The preparation and mechanical properties of carbon-carbon/lithium-aluminum-silicate composite joints

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• 作者：Ke-zhi Li ; ^{likezhi@nwpu.edu.cn} ; Jie Wang ; Xiao-bin Ren ; He-jun Li ; Wei Li ; Zhao-qian Li
• 关键词：A. Composites ; C. Joining ; E. Mechanical
• 刊名：Materials and Design
• 出版年：2013
• 出版时间：February, 2013
• 年：2013
• 卷：44
• 期：Complete
• 页码：346-353
• 全文大小：2044 K

文摘

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 ¡ãC and 800 ¡ãC, 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 ¡ãC makes the joints to be potentially used in a broad temperature range as structural components.