碳纳米管增强YAST微晶玻璃连接C/C复合材料与LAS陶瓷  

Connection between carbon-carbon composites and LAS ceramic with YAST glass-ceramic reinforced by CNTs

作　　者：强琪[1] 李克智[1] 高全明[2] 宋强[1] 王杰[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,西安710072 [2]晋西工业集团有限责任公司质量检验中心,太原030027

出　　处：《固体火箭技术》2010年第4期459-462,共4页Journal of Solid Rocket Technology

摘　　要：采用多壁碳纳米管(MWCNTs)增强YAST(Y2O3-Al2O3-SiO2-TiO2)微晶玻璃中间层的方法,以期改善LAS陶瓷/C-C复合材料接头的力学性能。实验中,采用原位生成碳纳米管和直接加入碳纳米管2种方法,制备出具有不同含量碳纳米管的中间层粉体,并将这些玻璃粉体作为中间层对C/C复合材料与LAS陶瓷进行热压连接。利用SEM、XRD等测试手段对接头的断口形貌、断口的物相组成进行了分析。研究结果表明,原位生成的碳纳米管在微晶玻璃基体中具有更好的分散性,其中间层断面具有明显的碳纳米管拔出现象,且无明显的贯穿性裂纹,其接头的平均剪切强度达到26.07 MPa。In order to improve the mechanical strength of the joints between carbon-carbon composites and LAS glass-ceramic,multi-walled CNTs were introduced to reinforce the YAST glass-ceramic interlayer.Both in-situ multi-walled CNTs/YAST and multi-walled CNTs-filled YAST were prepared to join carbon-carbon composites and LAS glass-ceramic.The microstructure and phase composition of the interface were analyzed by SEM and XRD.Results show that the in-situ multi-walled CNTs have a better dispersion in YAST glass-ceramic,and there are some CNTs pulled-out phenomena but no destructive crack in the interface.The average shear strength of the joints by in-situ multi-walled CNTs/YAST reaches 26.07 MPa.

关 键 词：碳纳米管 C/C复合材料 LAS陶瓷 YAST微晶玻璃 热压连接 

分 类 号：TB332[一般工业技术—材料科学与工程]