Al_2O_3/Ti_2AlN复合材料的变形机制研究
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摘要
采用真空热压法原位形成强化相Al_2O_3,制备出Al_2O_3颗粒增强Ti_2AlN基复合材料。本文对热压态复合材料样品在室温下不同载荷条件下的维氏硬度进行测量,观察了压痕裂纹的形貌,应用压痕方程得出了复合材料的断裂韧性。并对热压态复合材料样品在不同温度下的压缩变形进行了研究,观察了不同变形量样品的变形后形貌。
Al_2O_3/Ti_2AlN composites were prepared by vacuum hot pressing,which Al_2O_3 particles as strengthening phase were in situ formed. In this paper,the Vickers hardness of hot-pressed composites under different loads at room temperature was measured,the morphology of indentation cracks was observed,and the fracture toughness of composites was obtained by indentation equation. The compression deformation of as hot-pressed composites at different temperatures was studied,and the morphologies of the samples with different deformation were observed.
Al_2O_3/Ti_2AlN composites were prepared by vacuum hot pressing,which Al_2O_3 particles as strengthening phase were in situ formed. In this paper,the Vickers hardness of hot-pressed composites under different loads at room temperature was measured,the morphology of indentation cracks was observed,and the fracture toughness of composites was obtained by indentation equation. The compression deformation of as hot-pressed composites at different temperatures was studied,and the morphologies of the samples with different deformation were observed.
引文
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[13] Anstis G R,Chantikul P,Lawn B R,et al. A Critical Evaluation of Indentation Techniques for Measuring Fracture Toughness:I,Direct Crack Measurements[J], J. Am. Ceram.Soc.,1981,64(9):533-538.
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[15] Alexander W,Shackelford J F. CRC Materials Science and Engineering Handbook[M].CRC,5th Edition,2001.
[2] Radovic M,Barsoum M W,MAX phases:Bridging the gap between metals and ceramics[J]. American Ceramic Society Bulletin,2013,92(3):20.
[3] Hoffman E N,Vinson D W,Sindelar R L,et al.MAX phase carbides and nitrides:Properties for future nuclear power plant in-core applications and neutron transmutation analysis[J]. Nuclear Engineering and Design,2012,244:17-24.
[4] Tallman D J,Hoffman E N,Caspi E N,et al.Barsoum,Effect of neutron irradiation on select MAX phases[J]. Acta Mater.,2015,85:132-143.
[5] BarsoumM W,li M A,El-Raghy T. Processing and characterization of Ti2Al C,Ti2Al N,and Ti2Al C0. 5N0. 5[J],Met. Mater. Trans.,2000,31A:1857-1865.
[6] Lin Z J,Zhuo M J,Li M S,et al. Synthesis and microstructure of layered-ternary Ti2Al N ceramic[J]. Scripta Materialia 2007,56(12):1115-1118.
[7] Ming Y,Mei B C,Zhu J Q,et al. Synthesis of high-purity bulk Ti2Al N by spark plasma sintering(SPS)[J]. Ceramics International,2008,34(6):1439-1442.
[8] Liu Yi,Li Yingxin,Li Fan,et al. Highly textured Ti2Al N ceramic prepared via thermal explosion followed by edge-free spark plasma sintering[J],Scripta Materialia,2017,136:55-58.
[9] Cui B,Sa R,Jayaseelan D D,et al. Microstructural evolution during high-temperature oxidation of spark plasma sintered Ti2Al N ceramics[J],Acta Mater.,2012,60(3):1079-1092.
[10] Luo Y M,Li S Q,Pan W,Chen J,et al. Machinable and mechanical properties of sintered Al2O3-Ti3SiC2composites[J],Journal of Materials Science,2004,39(9):3137-3140.
[11] Yang Jian,Pan Limei,Gu Wei,et al. Microstructure and mechanical properties of in situ synthesized(Ti B2+Ti C)/Ti3SiC2composites[J],Ceramics International,2012,38(1):649-655.
[12] Li J Y,Mei Q S,Cui Y Y,et al. Production of Al2O3-Ti2Al N composite with novel combination of high temperature properties[J],Materials Science and Engineering A,2014,607:6-9.
[13] Anstis G R,Chantikul P,Lawn B R,et al. A Critical Evaluation of Indentation Techniques for Measuring Fracture Toughness:I,Direct Crack Measurements[J], J. Am. Ceram.Soc.,1981,64(9):533-538.
[14] Greskovich C,Palm J A. Observations on the fracture-toughnesss of Beta-Si3N4-BetaSiC Compositions[J],J. Am. Ceram. Soc.,1980,63(9-10):597-599.
[15] Alexander W,Shackelford J F. CRC Materials Science and Engineering Handbook[M].CRC,5th Edition,2001.
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