连续碳纤维/Mg复合材料异形薄板件预制体制备与成型  

Fabrication and forming of preforms for carbon fiber/Mg composites sheet-shaped component

作　　者：苏常青[1] 齐乐华[1] 张丽丹[1] 卫新亮[1] 周计明[1] 杨方[1] 

机构地区：[1]西北工业大学机电学院,西安710072

出　　处：《复合材料学报》2017年第6期1285-1292,共8页Acta Materiae Compositae Sinica

基　　金：国家863计划(2015AA8011004B);国家自然科学基金(51472203;51521061;51575447)

摘　　要：针对连续碳纤维增强镁基(Cf/Mg)复合材料异形薄板件预制体制备成本高、性能不稳定等问题,提出了"仿形编织-环向缠绕-铺放定位-缝合增强"的低成本组合制备工艺,设计开发了与之相配套的预制体制备装置。通过理论与实验研究,确定薄板与凸台预制体分体制备:薄板预制体采用径向编织、环向缠绕,仿形无纬布织物与环向纤维层针刺合成,其中纬纱引纬张力控制在1.7~2.3N;凸台预制体采用无纬布横向叠层,再与环状薄板预制体缠绕缝合而成。所制备预制体外形完整,形态良好,环向碳纤维分布均匀、与径向增强碳纤维呈规则排列。经液固挤压制备的Cf/Mg复合材料异形薄板件表明,凸台与薄板连接强度良好,为成形高质量Cf/Mg复合材料异形薄板件奠定了基础。Besides the high cost, the preforms of CJMg composites sheet-shaped components prepared by the traditional fabrication techniques own the unstable performance. To overcome these disadvantages, a new fabrication technique entitled ＂Profiling weave-Hoop winding-Oriented placement-Stitched reinforcement＂ was proposed and consequently the related experimental devices were developed. Based on the experimental investigations, the sepa- rate preparations of the circular sheet preform and protruding table preform were fabricated and then protruding ta- ble preform was stitched to the sheet preform. The circular sheet preform was fabricated through the radial weave and circumferential winding of the fibers and the combination of the non-woven fabrics and hoop fiber layers, where-in the weft insertion weft tension control in 1.7--2.3 N. The protruding table preform was fabricated through the stack of the horizontal non-woven fabrics. The fabricated sheet-shaped preform preforms have the intact morphology with the uniformly distributed circular and radial fibers. Meanwhile, the Cf/Mg composites sheet-shaped compo- nents fabricated by the liquid-solid extrusion process show that the connection between the protruding table and circular sheet preform is of good quality.

关 键 词：复合材料 薄板 预制体 碳纤维 凸台 

分 类 号：TB331[一般工业技术—材料科学与工程]