离心成型工艺制备改性碳纤维增强HA复合材料  

Preparation of treated carbon fibers reinforced HA composites by centrifugal slip casting technology

作　　者：李强[1,2] 张峰峰[1] 于景媛[1] 孟秀娟[1] 孙旭东[2] 

机构地区：[1]辽宁工业大学材料科学与工程学院,辽宁锦州121001 [2]东北大学材料与冶金学院,沈阳110004

出　　处：《功能材料》2014年第5期5117-5121,共5页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2011AA060102);长江学者和创新团队计划资助项目(IRT0713);辽宁省自然科学基金资助项目(201102090);辽宁省博士启动基金资助项目(20111068);辽宁省高等学校优秀人才支持计划资助项目(LJQ2012056;LJQ2013067)

摘　　要：先对碳纤维进行HCl预处理,然后通过溶胶-凝胶技术在预处理后碳纤维表面涂覆HA涂层,最后利用离心成型技术制备改性碳纤维增强HA复合材料。重点研究碳纤维的改性工艺,观察改性前后碳纤维表面的微观形貌,分析HA浆料固相含量对离心过程中物质分离现象的影响,测量不同碳纤维含量下烧结产物的抗弯强度和断裂韧度。研究结果表明,经过HCl和提拉HA溶胶复合处理的碳纤维表面具有1层致密的、与基体结合性能较好的膜层。固相含量为50%(质量分数)HA浆料在2 860g加速度下离心后所得生坯密度均匀,SEM观察表明烧结产物致密,没有明显的物质分离现象。当碳纤维含量为2%(质量分数)时,离心成型制备的改性碳纤维/HA复合材料的抗弯强度达到最大值93.5 MPa;当碳纤维含量为2.5%(质量分数)时,该复合材料的断裂韧度达到最大值1.96MPa·m1/2。The carbon fibers treated by HCl were coated with HA layers using sol-gel technology and then used to fabricate the treated C-fibers reinforced HA composites by centrifugal slip casting technology.The treated technologies of C-fibers were studied,micro-morphologies of the untreated and treated C-fibers were observed, the effect of the solid content of HA slurries on mass segregation during centrifugal process was analyzed,and mechanical properties of sintered composites were measured.The results show the carbon fibers after HCl dis-posal and dip in HA sol have a compact layer which has better contact with HA matrix.After centrifuged at 2 860 g acceleration,the green compacts have uniform density.SEM observation shows the sintered composites have compact microstructure and no obvious mass segregation phenomenon.The treated CF/HA composites prepared by centrifugal slip casting have the highest bending strength of 93.5 MPa and flexural toughness of 1.96 MPa？m1/2 ,respectively,when the contents of C-fibers was 2% and 2.5wt%.

关 键 词：离心成型 HA复合材料 改性碳纤维 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]