三维网状碳纤维/HA复合材料的制备及性能研究  

Preparation and Properties Study on 3D network Carbon Fiber/HA Composites

作　　者：李强[1] 张峰峰[1] 孟秀娟[1] 于景媛[1] 孙文[1] 曹健铭 

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

出　　处：《辽宁工业大学学报（自然科学版）》2015年第1期45-49,共5页Journal of Liaoning University of Technology(Natural Science Edition)

基　　金：863计划项目(2011AA060102);辽宁省自然科学基金项目(2014020111);辽宁省高等学校杰出青年学者成长计划项目(LJQ2012056)

摘　　要：以三维网状碳纤维为增强体采用离心成型技术制备新型HA复合材料。重点研究三维网状碳纤维的改性工艺,观察改性前后碳纤维表面的微观形貌,分析离心加速度和HA浆料固相含量对离心过程中物质分离现象的影响,测量新型复合材料抗弯强度和断裂韧度。研究结果表明经过对氨基苯甲酸和提拉HA溶胶复合处理的碳纤维表面具有一层致密的、与基体结合性能较好的膜层。在p H=9,分散剂含量为5 wt%时,固相含量为55 wt%的HA浆料在2 860 g加速度下离心后所得生坯密度均匀,1 100℃真空烧结后三维网状碳纤维/HA复合材料的抗弯强度为109.4 MPa;断裂韧度为1.98 MPa·m1/2,分别比纯HA材料提高2.2和1.5倍。3D network carbon fibers were used to reinforce the HA composites by centrifugal slip casting technology. The treated technology of 3D network C-fibers were studied, micro-morphologies of the untreated and treated 3D network C-fibers were observed, the effects of the centrifugal acceleration and solid contents of HA slurries on mass segregation during centrifugal process were analyzed, and mechanical properties of sintered new composites were measured. The results show the 3D network carbon fibers after p-aminobenzoic acid disposal and dip in HA sol have a compact layer which has better contact with HA matrix. After centrifuged at 2860 g acceleration for the HA slurries prepared at pH=9 and the 5 wt% dispersant, the centrifuged green compacts have uniform density. After sintered at 1100℃, 3D CF/HA composites have the highest bending strength of 109.4 MPa and flexural toughness of 1.98 MPa.m1/2, which is 2.2 times and 1.5 times more than those of the HA samples respectively .

关 键 词：离心成型 HA复合材料 三维网状碳纤维 表面改性 

分 类 号：TB332[一般工业技术—材料科学与工程]