Mechanical properties and microstructure characteristics of lattice-surfaced PEEK cage fabricated by high-temperature laser powder bed fusion  

作　　者：Peng Chen Jin Su Haoze Wang Lei Yang Haosong Cai Maoyuan Li Zhaoqing Li Jie Liu Shifeng Wen Yan Zhou Chunze Yan Yusheng Shi 

机构地区：[1]State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan,430074,China [2]School of Logistics Engineering,Wuhan University of Technology,Wuhan,430081,China [3]Faculty of Engineering,China University of Geosciences,Wuhan,430079,China

出　　处：《Journal of Materials Science & Technology》2022年第30期105-117,共13页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.52105341);the China Postdoctoral Science Foundation(No.2020M682406);Post-Doctoral Innovative Research Post of Hubei Province(No.257963);the Fundamental Research Funds for the Central Universities(Nos.2019kfyRCPY044and 2021GCRC002);the Program for HUST Academic Frontier Youth Team(No.2018QYTD04);the Guangdong Provincial Enterprise Key Laboratory for 3D Printing Polymer and Composite Materials(No.2018B030323001);the Wenzhou Industrial Science and Technology Project(No.ZG2020048)。

摘　　要：Porous structure design on the contact surface is crucial to promote the osseointegration of the intervertebral cage while preventing subsidence and displacement.However,the stress response will undergo significant changes for the current random porous cages,which can directly affect the mechanical properties and long-term usability.Here,this paper proposed a newly designed polyetheretherketone(PEEK)cage with the triply periodic minimal surface(TPMS)-structured lattice surfaces to provide tailored 3 D microporosity and studied the mechanical performance,stress/strain responses,and microstructure changes in depth.The lattice-surfaced PEEK cage mainly exhibits a multiple-point-plane stress transfer mechanism.The compression modulus and elastic limit can be adjusted by controlling the area of the Diamond TPMS surface while the energy absorption efficiency remains stable.The microstructure of high-strength PEEK is featured by the radial pattern morphology.Meanwhile,the double-stranded orthorhombic phase is more ordered,and the benzene plane subunit and lattice volume become more expanded.

关 键 词：Additive manufacturing Laser powder bed fusion POLYETHERETHERKETONE Intervertebral cage Mechanical properties 

分 类 号：TQ317[化学工程—高聚物工业]