Bo Liu
(, ), Jianbo Li
(, ), Zhouhang Feng
(, ), Daiyi Deng
(, ), Yitao Wang
(, ), Haiqing Wang
(, ), Yuefeng Zhang
(, ), Dong Huang
(, ), Xianhua Chen
(, ), Fusheng Pan
(, )
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引用次数: 0
摘要
采用二维正交叠层（TOL）碳纤维和Mg-4Y-2Nd-1Gd-0.5Zr （WE43）合金制备了碳纤维增强镁基复合材料（CFRMMC）。显微结构表征表明，由于Zr和稀土元素的加入，形成了原位形成的三层界面。这种界面结构明显增强了碳纤维与基体的结合，促进了外载荷作用下的有效应力松弛和应力传递。由于这种优化的界面，制备的复合材料具有优异的力学性能，同时具有高模量和导热性，其极限抗拉强度（UTS）为640.9±7.0 MPa，弹性模量（E-mod）为338.1±1.9 GPa，导热系数为376.156 W m−1 K−1。此外，考虑热失配和界面层的影响，建立了修正的tol - cfrmmc混合规则，将UTS的理论预测误差从165.1%降低到0.58%以内，进一步证明了Zr和RE元素协同效应在理论计算层面的有效性。
Preparation and mechanical properties of carbon fiber reinforced Mg-4Y-2Nd-1Gd-0.5Zr composite with in-situ formed triple-layer interface
Carbon fiber reinforced magnesium matrix composite (CFRMMC) was fabricated using two-dimensional orthogonal laminated (TOL) carbon fiber and Mg-4Y-2Nd-1Gd-0.5Zr (WE43) alloy. Microstructural characterization revealed an in-situ formed triple-layer interface because of the addition of Zr and rare earth (RE) elements. This interfacial structure apparently enhanced the bond between carbon fiber and matrix, and facilitated effective stress relaxation and stress transfer under external loading. To benefit from this optimized interface, the fabricated composite exhibited exceptional mechanical properties combined with high modulus and thermal conductivity, achieving an ultimate tensile strength (UTS) of 640.9±7.0 MPa, elastic modulus (E-mod) of 338.1±1.9 GPa, and thermal conductivity coefficient of 376.156 W m−1 K−1. Furthermore, a modified rule of mixtures for the TOL-CFRMMCs was developed by incorporating the effects of thermal mismatch and interfacial layers, reducing the theoretical prediction error of UTS from 165.1% to within 0.58%, which further demonstrated the effectiveness of the synergistic effect between Zr and RE elements at the theoretical calculation level.
期刊介绍：
Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.
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