气相沉积CF改性PS的选择性激光烧结

发布时间：2018-01-21 06:04

本文关键词： 选择性激光烧结聚苯乙烯气相沉积处理碳纤维弯曲强度　出处：《工程塑料应用》2017年09期 　论文类型：期刊论文

【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。
[Abstract]:Due to the limited improvement of flexural strength of PS / PS sintered parts, PS/CF composites were prepared by vapor deposition of CF materials on the basis of previous theories and experiments. Then the selective laser sintering (SLS) experiment was carried out to verify the enhancement effect. Then, the influence of CF content on the strength and precision of the parts was analyzed by changing the ratio of CF and PS treated by Vapor deposition. Finally, the internal structure of the sintered part was observed and analyzed by SEM. The results showed that the bending strength of the composite was higher when the CF content of the sintered part was 10. The microstructure of SEM shows that the porosity increases with the increase of CF content, which leads to the decrease of the strength of SLS sintered parts.
【作者单位】：西安科技大学机械工程学院;
【基金】：863计划项目(2015AA042503)
【分类号】：TB332;TQ325.2
【正文快照】： 选择性激光烧结(SLS)技术[1],是基于材料叠层累加的成型原理,将经切片软件进行分层处理的烧结件模型导入到计算机内,启动自动成型系统,在电机的驱动下,激光束按照程序所规定的路线进行精确的扫描烧结零件,每进行一层粉末的激光烧结,成型缸下降一个层厚,供粉缸上移相同的高度,

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