采用选择性激光烧结成形技术制备碳纤维/热塑性聚氨酯(CF/TPU)复合材料烧结件,研究CF质量分数0～25%时对CF/TPU烧结件显微组织、力学性能及导电性能的影响。结果表明:随着CF含量的增加,烧结件的拉伸强度和断裂伸长率均呈现先升高后降低的趋势。当CF含量为5%时,CF/TPU烧结件的拉伸强度最大,为1.54MPa,当CF含量为10%时,CF/TPU烧结件断裂伸长率最大,为130.1%,较未添加CF时分别提升37.3%和29.4%。此外,随着CF含量的增加,烧结件的导电性能逐步提升,表面粗糙度值呈现先降低后上升的趋势,密度呈现下降的趋势。
Carbon fiber/thermoplastic polyurethane (CF/TPU) composite sintered parts were prepared using selective laser sintering (SLS) technology,and the effects of CF mass fractions ranging from 0 to 25wt% on the microstructure,mechanical properties,and electrical conductivity were investigated.The results showed that with increasing CF content,both the tensile strength and elongation at break initially increased and then decreased.At a CF content of 5wt%,the tensile strength reached a maximum of 1.54MPa.When the CF content was 10wt%,the elongation at break peaked at 130.1%,representing increases of 37.3% and 29.4%,respectively,compared to the sample without CF.In addition,the electrical conductivity of the sintered parts gradually improved with increasing CF content.The surface roughness first decreased and then increased,while the density showed a decreasing trend overall.
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