The preparation and mechanical properties of carbon–carbon/lithium–aluminum–silicate composite joints |
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| Affiliation: | 1. School of Materials Science and Engineering, Central South University, Changsha 410083, PR China;2. Phase Diagrams and Materials Design Center, Central South University, Changsha 410083, PR China;1. College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China;2. School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China;1. Nanomaterials and Nanotechnology Research Center (CINN), CSIC-University of Oviedo (UO), Avda.de la Vega 4-6, El Entrego, San-Martín del Rey Aurelio, Spain;2. Centro de Biotecnología Animal, SERIDA, Camino de Rioseco 1225, 33394 Gijón, Spain;1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China;2. State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China |
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| Abstract: | Silica carbide modified carbon cloth laminated C–C composites have been successfully joined to lithium–aluminum–silicate (LAS) glass–ceramics using magnesium–aluminum–silicate (MAS) glass–ceramics as interlayer by vacuum hot-press technique. The microstructure, mechanical properties and fracture mechanism of C–C/LAS composite joints were investigated. SiC coating modified the wettability between C–C composites and LAS glass–ceramics. Three continuous and homogenous interfaces (i.e. C–C/SiC, SiC/MAS and MAS/LAS) were formed by element interdiffusions and chemical reactions, which lead to a smooth transition from C–C composites to LAS glass–ceramics. The C–C/LAS joints have superior flexural property with a quasi-ductile behavior. The average flexural strength of C–C/LAS joints can be up to 140.26 MPa and 160.02 MPa at 25 °C and 800 °C, respectively. The average shear strength of C–C/LAS joints achieves 21.01 MPa and the joints are apt to fracture along the SiC/MAS interface. The high retention of mechanical properties at 800 °C makes the joints to be potentially used in a broad temperature range as structural components. |
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