| PIP工艺制备SiC晶须增强SiCf/SiC复合材料的性能 |
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| 引用本文： | 姜卓钰,吕晓旭,周怡然,齐哲,高晔,赵文青,焦健. PIP工艺制备SiC晶须增强SiCf/SiC复合材料的性能[J]. 航空材料学报, 2021, 0(2) |
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| 作者姓名： | 姜卓钰 吕晓旭 周怡然 齐哲 高晔 赵文青 焦健 |
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| 作者单位： | 中国航发北京航空材料研究院先进复合材料国防科技重点实验室;中国航发北京航空材料研究院表面工程研究所;北京理工大学材料学院 |
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| 基金项目： | 国家科技重大专项(2017-VI-0007-0077)。 |
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| 摘 要： | 以不同界面层厚度的SiC纤维为增强相,采用先驱体浸渍裂解工艺(PIP)制备SiCf(PyC)/SiC复合材料,并在复合材料基体中引入SiC晶须,对其性能进行研究。结果表明:热解碳(PyC)界面层厚度约为230 nm时,SiC纤维拔出明显,SiCf/SiC复合材料拉伸强度、弯曲强度和断裂韧度分别达到192.3 MPa、446.9 MPa和11.4 MPa?m1/2;在SiCf/SiC复合材料基体中引入SiC晶须后,晶须的拔出、桥连及裂纹偏转等增韧机制增加了裂纹在基体中传递时的能量消耗,使复合材料的断裂韧度和弯曲强度分别提高了22.9%和9.1%。
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| 关 键 词： | 碳化硅 复合材料 SIC晶须 力学性能 |
Performance of SiC whisker reinforced SiCf/SiC composites fabricated by PIP |
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| JIANG Zhuoyu,LYU Xiaoxu,ZHOU Yiran,QI Zhe,GAO Ye,ZHAO Wenqing,JIAO Jian. Performance of SiC whisker reinforced SiCf/SiC composites fabricated by PIP[J]. Journal of Aeronautical Materials, 2021, 0(2) |
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| Authors: | JIANG Zhuoyu LYU Xiaoxu ZHOU Yiran QI Zhe GAO Ye ZHAO Wenqing JIAO Jian |
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| Affiliation: | (National Key Laboratory of Advanced Composites,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;Surface Engineering Division,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;School of Materials Science&Engineering,Beijing Institute of Technology,Beijing 100081,China) |
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| Abstract: | SiCf/SiC composites with the polycarbosilane and silicon carbide fiber of different pyrolytic carbon(PyC)interphase thicknesses as the reinforcement phase were fabricated by a polymer impregnation and pyrolysis(PIP)method.And SiC whisker was introduced into the SiCf/SiC composites to further improve its performance.It is found that the mechanical properties of SiCf/SiC composites have outstanding tensile strength,fracture toughness and flexural strength of 192.3 MPa,446.9 MPa and 11.4 MPa?m1/2,when the PyC interphase thickness is about 230 nm.After the introduction of SiC whisker,into the SiCf/SiC composite matrix,the toughening mechanisms such as whisker pull-out,whisker bridging and crack deflection increase the energy consumption when the crack is transferred in the matrix,and the fracture toughness and bending strength of the composite are increased by 22.9%and 9.1%respectively. |
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| Keywords: | silicon carbide composite SiC whisker mechanical properties |
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