打印角度对FDM碳纤维增强聚醚醚酮力学性能及表面性能影响  

Impact of raster angle on mechanical and surface properties of FDM carbon fiber reinforced polyether ether ketone

作　　者：辛骅 陈棋棋 张泰 杨乐 贝茂阳 XIN Hua;CHEN Qiqi;ZHANG Tai;YANG Le;BEI Maoyang(School of Mechanical and Electrical Engineering,Shaanxi University of Science and Technology,Xi'an 710021,China;Shenzhen Kuowei Atomic Technology Co.,Ltd.,Shenzhen 518000,China)

机构地区：[1]陕西科技大学机电工程学院,西安710021 [2]深圳扩维原子科技有限公司,广东深圳518000

出　　处：《工程塑料应用》2025年第3期104-111,共8页Engineering Plastics Application

基　　金：陕西省教育厅专项科研计划项目(23JK0348)。

摘　　要：采用熔融沉积成型(FDM)技术制备了碳纤维增强聚醚醚酮(PEEK)复合材料样件,探究打印角度对样件力学性能、失效模式及表面性能的影响。结果表明,打印角度对样件的力学性能影响显著,其中,0°打印的样件呈现最大拉伸和弯曲强度,分别为126.15 MPa±4.03 MPa和176.70 MPa±3.98 MPa,而以剪切强度平均值为基准,则±30°打印的样件剪切强度最大,为64.60 MPa。就失效模式而言,0°打印样件的拉伸失效模式为层内失效,呈现纤维拔出的断面形貌;90°打印样件的拉伸失效模式为层间失效,呈现PEEK基体微裂纹的断面形貌。样件的弯曲失效模式为下表面产生横断裂纹逐渐向上表面扩展。样件的剪切失效模式主要为裂纹的萌生并沿打印方向扩展,直至完全断裂。打印角度对样件的表面粗糙度、润湿性、硬度等均无显著影响。样件抛光后的表面粗糙度可达到0.22~0.28μm,完全满足骨科植入物要求。此外,样件的表面呈现亲水特性(接触角78.20°~82.72°),具有较高的硬度(邵氏D硬度72.20~75.70),可用于人工关节假体设计领域。Carbon fiber reinforced polyether ether ketone(PEEK)composite specimens were fabricated using fused deposition modeling(FDM)technology to investigate the effects of raster angles on the mechanical properties,failure modes,and surface characteristics of the specimens.The results indicate that raster angles significantly affect the mechanical properties of the specimens:0°-printed specimen exhibits the highest tensile and flexural strengths of 126.15 MPa±4.03 MPa and 176.70 MPa±3.98 MPa,respectively,while±30°-printed specimen shows the greatest shear strength of 64.60 MPa based on the average shear strength.In terms of failure modes,0°-printed tensile specimen primarily exhibits intralaminar failure with fracture section of fiber pull-out morphology,while 90°-printed tensile specimen shows interlaminar failure with fracture section of microcracking in PEEK matrix.The flexural failure mode of the specimens is that the transverse crack generated on the lower surface gradually extends to the upper surface.For shear specimens,the failure mode is characterized by crack initiation and propagation along the raster direction until complete fracture.Raster angles show no significant impacts on surface roughness,wettability or hardness,the polished specimens achieve surface roughness of 0.22-0.28μm,meeting stringent requirements for orthopedic implants.Additionally,the specimen surfaces demonstrates hydrophilic behavior(contact angle of 78.20°-82.72°)and high hardness(Shore D hardness of 72.20-75.70),indicating potential applicability in artificial joint prosthesis design.

关 键 词：熔融沉积成型 碳纤维增强聚醚醚酮复合材料 打印角度 力学性能 失效模式 表面性能 

分 类 号：TH14[一般工业技术—材料科学与工程]