Physical Properties of SiCp/Sialon Composites with 4% Y2O3

稀土学报(英文版), 2004, 22(z3): 96-100.

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1.School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

2.School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

3.Institute of Mechanical engineering, Shenyang University,Shenyang 110044, China

4.School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

5.School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

6.School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

基金项目: 国家自然科学基金(50372010) 国家高技术研究发展计划(863计划)(2003 AA305620)

Physical Properties of SiCp/Sialon Composites with 4% Y2O3

Keywords： ceramic matrix composites

SiCp/Sialon ceramic manix composites were fabricated by pressureless sintering method using the Sialon powder synthesized from the kaolin clay and submicron SiC particles. The best sintering parameter of SiCp/Sialon composites with 4% (mass fraction) Y2O3 is 1500 ℃×2 h. It is shown that with the increasing of SiCp content, the bulk density decreases, the apparent porosity increases, the flexure strength increases at first and then decreases, the fracture toughness increases and hardness gradually decreases. The best physical properties can be obtained with 10 mass% SiCp, and the bulk density is 3.06 g ·cm-3, apparent porosity is 2.4％, flexure strength is 389.5 MPa, and Vickers hardness is 18.4 GPa. There will be 1280 MPa radial tensile stress and 640 MPa tangential stress in side of Sialon of interphase boundary between SiCp and Sialon phase by calcilation. The mechanism of improvement of SiC content on mechanical properties are also discussed.

参考文献

[1]	Yang Jan;Xue XainXi;Wang Wenzhong .Sialon characters and physical and chemical properties of sialon matrix ceramics[J].Ceramics Engineering,1999,33:1.
[2]	Jiang D Y;Zhang C;Shi J L et al.Microstructure and mechanical properties of Dy-α-sialon-Nano-size SiC composites[J].Journal of Materials Science and Technology,1997,13(04):336.
[3]	Liu Q;Gao L;Yan D S et al.The effect of heattreatment on the performance of sub-micron SiCp-reinforced α-β Sialon composites: Ⅰ. preparation of agglomerate-free Starting powders[J].Journal of the European Ceramic Society,1997,17(04):581.
[4]	Liu Q;Gao L;Yan D S et al.The effect of heattreatment on the performance of sub-micron SiCp-reinforced α-β Sialon composites: Ⅱ. heat-treatment studies[J].Journal of the European Ceramic Society,1997,17(04):587.
[5]	Liu Q;Gao L;Yan D S et al.The effect of heattreatment on the performance of sub-micron SiCp-reinforced α-β Sialon composites: Ⅲ. mechanical properties[J].Journal of the European Ceramic Society,1997,17(04):593.
[6]	Liu Q;Gao L;Yan D S et al.Hard sialon ceramics reinforced with SiC nanoparticles[J].材料科学与工程学报,1999,A269(01):1.
[7]	Wei Tao;Zhou Yu;Lei Tingquan.The Preparation and Properties of α + β-Sialon-SiCpl composites[J].Astronavigation Measuring Technology,1998(01):44.
[8]	Xu Fangfang;Wen Shulin .α-Sialon/SiC(w)composites sinteres in different atmosphere[J].Inorganic Materials,1998,13(03):320.
[9]	Kazuo U;Takahiro I .Preparation and properties of SiC fibre reinforced sialon ceramic composite[J].Ceramics International,1997,23:165.
[10]	Demir A;Thompson D P .High-performance SiC-fibre reinforced β-sialon CMCs prepared from heat-treated Nicalon fibres[J].Journal of the European Ceramic Society,2001,21(05):639.
[11]	Dupel P;Hendry A .Interracial reaction in carbon fibre-Sialon ceramic composites[J].Journal of the European Ceramic Society,1995,15(08):801.
[12]	TANG Jun;Tan Shouhong;Chen Zhongming .Strengthening and toughening of B4C-TiB2 multiphase Ceramics[J].Inorganic Materials,1997,12(02):169.

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Physical Properties of SiCp/Sialon Composites with 4% Y2O3

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