SiC nanowires reinforced MAS joint of SiC coated carbon/carbon composites to LAS glass ceramics

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• 作者：Qian-Gang Fu ; ^{fuqiangang@nwpu.edu.cn} ; Bing-Lin Jia ; He-Jun Li ; Ke-Zhi Li ; Yan-Hui Chu
• 关键词：Hot-pressing ; Joining ; Fracture ; Toughness and toughening ; Glass ceramics
• 刊名：Materials Science and Engineering: A
• 出版年：2012
• 出版时间：15 January 2012
• 年：2012
• 卷：532
• 期：Complete
• 页码：255-259
• 全文大小：1182 K

文摘

In order to improve the shear strength of the joints of carbon/carbon (C/C) composites to lithium aluminum silicate (LAS) glass ceramics, SiC coating and magnesium aluminum silicate (MAS) glass ceramics were used as transition layer and middle layer, respectively, and high quality SiC nanowires were applied as the reinforcement materials in MAS. The SiC nanowires reinforced MAS joint of SiC coated C/C composites to LAS glass ceramics was prepared by a three-step technique of pack cementation, CVD and hot-pressing. The microstructures of the as-prepared joints were characterized by SEM and EDS, and the shear strength of the joints was also examined. The shear strength of the SiC-MAS joint increased from 24.0 ¡À 2.0 MPa to 35.5 ¡À 5.5 MPa after adding SiC nanowires in MAS. The load decreases in step-style but not perpendicularly after the maximum value, which demonstrates good toughness of the joint with SiC nanowire porous layer.