气相沉积CF改性PS的选择性激光烧结  

Selective Laser Sintering Experiment of Polystyrene Modified by Vapor Deposited CF

作　　者：杨来侠[1] 陈梦瑶[1] 赵贞慧[1] Yang Laixia;Chen Mengyao;Zhao Zhenhui(College of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054,China)

机构地区：[1]西安科技大学机械工程学院,西安710054

出　　处：《工程塑料应用》2017年第9期52-56,共5页Engineering Plastics Application

基　　金：863计划项目(2015AA042503)

摘　　要：由于普通碳纤维(CF)对聚苯乙烯(PS)烧结件弯曲强度的改善有限,在前期理论及实验基础上,对CF材料做气相沉积处理,制备PS/CF复合材料,再进行选择性激光烧结(SLS)实验,验证其增强效果;然后,改变经气相沉积法处理的CF与PS的配比,分析CF含量对制件强度及精度的影响;最后结合扫描电子显微镜(SEM)观察烧结件断面内部结构并进行分析。结果表明,经气相沉积处理的CF含量为10%时复合材料的弯曲强度较高,达10.17 MPa,比纯PS制件提高约76.3%。微观形貌SEM显示,随着CF含量的增加,孔隙量增加,从而导致SLS烧结件的强度降低。Due to the improvement of bending strength of polystyrene(PS)sintered parts was limited by ordinary carbon fiber(CF),based on the basis of previous theory and experiment,the CF was treated with vapor deposition method.Composites of PSreinforced with CF were prepared.Then prototyping experiments were carried out to demonstrate the reinforcement effect;then,the influence on bending strength owe to the content of CF was analyzed by changing mixing ratios.At last,the internal structureof sintered parts was observed and analyzed by scanning electron microscopy(SEM).The results show that the optimal ratio iscomposites of PS reinforced with10%vapor deposited CF,of which the bending strength is up to10.17MPa,about76.3%higherthan that of PS.The micro morphology SEM shows that the pore volume increases with the increase of CF content,which leads tothe lower strength of SLS sintered parts.

关 键 词：选择性激光烧结 聚苯乙烯 气相沉积处理 碳纤维 弯曲强度 

分 类 号：TG439.4[金属学及工艺—焊接]