Structural Design and processing of Laminated Fiber-reinforced Ceramic Matrix Composites

1997 Fiscal Year Final Research Report Summary

• Project/Area Number: 07555482
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 展開研究
• Research Field: Inorganic materials/Physical properties
• Research Institution: Kagoshima University
• Principal Investigator: HIRATA Yoshihiro Kagoshima University, Faculty of Engineering, Professor, 工学部, 教授 (80145458)
• Co-Investigator(Kenkyū-buntansha): KAJI Masaki Kyocera Corporation, R & D Center, Kagoshima, Section Manager, 総合研究所, 課責任者 ; INAGAKI Masahiro Kyocera Corporation, R & D Center, Kagoshima, Section Manager, 総合研究所, 課責任者 ; KOGA Kazunori Kyocera Corporation, R & D Center, Kagoshima, General Manager, 総合研究所, 所長 ; NAKAMURA Yuzo Kagoshima University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (40198247)
• Project Period (FY): 1995 – 1997
• Keywords: Si-Ti-C-O fiber / Mullite / Laminated Composites / Hot-pressing / Microstructure / Mechanical Properties / Polytitanocarbosilane / ポリチタノカルボシラン

Research Abstract

A sol-gel-processed mullite powder and Si-Ti-C-O fiber woven fabrics were formed into laminated composites by filtration or doctor blade method using aqueous mullite suspensions containing polyacrylic ammonium and methyl cellulose at pH 8.5. The laminate green composites with 6 and 10 vol% fabrics were hot-pressed to near full density at 1500ﾟ-1650ﾟC for 1h under a pressure of 39 MPa in a N2 atmosphere. Graphite layrs of about 10 nm thickness and TiC particles of 0.1-0.2 mum were produced at the interfaces between fibers and matrix after hot-pressing at 1650ﾟC.beta-SiC and TiC particles of 10-30 nm and graphite phase with short cycle structure were recognized in the fibers. These results indicate that the crystallization of fibers progresses with formation of the amorphous phase in fiber. The EDS quantification of the fibers indicated that the fibers pyrolyzed during hot-pressing at 1650ﾟC by 13.7 % of oxygen content.
A linear relation of stress-displacement in fracture behavior of monolithic mullite changed to a non-linear relation in the composites with 10-30 vol% of Si-Ti-C-O fabrics and hot-pressed at 1650ﾟC.Addition of Si-Ti-C-O fabrics decreased the four point flexural strength of monolithic mullite (328 MPa) to 292 MPa at 6 vol%, 271 MPa at 10 vol% and 59-78 MPa at 20-30 vol% of fabrice. The decrease of flexural strength for the composite was due to the residual tensile stress caused in the mullite layrs along the direction of length of composites. It is important to study fracture behavior of composite under multiaxial stress state for structural components in practical applications. The tension-compression biaxial strengh of composite materials was lower than that of monolithic mullite ceramics.

