌分科会2009
  • Place of Presentation: 北海道大学
  • Year and Date: 2009-09-07
• [Presentation] High Strength Transparent MgAl2O4 Spinel Fabricated by Low Heating Rate Spark-Plasma-Sintering (SPS) Processing (2009)
  • Author(s): K. Morita, K. Hiraga, B. -N. Kim, H. Yoshida
  • Organizer: 15th International Conference on the Strength of Materials
  • Place of Presentation: Technische Universitat Dresden, 独国
  • Year and Date: 2009-08-17
• [Presentation] High Strength Transparent MgAl_2O_4 Spinel Fabricated by Low Heating Rate Spark-Plasma-Sintering(SPS)Processing (2009)
  • Author(s): 森田孝治, 平賀啓二郎, 金柄男, 吉田英弘
  • Organizer: 15th International Conference on the Strength of Materials
  • Place of Presentation: Technische Universitat Dresden, 独国
  • Year and Date: 2009-08-17
• [Presentation] 放電プラズマ焼結(SPS)法を用いた微細粒スピネルの創製 (2009)
  • Author(s): 森田孝治、金柄男、吉田英弘、平賀啓二郎
  • Organizer: 「第139回超塑性研究会」と「金属学会・先進材料の高温強度と組織研究会」共催
  • Place of Presentation: 神戸市・有馬温泉
  • Year and Date: 2009-08-09
• [Presentation] High-Strain-Rate Superplastic Flow Mechanism in ZrO2-30vol% Spinel Two-Phase Composite (2009)
  • Author(s): K. Morita, K. Hiraga, B. -N. Kim, H. Yoshida
  • Organizer: ICSMA2009
  • Place of Presentation: Bell Harbor Int. ConferenceCenter, シアトル, 米国
  • Year and Date: 2009-06-30
• [Presentation] High-Strain-Rate Superplastic Flow Mechanism in ZrO_2-30vol% Spinel Two-Phase Composite (2009)
  • Author(s): 森田孝治, 平賀啓二郎, 金柄男, 吉田英弘
  • Organizer: ICSMA2009
  • Place of Presentation: Bell Harbor Int.ConferenceCenter, シアトル, 米国
  • Year and Date: 2009-06-30
• [Presentation] Densification of Fine-Grained Transparent MgAl2O4 spinel using Spark-Plasma-Sintering (SPS) Technique (2009)
  • Author(s): K. Morita, K. Hiraga, B. -N. Kim, H. Yoshida
  • Organizer: 10th Intl. Conf. and Exhibition of the Euro Ceram Soc.
  • Place of Presentation: Auditorium Maximum, Krakow, Poland
  • Year and Date: 2009-06-23
• [Presentation] DENSIFICATION OF FINE-GRAINED TRANSPARENT MgAl_2O_4 SPINEL USING SPARK-PLASMA-SINTERING(SPS)TECHNIQUE (2009)
  • Author(s): 森田孝治, 平賀啓二郎, 金柄男, 吉田英弘
  • Organizer: 10th Intl.Conf.and Exhibition of the Euro Ceram Soc.
  • Place of Presentation: Auditorium Maximum, Krakow, Poland
  • Year and Date: 2009-06-23
• [Presentation] Spark-Plasma-Sintering (SPS) Processing of High Strength Transparent MgAl2O4 Spinel Polycrystals (2009)
  • Author(s): K. Morita, K. Hiraga, B. -N. Kim, H. Yoshida
  • Organizer: PACRIM8
  • Place of Presentation: Hilton Hotel, Vancouver, Canada
  • Year and Date: 2009-06-03
• [Presentation] Spark-Plasma-Sintering(SPS)Processing of High Strength Transparent MgAl_2O_4 Spinel Polycrystals (2009)
  • Author(s): 森田孝治, 平賀啓二郎, 金柄男, 吉田英弘
  • Organizer: PACRIM8, American Ceramics Society
  • Place of Presentation: Hilton Hotel, Vancouver, Canada
  • Year and Date: 2009-06-03
• [Presentation] Bulk Processing of Nanocrystalline ZrO2 Powders and Mechanical Prorerties of the Processed Bulk Nanocomposites (2009)
  • Author(s): Koji Morita
  • Organizer: The 15 Int. Symposium on Plasticity 2009 and its current aoDlications(Plasticitv2009)
  • Place of Presentation: USA・St. Thomas
  • Year and Date: 2009-01-03
• [Presentation] Fabrication of Fine-Grained Transparent MgAl2O4 spinel Polycrystal using Spark-Plasma-Sintering Techni que (2008)
  • Author(s): K. Morita, K. Hiraga, B. -N. Kim, H. Yoshida
  • Organizer: IUMRS Inter. Conference in Asia 2008
