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Porous C/C-SiC composites were prepared through a two-step chemical vapor infiltration process,and a multi-interlayer joint of Li20-MgO-Al_2O_3-SiO_2(LMAS) was applied to join C/C-SiC composites and lithium aluminum silicate(LAS) glass ceramics by means of a vacuum hot-pressing technique.Plenty of SiC whiskers were generated in the pores of low-density C/C composites during chemical vapor deposition process,which is essentia! to form a zigzag interface structure between C/C-SiC substrate and the LMAS interlayer.The average shear strength of the LMAS joint was improved from 12.17 to 19.91 MPa after changing the composites from high-density C/C composites(1.75 g/cm~3) with a CVD-SiC coating to the C/C-SiC composites with a low density(1.48 g/cm~3).The improvement of the joint strength is mainly attributed to the formation of the inlay structure at the SiC-C/C and SiC-LMAS interfaces.
Porous C / C-SiC composites were prepared through a two-step chemical vapor infiltration process, and a multi-interlayer joint of Li20-MgO-Al 2 O 3 -SiO 2 (LMAS) was applied to join C / C-SiC composites and lithium aluminum silicate (LAS) glass ceramics by means of a vacuum hot-pressing technique. Plenty of SiC whiskers were generated in the pores of low-density C / C composites during chemical vapor deposition process, which is essentia! To form a zigzag interface structure between C / C-SiC substrate and the LMAS interlayer. The average shear strength of the LMAS joint was improved from 12.17 to 19.91 MPa after changing the composites from high-density C / C composites (1.75 g / cm ~ 3) with a CVD- SiC The improvement of the joint strength is primarily attributed to the formation of the inlay structure at the SiC-C / C and SiC-LMAS interfaces .