Research Products

• [Publications] Yoshihiro Hirata: "Colloidal Processing" Processing of the 8th CIMTEC-World Ceramics Congress & Forum on New Materials,Advances in Science and Technology. 3C. 1533-1544 (1995)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Yoshihiro Hirata: "Colloidal Processing for Preparation of Laminated Composites of New Zealard Kaolir/Woven Fabrics of Si-Ti-C-O Fiber" Materials Letters. 25. 37-42 (1995)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Yoshihiro Hirata: "Observation of Interfaces of Si-Ti-C-O Fiber/Mullite Matrix Composites by Analytical Transmission Electron Microsopy" Journal of the Ceramic Society of Japan. 103. 1197-1200 (1995)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Yoshihiro Takeshita: "Evaluation of Thermal Shock Resistance Using Precracked Specimens" Journal of the Ceramic Society of Japan. 103. 563-569 (1995)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Hiroshi Uchimura: "Measurement of Biaxial Displacement by a Speckle Correlation Method at High Temperature" Journal of the American Ceramic Society. 78. 3273-3276 (1995)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Yoshihiro Hirata: "Processing and Mechanical Proparties of Laminated Composites of Mullite/Woven Fabrics of Si-Ti-C-O Fibers" Journal of the European Ceramic Society. 16. 315-320 (1996)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] 平田 好洋: "セラミック織物強化複合材料のコロイドプロセッシング" マツダ財団研究報告. 8. 79-86 (1996)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Yoshitaka Kamino: "Preparation and Mechanical Properties of Alumina Long Fiber/Alumina Matrix Composites" Materials Letters. 28. 161-164 (1996)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Tsuyoshi Matsura: "Synthesis and Microstructure of Polytitanocarbosilane/Mullite Matrix Composite" Processings of the 6th Tohwa University International Symposium,Frontier Nanostructured Ceramics. 177-181 (1996)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Yoshitaka Kamino: "Fracture Behavior of Si-C-O Fiber/Alumina Matrix Composite" Proceedings of the 6th Tohwa University International Symposium,Frontier Nanostructured Ceramics. 165-170 (1996)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Yukihiro Kyoden: "Oxidation and Mechanical Properties of Laminated Si-Ti-C-O Fabrics/Mullite Matrix Composites" Proceedings of the 6th Tohwa University International Symposium,Frontier Nanostructured Ceramics. 171-175 (1996)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Yoshihiro Hirata: "Theoretical Aspects of Colloidal Processing" Ceramics International. 23. 93-98 (1997)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Takashi Ono: "Fracture Tonyhness of Structural Ceramics Under Biaxial Stress State by Anticlastic Bending Test" Journal of Engineering for Gas Turbine and Power. 119. 7-14 (1997)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Yoshitaka Kamino: "Preparation and Mechanical Properties of Carbon fibers/Shirasu Glass Composites" Proceedings of the 5th Japan International Sampe Symposium. 523-528 (1997)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Yukihiro Kyoden: "Processing and Fracture Behavior of Laminated Si-Ti-C-O Fibers/Mullite Matrix Composites" Proceedings of the 6th International Symposium on Ceramic Materials & Components for Engines. (印刷中). (1997)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Masaki Kaji: "Measurement of Internal Friction in Silicon Nitride Under Tensile Stress" Proceedings of the 6th International Symposium on Ceramic Materials & Components for Engines. (印刷中). (1997)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Yoshihiro Hirata: "Reaction between Mullite and Polytitanocarbosilane" Proceedings of International Symposium on Novel Synthesis and Processing of Ceramics. (印刷中). (1997)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] 小野 孝: "Si-Ti-C-O繊維/ムライトマトリックス系複合材料の鞍状曲げ試験における破壊挙動" 日本セラミックス協会学術論文誌. (発表予定). (1998)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] 藤本 哲朗: "Si-Ti-C-O繊維/ムライトマトリックス基複合材料のTEM観察" 日本セラミックス協会学術論文誌. (発表予定). (1998)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Y.Hirata: "Colloidal processing Proceedings of the 8th CIMTEC-World Ceramics Congress & Forum on New Materials" Proceedings of the 8th CIMTEC-World Ceramics Congress & Forum on New Materials Advances in science and Technology. 3C. 1533-1544 (1995)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y.Hirata: "Colloidal Processing for Preparation of Laminated Composite of New Zealand Kaolin/Woven Fabrics of Si-Ti-C-O Fiber" Materials Letters. 25. 37-42 (1995)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y.Hirata: "Observation of Interfaces of Si-Ti-C-O Fiber/Mullite Matrix Composites by Analytical Transmission Electron Microscopy" Journal of the Ceramic Society of Japan. 103. 1197-1200 (1995)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y.Takeshita: "Evalution of Thermal Shock Resistance Using Precracked Specimens" Journal of the Ceramic Society of Japan. 103. 563-569 (1995)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] H.Uchimura: "Measurement of Biaxial Displacement by a Speckle Correlation Method at High Temperature" Journal of the American Ceramic Society. 78. 3273-3276 (1995)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y.Hirata: "Processing and Mechanical Properties of Laminatd Composites of Mullite/Woven Fabrics of Si-Ti-C-O Fibers" Journal of the European Ceramic Society. 16. 315-320 (1996)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y.Hirata: "Colloidal Processing of Woven Fabrics-Reinforced Ceramics Matrix Composites" The Mazda Foundation Research Report. 8. 79-86 (1996)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y.Kamino: "Preparation and Mechanical Properties of Alumina Long Fiber/Alumina Matrix Composites" Materials Letters. 28. 161-164 (1996)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] T.Matsura: "Synthesis and Microstructure of Polytitanocarbosilane/Mullite Matrix Composite" Proceedings of the 6th Tohwa University International Symposium, Frontier Nanostructured Ceramics. 177-181 (1996)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y.Kamino: "Fracture Behavior of Si-C-O Fiber/Alumina Matrix Composite" Proceedings of the 6th Tohwa University International Symposium, Frontier Nanostructured Ceramics. 165-170 (1996)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y.Kyoden: "Oxidation and Mechanical Properties of Laminated Si-Ti-C-O Farics/Mullite Matrix Composites" Proceedings of the 6th Tohwa University International Symposium, Frontier Nanostructured Ceramics. 171-175 (1996)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y.Hirata: "Theoretical Aspects of Colloidal Processing" Ceramics International. 23. 93-98 (1997)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] T.Ono: "Fracture Toughness of Structural Ceramics Under Biaxial Stress State by Anticlastic Bending Test" Journal of Engineering for Gas Turbine and Power. 119. 7-14 (1997)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y.Kamino: "Preparation and Mechanical Properties of Carbon Fibers/Shirasu Glass Composites" Proceedings of the 5th Japan International Sampe Symposium. 523-528 (1997)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y.Kyoden: "Processing and Fracture Behavior of Laminated Si-Ti-C-O Fibers/Mullite Matrix Composites" Proceedins of the 6th International symposium on Ceramic Materials & Composites for Engines. 788-791 (1997)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] M.Kaji: "Measument of International Friction in Silicon Nitride under Tensile Stress" Proceedings of the 6th International Symposium on Ceramic Materials & Composites for Engines. 516-519 (1997)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y.Hirata: "Reaction between Mullite and Polytitanocarbosilane" Proceedings of the 6th International Symposium on Novel synthesis and Processing of Ceramics. (in press). (1997)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y.takeshita: "Ealuation of Thermal Shock Fatigue Properties for Structural Ceramics" Ceramic transactions, American Ceramic Society. (in press). (1998)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] T.Ono: "Fracture Behavior of Si-Ti-C-O Fiber/Mullite Matrix Composites under Anticlastic Bending Test" Journal of the Ceramic Society of Japan. (to be submitted to). (1998)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] T.Fujimoto: "TEM observation of Si-Ti-C-O Fiber/Mullite Matrix Composites" Journal of the Ceramic Society of Japan. (to be submitted to). (1998)
  • Description: 「研究成果報告書概要(欧文)」より