先驱体浸渍裂解结合化学气相渗透工艺下二维半和三维织构SiC/SiC复合材料的结构与性能
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摘要
通过先驱体浸渍裂解工艺结合化学气相渗透工艺(PIP+CVI)制备了二维半(2.5D)和三维(3D)编织结构的碳化硅纤维增强碳化硅基(SiC/SiC)复合材料,对两者的密度、热导率、力学性能以及微观结构等进行了测试分析。结果表明,PIP+CVI工艺制备的SiC/SiC复合材料具有较低的密度(1.98~2.43g·cm-3)和热导率(0.85~2.08 W·m~(-1)·K~(-1)),初期CVI纤维涂层能够提高纤维-基体界面剪切强度(~141.0 MPa),从而提高SiC/SiC复合材料的力学性能,后期CVI整体涂层明显提高了2.5DSiC/SiC复合材料的密度、热导率和力学性能,对3DSiC/SiC复合材料性能的影响不明显。
By applying the combinational process of polymer impregnation & pyrolysis and chemical vapor infiltration(PIP+CVI),the present work successfully carried out the fabrication of a 2.5 dimensional and a 3 dimensional SiC/SiC composite,as well as the porosity,thermal conductivity,mechanical property and microstructure characterization and analyses for the products.The low density(1.98—2.43 g·cm~(-3))and low thermal conductivity(0.85—2.08 W·m~(-1)·K~(-1))of the PIP+CVI 2.5D and 3D SiC/SiC composites could be confirmed from the experiment.And moreover,it can be deduced that the pre-weave CVI fiber coating improves the fiber-matrix interface shear strength and hence the resultant composite's mechanical properties,while the effectiveness of post-pyrolysis overall CVI coating toward the density,thermal conductivity and mechanical properties promotion is notable for the2.5 DSiC/SiC composite but inconspicuous for the 3D one.
By applying the combinational process of polymer impregnation & pyrolysis and chemical vapor infiltration(PIP+CVI),the present work successfully carried out the fabrication of a 2.5 dimensional and a 3 dimensional SiC/SiC composite,as well as the porosity,thermal conductivity,mechanical property and microstructure characterization and analyses for the products.The low density(1.98—2.43 g·cm~(-3))and low thermal conductivity(0.85—2.08 W·m~(-1)·K~(-1))of the PIP+CVI 2.5D and 3D SiC/SiC composites could be confirmed from the experiment.And moreover,it can be deduced that the pre-weave CVI fiber coating improves the fiber-matrix interface shear strength and hence the resultant composite's mechanical properties,while the effectiveness of post-pyrolysis overall CVI coating toward the density,thermal conductivity and mechanical properties promotion is notable for the2.5 DSiC/SiC composite but inconspicuous for the 3D one.
引文
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14 Yao X M,Huang Z R,Tan S H.Preparation of silicon carbide reticulated porous ceramics sintered at low temperature with PCS as sintering additive[J].Journal of Inorganic Materials,2010,25(2):168(in Chinese).姚秀敏,黄政仁,谭寿洪.聚碳硅烷低温烧结碳化硅网眼多孔陶瓷的研制[J].无机材料学报,2010,25(2):168.
15 Zhao S,Zhou X,Yu J,et al.Fabrication and characterization of 2 .5Dand 3DSiCf/SiC composites[J].Fusion Engineering and Design,2013,88(9-10):2453.
16 Zhao S,Yang Z,Zhou X.Fabrication and characterization of in-situ grown carbon nanotubes reinforced SiC/SiC composite[J].Ceramics International,2016,42(7):9264.
2 Zhao S,Yang Z,Zhou X,et al.Microstructure and mechanical properties of compact SiC/SiC composite fabricated with an infiltrative liquid precursor[J].Journal of the American Ceramic Society,2015,98(4):1332.
3 Ivekovic′A,Novak S,Dra6ic′G,et al.Current status and prospects of SiCf/SiC for fusion structural applications[J].Journal of the European Ceramic Society,2013,33(10):1577.
4 Liu Y,Zhu J,Chen Z,et al.Mechanical behavior of 2.5D(shallow straight-joint)and 3Dfour-directional braided SiO2f/SiO2composites[J].Ceramics International,2012,38(5):4245.
5 Zhao S,Yang Z,Zhou X,et al.Design,fabrication,characterization and simulation of PIP-SiC/SiC composites[J].Computers,Materials&Continua,2014,42(2):103.
6 Nannetti C,Riccardi B,Ortona A,et al.Development of 2Dand 3D Hi-nicalon fibres/SiC matrix composites manufactured by a combined CVI-PIP route[J].Journal of Nuclear Materials,2002,307-311(2):1196.
7 Morscher G.Advanced woven SiC/SiC composites for high temperature applications[C]∥Composites at Lake Louise Canada.Alberta,2007.
8 Yuan Q,Song Y C.Research and development of continuous SiC fibers and SiCf/SiC composities[J].Journal of Inorganic Materials,2016,31(11):1157(in Chinese).袁钦,宋永才.连续SiC纤维和SiCf/SiC复合材料的研究进展[J].无机材料学报,2016,31(11):1157.
9 Chen W Y,Ding Z X.Pyrolysis kinetic behaviours of polycarbosilane by thermal analysis method[J].Journal of the Chinese Ceramic Society,2012,40(9):1278(in Chinese).陈文怡,丁治珣.聚碳硅烷的热裂解动力学行为研究[J].硅酸盐学报,2012,40(9):1278.
10 中国国家标准化管理委员会.GB/T 6569-2006,精细陶瓷弯曲强度试验方法[S].北京:中国标准出版社,2006.
11 中国国家标准化管理委员会.GB/T 23806-2009,精细陶瓷断裂韧性试验方法单边预裂纹梁(SEPB)法[S].北京:中国标准出版社,2009.
12 Zuo X Z,Zhang L T,Liu Y S,et al.Thermodynamic calculation of CH3SiCl3-BCl3-H2system vapor deposition[J].Acta Materiae Compositae Sinica,2010,27(5):55(in Chinese).左新章,张立同,刘永胜,等.CH3SiCl3-BCl3-H2体系气相沉积的热力学计算[J].复合材料学报,2010,27(5):55.
13 Yu H,Zhou X,Zhang W,et al.Mechanical properties of 3D KD-I SiCf/SiC composites with engineered fibre-matrix interfaces[J].Composits Science and Technology,2011,71(5):699.
14 Yao X M,Huang Z R,Tan S H.Preparation of silicon carbide reticulated porous ceramics sintered at low temperature with PCS as sintering additive[J].Journal of Inorganic Materials,2010,25(2):168(in Chinese).姚秀敏,黄政仁,谭寿洪.聚碳硅烷低温烧结碳化硅网眼多孔陶瓷的研制[J].无机材料学报,2010,25(2):168.
15 Zhao S,Zhou X,Yu J,et al.Fabrication and characterization of 2 .5Dand 3DSiCf/SiC composites[J].Fusion Engineering and Design,2013,88(9-10):2453.
16 Zhao S,Yang Z,Zhou X.Fabrication and characterization of in-situ grown carbon nanotubes reinforced SiC/SiC composite[J].Ceramics International,2016,42(7):9264.
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