TiB_2掺杂对碳纤维增强锂铝硅复合材料抗氧化性的影响  

Effect of TiB_2 Doping on Oxidation Resistance of Carbon Fiber Reinforced LAS Composites

作　　者：夏龙[1] 孙天成 姬栋超 XIA Long;SUN Tian-cheng;JI Dong-chao(School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China)

机构地区：[1]哈尔滨工业大学(威海)材料科学与工程学院,山东威海264209

出　　处：《精密成形工程》2018年第2期13-17,共5页Journal of Netshape Forming Engineering

基　　金：国家自然科学基金(51302050);航天创新基金

摘　　要：目的研究含有不同质量分数的TiB_2的C_f/LAS复合材料的抗弯强度变化规律。方法以碳纤维、TiB_2、硝酸锂、硝酸铝、硅溶胶和氨水为主要原料,采用溶胶凝胶法结合浆料浸渍-热压烧结工艺,制备了加入TiB_2的碳纤维增强锂铝硅微晶玻璃(LAS)复合材料C_f/LAS(TiB_2),利用XRD、FTIR、万能材料试验机、SEM等对C_f/LAS(TiB_2)复合材料的性能和微观结构进行研究。结果 TiB_2的质量分数为1%,3%,5%,9%的Cf/LAS(TiB_2)复合材料,在1000℃热处理30 min后的强度保留率分别为2.9%,29.1%,44.0%,50.0%。结论材料的强度保留率随TiB_2含量的增多而上升,因此C_f/LAS(TiB_2)复合材料的抗氧化性随着TiB_2含量的增加而增强。The paper aims to study change rules of flexural strength after doping different mass of TiB2in Cf/LAS composites.With carbon fiber,TiB2,lithium nitrate,aluminum nitrate,silica sol and ammonia as the main raw materials,sol-gel method combined with hot pressing sintering process was used to prepare TiB2carbon fiber reinforced LAS composites Cf/LAS(TiB2).Properties and microstructure of Cf/LAS(TiB2)composites were investigated by XRD,FTIR,universal material testing machine and SEM.The strength retention rates of Cf/LAS(TiB2)composites with TiB2content of1%,3%,5%,and9%after heat treatment at1000℃for30min were2.9%,29.1%,44.0%,and50.0%.The strength retention of the material increases with the increase of TiB2content.The oxidation resistance of Cf/LAS(TiB2)composites increases with the increase of TiB2content.

关 键 词：锂铝硅微晶玻璃 复合材料 掺杂 TIB2 抗氧化性 

分 类 号：TB332[一般工业技术—材料科学与工程]