  • Place of Presentation: 名古屋国際会議場
  • Year and Date: 2008-12-12
• [Presentation] Fabrication of Fine-Grained Transparent MgAl2O4 Spinel Polycrystal Using Spark-Plasma- Sintering Technique (2008)
  • Author(s): Koji Morita
  • Organizer: IUMRS International Conference in Asia 2008
  • Place of Presentation: 名古屋国際会議場
  • Year and Date: 2008-12-12
• [Presentation] 微細粒を有する透光性スピネル多結晶体の創製 (2008)
  • Author(s): 森田孝治
  • Organizer: 日本金属学会
  • Place of Presentation: 熊本大学
  • Year and Date: 2008-09-24
• [Presentation] 透光性スピネル創製のための最適放電プラズマ焼結条件の検討 (2008)
  • Author(s): 森田孝治
  • Organizer: セラミックス協会
  • Place of Presentation: 北九州国際会議場
  • Year and Date: 2008-09-18
• [Presentation] Synthesis of High Strength Transparent MgAl2O4 Spinel Polycrystals by Spark-Plasma-Sintering Technique (2008)
  • Author(s): K. Morita, K. Hiraga, B. -N. Kim, H. Yoshida
  • Organizer: 2nd International Congress on Ceramics (ICC2)
  • Place of Presentation: Verona, Italy
  • Year and Date: 2008-06-03
• [Presentation] Synthesis of High Strength Transparent MgAl2O4 Spinel Polycrystals by Spark-Plasma-Sintering Technique (2008)
  • Author(s): Koji Morita
  • Organizer: 2nd International Congress on Ceramics(ICC2)
  • Place of Presentation: Italy・Verona
  • Year and Date: 2008-06-03
• [Presentation] High-Strain-Rate Superplastic ZrO_2-30vol% Spinel Composite (2008)
  • Author(s): Koji Morita
  • Organizer: 10th International Conference and Exhibition of European Ceramics Society
  • Place of Presentation: Kailua-Kona, Hawaii
  • Year and Date: 2008-01-05
• [Presentation] High-Temperature Flow Behavior of Textured Alumina Ceramics (2007)
  • Author(s): Koji Morita
  • Organizer: 24th International Japan-Korea Seminar on Ceramics
  • Place of Presentation: ヤマハリゾートつま恋静岡県掛川市、日本
  • Year and Date: 2007-11-22
• [Presentation] 配向性アルミナ多結晶体の高温変形挙動 (2007)
  • Author(s): 森田孝治・鈴木達・吉田英弘・金炳男・平賀啓二郎・目義雄
  • Organizer: 日本セラミックス協会第20回秋季シンポジウム
  • Place of Presentation: 名古屋工業大学, 名古屋市
  • Year and Date: 2007-09-12
• [Presentation] 配向性アルミナ多結晶体の高温変形挙動 (2007)
  • Author(s): 森田 孝治
  • Organizer: 日本セラミックス協会第20回秋季シンポジウム
  • Place of Presentation: 名古屋工業大学名古屋市、日本
  • Year and Date: 2007-09-12
• [Presentation] High-Temperature Flow Behavior of Textured Alumina Ceramics (2007)
  • Author(s): K. Morita, T.S. Suzuki, H. Yoshida, B. -N. Kim, K. Hiraga, Y. Sakka
  • Organizer: 10th Inter. Conference and Exhibition of Euro. Ceram. Soc.
  • Place of Presentation: Estrel Convention Center Berlin, Germany
  • Year and Date: 2007-06-19
• [Presentation] High-Temperature Flow Behavior of Textured Alumina Ceramics (2007)
  • Author(s): Koji Morita
  • Organizer: 10th International Conference and Exhibition of European Ceramics Society
  • Place of Presentation: Estrel Convention Center Berlin, Germany
  • Year and Date: 2007-06-19
• [Presentation] Superplasticity of Nanocrystalline ZrO2-Spinel Composite (2007)
  • Author(s): K. Morita, K. Hiraga, B. -N. Kim, H. Yoshida
  • Organizer: 10th International Conference on the Mechanical Behavior of Materials (ICM10)
  • Place of Presentation: 釜山、韓国
  • Year and Date: 2007-05-29
• [Presentation] Superplasticity of Nanocrystalline ZrO_2-Spinel Composite (2007)
  • Author(s): Koji Morita
  • Organizer: 10th International Conference on the Mechanical Behavior of Materials (ICM10)
  • Place of Presentation: 釜山、韓国
  • Year and Date: 2007-05-29
• [Remarks]
  • URL: http://www.nims.go.jp/kouyuuten/morita.html