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Improvement of interleaving Aramid pulp microfibers on compressive strengths of carbon fiber reinforced polymers with and without impact

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Chinese Journal of Aeronautics 2023年第10期36卷 459-470页

作者： Fei CHENG Guangming YANG Yunsen HU Bingyan YUAN Xiaozhi HU School of Materials Science and Engineering Southwest University of Science and TechnologyMianyang 621010China Engineering Research Center of Biomass Materials Ministry of EducationSouthwest University of Science and TechnologyMianyang 621010China Department of Mechanical Engineering University of Western AustraliaPerth WA6009Australia

Compressive strengths and elastic moduli of Carbon Fiber Reinforced Polymer(CFRP)composites can be noticeably improved by multiple ultra-thin interlays with non-woven Aramid Pulp(AP)micro/nano-fibers.10-ply CFRP specimens with 0,2,4,6,8 g/m^(2)AP were tested under uniaxial compression.Those flexible AP fibers,filling the resin-rich regions and further constructing the fiber bridging at the ply interfaces,can effectively suppress delamination growth and lead to very good improvements both in the compressive strength and the elastic modulus.The CFRP specimen with an optimum interlay thickness has a distinct shear failure mode instead of the typical delamination cracking along the direction of continuous carbon fibers.Compressive Strengths After Impacts(CAI)of 12.35 J were also measured,up to 90%improvement in CAI has been observed.It is concluded those ultra-thin interlays of non-woven AP micro/nano-fibers are beneficial to design and manufacture“high strength”CFRP composites.

关键词： Compressive strength Carbon Fiber Reinforced Polymer(CFRP) Aramid pulp Interleaving interfacial reinforcing

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Advances in biocermets for bone implant applications

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Bio-Design and Manufacturing 2020年第4期3卷 307-330页

作者： Chengde Gao Meng Yao Cijun Shuai Pei Feng Shuping Peng State Key Laboratory of High Performance Complex Manufacturing College of Mechanical and Electrical EngineeringCentral South UniversityChangshaChina Institute of Bioadditive Manufacturing Jiangxi University of Science and TechnologyNanchangChina Shenzhen Institute of Information Technology ShenzhenChina NHC Key Laboratory of Carcinogenesis School of Basic Medical ScienceCentral South UniversityChangshaHunanChina

As two promising biomaterials for bone implants,biomedical metals have favorable mechanical properties and good machinability but lack of bioactivity;while bioceramics are known for good biocompatibility or even bioactivity but limited by their high brittleness.Biocermets,a kind of composites composing of bioceramics and biomedical metals,have been developed as an effective solution by combining their complementary advantages.This paper focused on the recently studied biocermets for bone implant applications.Concretely,biocermets were divided into ceramic-based biocermets and metal-based biocermets according to the phase percentages.Their characteristics were systematically summarized,and the fabrication methods for biocermets were reviewed and compared.Emphases were put on the interactions between bioceramics and biomedical metals,as well as the performance improvement mechanisms.More importantly,the main methods for the interfacial reinforcing were summarized,and the corresponding interfacial reinforcing mechanisms were discussed.In addition,the in vitro and in vivo biological performances of biocermets were also reviewed.Finally,future research directions were proposed on the advancement in component design,interfacial reinforcing and forming mechanisms for the fabrication of high-performance biocermets.

关键词： Biocermets Advantageous complementarity Fabrication methods interfacial reinforcing Bone implants

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