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The preparation and mechanical properties of carbon–carbon/lithium–aluminum–silicate composite joints
Highlights ► First study to join carbon cloth laminated C–C composites to LAS glass–ceramics. ► First study on the flexural property of C–C/LAS joints at different temperatures. ► The joint flexural strength at 800°C can increase 14.1% than at room temperature. ► A quasi-ductile fracture behavior can be found in the C–C/LAS joints.
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 140.26MPa and 160.02MPa at 25°C and 800°C, respectively. The average shear strength of C–C/LAS joints achieves 21.01MPa 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.
The preparation and mechanical properties of carbon–carbon/lithium–aluminum–silicate composite joints
Highlights ► First study to join carbon cloth laminated C–C composites to LAS glass–ceramics. ► First study on the flexural property of C–C/LAS joints at different temperatures. ► The joint flexural strength at 800°C can increase 14.1% than at room temperature. ► A quasi-ductile fracture behavior can be found in the C–C/LAS joints.
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 140.26MPa and 160.02MPa at 25°C and 800°C, respectively. The average shear strength of C–C/LAS joints achieves 21.01MPa 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.
The preparation and mechanical properties of carbon–carbon/lithium–aluminum–silicate composite joints
Li, Ke-zhi (author) / Wang, Jie (author) / Ren, Xiao-bin (author) / Li, He-jun (author) / Li, Wei (author) / Li, Zhao-qian (author)
2012-07-28
8 pages
Article (Journal)
Electronic Resource
English
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