A Multi-interlayer LMAS Joint of C/C-SiC Composites and LAS Glass Ceramics

Qiangang Fu; Fengling Zhao; Hejun Li; Han Peng; Xiaoying Nan

doi:10.1016/j.jmst.2014.11.024

A Multi-interlayer LMAS Joint of C/C-SiC Composites and LAS Glass Ceramics

Qiangang Fu, Fengling Zhao, Hejun Li, Han Peng, Xiaoying Nan

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Porous C/C-SiC composites were prepared through a two-step chemical vapor infiltration process, and a multi-interlayer joint of Li₂O-MgO-Al₂O₃-SiO₂ (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 essential 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 19.91MPa after changing the composites from high-density C/C composites (1.75g/cm³) with a CVD-SiC coating to the C/C-SiC composites with a low density (1.48g/cm³). 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.

Original language	English
Pages (from-to)	467-472
Number of pages	6
Journal	Journal of Materials Science and Technology
Volume	31
Issue number	5
DOIs	https://doi.org/10.1016/j.jmst.2014.11.024
State	Published - 1 May 2015

Keywords

C/C-SiC
Interface
Interlayer
Joining and ceramic

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title = "A Multi-interlayer LMAS Joint of C/C-SiC Composites and LAS Glass Ceramics",

abstract = "Porous C/C-SiC composites were prepared through a two-step chemical vapor infiltration process, and a multi-interlayer joint of Li2O-MgO-Al2O3-SiO2 (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 essential 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 19.91MPa after changing the composites from high-density C/C composites (1.75g/cm3) with a CVD-SiC coating to the C/C-SiC composites with a low density (1.48g/cm3). 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.",

keywords = "C/C-SiC, Interface, Interlayer, Joining and ceramic",

author = "Qiangang Fu and Fengling Zhao and Hejun Li and Han Peng and Xiaoying Nan",

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year = "2015",

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doi = "10.1016/j.jmst.2014.11.024",

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AU - Fu, Qiangang

AU - Zhao, Fengling

AU - Li, Hejun

AU - Peng, Han

AU - Nan, Xiaoying

PY - 2015/5/1

Y1 - 2015/5/1

N2 - Porous C/C-SiC composites were prepared through a two-step chemical vapor infiltration process, and a multi-interlayer joint of Li2O-MgO-Al2O3-SiO2 (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 essential 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 19.91MPa after changing the composites from high-density C/C composites (1.75g/cm3) with a CVD-SiC coating to the C/C-SiC composites with a low density (1.48g/cm3). 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.

AB - Porous C/C-SiC composites were prepared through a two-step chemical vapor infiltration process, and a multi-interlayer joint of Li2O-MgO-Al2O3-SiO2 (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 essential 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 19.91MPa after changing the composites from high-density C/C composites (1.75g/cm3) with a CVD-SiC coating to the C/C-SiC composites with a low density (1.48g/cm3). 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.

KW - C/C-SiC

KW - Interface

KW - Interlayer

KW - Joining and ceramic

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JO - Journal of Materials Science and Technology

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A Multi-interlayer LMAS Joint of C/C-SiC Composites and LAS Glass Ceramics

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