CF-B4C/Al中子吸收复合材料的微观组织及力学行为  

Microstructure and mechanical behavior of CF-B_(4)C/Al neutron absorbing composites

作　　者：孙致平 张翠英 陈洪胜 SUN Zhiping;ZHANG Cuiying;CHEN Hongsheng(School of Intelligent Manufacturing,Changzhou Vocational Institute of Engineering,Changzhou 213164,China;Jiangsu Chenguang Coating CO.LTD.,Changzhou 213154,China;Maanshan Haoyuan New Materials Technology CO.LTD.,Maanshan 243000,China;College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]常州工程职业技术学院智能制造学院,常州213164 [2]江苏晨光涂料有限公司,常州213154 [3]马鞍山浩远新材料科技有限公司,马鞍山243000 [4]太原理工大学机械与运载工程学院,太原030024

出　　处：《复合材料学报》2022年第2期769-776,共8页Acta Materiae Compositae Sinica

基　　金：产学研横向科研项目(RH2000002823);国家自然科学基金(51805358);常州工程职业技术学院高层次人才科研启动基金(11130900118003)。

摘　　要：基于B_(4)C良好的中子吸收性能和碳纤维(CF)慢化中子的性能,采用真空热压烧结方法制备了集结构与功能一体具有不同CF含量的CF-B_(4)C混合增强6061Al基复合材料,并对热轧后的组织形貌和力学性能进行分析。结果表明,大变形量热轧后B_(4)C颗粒和CF分布较均匀,没有出现大面积的聚集现象,但是少量B4C颗粒和CF在轧制压力的作用下发生了断裂。当变形量达到60%时,复合材料的抗拉强度可达(265±3)MPa,与6061Al合金的抗拉强度相比,不同厚度的CF-B_(4)C/Al复合材料的抗拉强度分别提高了80%和112%。随着CF含量的增加,CF-B_(4)C/Al复合材料的强度和延伸率均减小。当CF含量达到5wt%时,断裂的主要原因是有纤维的聚集及纤维沿断裂方向排布。Based on the good neutron absorption property of B_(4)C and the moderated neutron property of carbon fiber(CF),CF-B_(4)C mixed-reinforced 6061 Al matrix composites with different CF contents were prepared by vacuum hot pressing sintering method.The microstructure and mechanical properties of the composites were analyzed.After hot rolling with large deformation,the B_(4)C particles are distributed evenly without large area of particle aggregation,but a small amount of B4 C particles and CF are brittle.When the deformation reaches 60%,the tensile strength of the material can reach(265±3)MPa.Compared with the tensile strength of 6061 Al alloy,the tensile strength values of CF-B_(4)C/Al composites with different thicknesses increase by 80%and 112%respectively.With the increase of CF content,the strength and elongation of CF-B_(4)C/Al composites decrease.When the content of CF reaches 5 wt%,the main reason of fracture is the aggregation of fibers and the arrangement of fibers along the fracture direction.

关 键 词：CF-B_(4)C/Al复合材料 真空热压烧结 热轧 组织形貌 拉伸断裂 中子吸收 

分 类 号：TB333[一般工业技术—材料科学与工程]