材料科学
复合材料
极限抗拉强度
碳纳米管
断裂韧性
韧性
模数
复合数
纤维
脆性
作者
Kangdi Zhong,Jiming Zhou,Chentong Zhao,Kang Yun,Lehua Qi
标识
DOI:10.1016/j.compositesa.2022.107201
摘要
• •The strength and Weibull modulus of carbon fiber bundles wrapped by CNTs were improved and the fiber bundles exhibited the characteristic of progressive failure during the failure process. • •The tensile strength, fracture toughness, and work of fracture of the C f /Al composites grafted with CNTs were increased by 128%, 21.6% and 113%, respectively. • •A strategy is proposed to construct an interfacial transition layer with CNTs to simultaneously strengthen and toughen composites. • •The interface transition layer acts as a “fence” to hindercracks from splitting the fiber bundle , and promoting energy dissipation through extensive debonding of the fiber bundle, which also reduces the risk of brittle fracture. In this work, a strategy is proposed to construct an interfacial transition layer with CNTs to simultaneously strengthen and toughen composites. Combining CNTs with carbon fiber reinforcements in the aluminum matrix through electrophoretic deposition, and a multiscale hierarchical C f /Al composite structure is fabricated by pressure infiltration. The mechanical response and failure modes of the composites were investigated. The results indicate that (I) both the strength and weibull modulus of fiber bundles grafting by CNTs were improved and the fiber bundles exhibited the characteristic of progressive failure during the failure process. (II) The tensile strength, fracture toughness and fracture work of the composites grafted with CNTs increased by 128%, 21.6% and 113% respectively, while the ILSS was slightly decreased. The CNTs/Al interfacial transition layer acts as a “fence” to hinder cracks from splitting the fiber bundle structure, and promoting energy dissipation through extensive debonding of the fiber bundle, which also reduces the risk of brittle fracture.
科研通智能强力驱动
Strongly Powered by AbleSci AI