Design Concept of Strengthening and Toughening Mechanisms  in Nanocomposites —Ceramic/Metal Manocomposites—

S-M. CHOI; S. HONDA; T. NISHIKAWA; H. AWAJI; F. D. GNANAM; K. VISHISTA; T. KUROYAMA

doi:10.14852/jcersjsuppl.112.0.S912.0

Journal of the Ceramic Society of Japan, Supplement 112-1, PacRim5 Special Issue

セッションID: 12

DOI https://doi.org/10.14852/jcersjsuppl.112.0.S912.0

会議情報

主催: The Ceramic Society of Japan

共催: Iketani Science and Technology Foundation, International Ceramic Federation, Commemorative Organization for the Japan World Exposition '70, The American Ceramic Society, The Australasian Ceramic Society, The Chinese Ceramic Society, The Korean Ceramic Society, Joint Research Consortium of Synergy Ceramics/Fine Ceramics Research Association, Nanotechnology Researchers Network Center of Japan, The Special Coordination Funds for Promoting Science and Technology, Japan National Tourist Organization, Aichi Prefectural Government, CASIO SCIENCE PROMOTION FOUNDATION, DAIKO FOUNDATION, Nagoya Convention and Visitors Bureau, The Asahi Glass Foundation, The Kao Foundation For Arts And Sciences, The Murata Science Foundation, The Ogasawara Foundation for the Promotion of Science & Engineering, ASAHI GLASS CO., LTD. Research Center, CENTRAL GLASS CO., LTD., ELECTRIC GLASS INDUSTRY ASSOCIATION OF JAPAN (EGAJ), Hattori Company, Ltd., Hitachi Research Laboratory, Hitachi, Ltd., HOYA CORPORATION, INAX Corporation, ITOCHU CERATECH CORP., Japan Cement Association, KYOCERA Corporation, KYUSHU REFRACTORIES CO., LTD., MINO CERAMIC CO., LTD., Murata Manufacturing Co., Ltd., NGK INSULATORS LTD., NGK SPARK PLUG CO., LTD., NICHIAS Corporation, NIKKO COMPANY, Nippon Electric Glass Co., Ltd., Nippon Sheet Glass Co., Ltd., NORITAKE CO., LIMITED, Tokuyama Corporation, TOTO LTD.

Papers

Design Concept of Strengthening and Toughening Mechanisms in Nanocomposites

—Ceramic/Metal Manocomposites—

S-M. CHOI, S. HONDA, T. NISHIKAWA, H. AWAJI, F. D. GNANAM, K. VISHISTA, T. KUROYAMA

著者情報

キーワード: Nanocomposites, Frontal process zone size, PECS method, SEVNB technique, Fracture toughness

会議録・要旨集フリー

詳細

抄録

Al₂O₃/Ni nanocomposites were fabricated by means of plasma electric current sintering method. Mechanical properties of nanocomposites sintered with different sintering temperatures were compared with the monolithic alumina. Dense nanocomposites could be sintered at over 1350°C. Nanocomposites containing 5 vol% Ni sintered at 1550°C had the maximum value of fracture strength, 850 MPa, where transgranular mode of failure was predominant in fracture mode. In the case of fracture toughness, the samples sintered at 1350°C had higher value than the samples sintered at other temperatures. The maximum value of fracture toughness was 4.23 MPa•m^1/2 for 5 vol% Ni nanocomposites. From the result of relationship between K_IC and σ_c•r₀^1/2, both fracture strength and frontal process zone(FPZ) size were ought to be increased to improve fracture toughness. The fracture toughness and FPZ size in sintered specimen at 1450°C and 1550°C were slightly improved compared with un-annealed specimens.

責任著者(Corresponding author)

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