Fabrication and mechanical properties of carbon fibers/lithium aluminosilicate ceramic matrix composites reinforced by in-situ growth SiC nanowires |
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| Affiliation: | 1. School of Materials Science and Engineering, Harbin Institute of Technology (Weihai), Weihai, 264209, PR China;2. School of Science, Lanzhou University of Technology, Lanzhou, 730050, PR China;3. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, PR China;4. School of Materials Science and Engineering, Shandong University of Technology, Zibo, 255049, Shandong, PR China;1. Moscow State University of Technology “STANKIN”, Vadkovskij per. 1, Moscow, 127055, Russian Federation;2. Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), C/ Sor Juana Inés de la Cruz 3, 28049, Madrid, Spain;1. College of Materials Science and Engineering, Hunan University, Changsha 410082, PR China;2. College of Metallurgy and Material Engineering, Hunan University of Technology, Zhuzhou 412007, PR China;1. MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China;2. Integrated Composites Lab (ICL), Department of Chemical &Biomolecular Engineering, University of Tennessee, Knoxville, TN 37966, USA;3. Institute of Material Science and Engineering, Qingdao University, Qingdao 266071, China;4. Department of Mechanical Engineering and Integrated Nanosystems Development Institute, Indiana University-Purdue University Indianapolis, 723 W. Michigan St., Indianapolis, IN 46202, USA;5. College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China;6. School of Material Science and Engineering, Jiangsu University of Science and Technology (JUST), No 2, Mengxi Rd, Zhenjiang, Jiangsu, China |
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| Abstract: | To improve the mechanical properties of carbon fibers/lithium aluminosilicate (Cf/LAS) composites, Cf/LAS with in-situ grown SiC nanowires (SiCnw-Cf/LAS) were prepared by chemical vapor phase reaction, precursor impregnation, and hot press sintering, consecutively. The effect of multi-scaled reinforcements (micro-scaled Cf and nano-scaled SiCnw) on the mechanical properties was investigated. The phase composition, microstructure and fracture surface of the composites were characterized by XRD, Raman Spectrum, SEM, and TEM. The morphology of SiCnw has a close relation with the content of Si. Microstructure analysis suggests that the growth of SiC nanowires depends on the VLS mechanism. The multi-scale reinforcement formed by Cf and SiCnw can significantly improve the mechanical properties of Cf/LAS. The bending strength of SiCnw-Cf/LAS reaches to 597 MPa, achieving an increase of 19% to Cf/LAS. Moreover, the samples show a maximum fracture toughness of 11.01 MPa m1/2, achieving an increase of 46.4% to Cf/LAS. Through analysis of the fracture surface, the improved mechanical properties could be attributed to the multi-scaled reinforcements by the pull-out and debonding of Cf and SiCnw from the composites. |
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| Keywords: | Multi-scaled reinforcements SiC nanowires Carbon fiber Lithium aluminosilicate glass ceramic Ceramic matrix composites |
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