ナノ構造炭化ケイ素セラミックスの機械的特性と接触損傷
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概要
- 論文の詳細を見る
Three types of nanostructured silicon carbide ceramics were prepared with additives of Al_2O_3 and Y_2O_3 as the primary sintering additives, together with 1 mass% CaO, 1 mass% MgO or 0.73 mass% AlN. The silicon carbides (SiC) containing tens of nanometers of grains were successfully fabricated using a two-step sintering process. The mechanical properties and contact damages of the nanostructured SiC ceramics were investigated in this study. The nanostructured SiC ceramics exhibited a hardness of 〜20 GPa, a strength of 400-700 MPa, and a toughness of 3.0 MPa・m^<1/2>. The nature of the contact damage exhibited classical ring or cone cracks formed in a region of weak tension outside the contact rather than microcracks in the diffuse quasi-plastic zones as observed in heterogeneous microstructures consisting of micron-sized elongated grains.
- 社団法人日本セラミックス協会の論文
- 2007-05-01
著者
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LEE Seung
School of Advanced Materials Engineering. Chonbuk National University
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Kim Young
Department Of Electronics Engineering Korea Advance Intitute Of Science & Technology
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KIM Tae
School of Architectural, Civil and Environment Engineering, Kumoh National University of Technology
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Kim Young
Department Of Agricultural Chemistry The University Of Tokyo
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Lim Hong
School Of Mechanical And Automotive Engineering Kookmin University
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KIM Chul
School of Mechanical and Automotive Engineering, Kookmin University
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LEE Kee
School of Mechanical and Automotive Engineering, Kookmin University
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Lee Seung
School Of Advanced Materials Engineering Chonbuk National University
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Lee Seung
School Of Mechanical And Automotive Engineering Kookmin University
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Lee Kee
School Of Mechanical And Automotive Engineering Kookmin Univ.
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Kim Tae
School Of Mechanical And Automotive Engineering Kookmin Univ.
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Kim Young
Department Of Materials Science And Engineering University Of Seoul
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Lee Kee
School Of Computer And Information Engineering Inha University
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Kim Chul
School Of Mechanical And Automotive Engineering Kookmin University
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Kim Tae
School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, Gyeonggi 440-746, Korea
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