Microstructure and Properties of Domestic M55J Carbon Fiber 3D-braided C<sub>f</sub>/Al Composites

Gu Shu; Cai Changchun; Yu Huan; Xu Zhifeng; Wang Zhenjun; Li Yang

doi:10.15980/j.tzzz.2022.05.020

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Microstructure and Properties of Domestic M55J Carbon Fiber 3D-braided C_f/Al Composites
Vol. 42, Issue 5, Pages: 621-627(2022)
Published： 2022 ，
DOI： 10.15980/j.tzzz.2022.05.020

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Gu Shu, Cai Changchun, Yu Huan, et al. Microstructure and Properties of Domestic M55J Carbon Fiber 3D-braided C_f/Al Composites. [J]. Special Casting & Nonferrous Alloys 42(5):621-627(2022)
DOI：

Gu Shu, Cai Changchun, Yu Huan, et al. Microstructure and Properties of Domestic M55J Carbon Fiber 3D-braided C_f/Al Composites. [J]. Special Casting & Nonferrous Alloys 42(5):621-627(2022) DOI： 10.15980/j.tzzz.2022.05.020.

摘要

以国产碳纤维M55J为增强体材料，ZL301为基体合金，采用真空压力浸渗法制备三维五向M55J/Al基复合材料，对其致密度、微观组织以及拉伸性能进行研究，并将纤维从复合材料中提取观察分析纤维的损伤情况。结果表明，三维五向M55J/Al复合材料的致密度较高，达到97.8%

浸渗效果良好。浸渗后M55J纤维单丝平均抗拉强度为3 440 MPa

平均弹性模量为513 GPa

较原丝均有所下降。三维五向M55J/Al复合材料在室温及350℃下的抗拉强度分别为601.3和689.7 MPa

弹性模量分别为181.6 GPa和146.7 GPa

高温强度较高可能是由于高温使得基体对编织纱的束缚减小，拉伸过程无明显的屈服与颈缩现象。

Abstract

Taking domestic carbon fiber M55 J as reinforcement and ZL301 as matrix alloy

three-dimensional five-directional M55 J/Al composites were fabricated by vacuum pressure infiltration method. The compactness and microstructure of the composites as well as the tensile properties were investigated at room temperature and high temperature（350 ℃）. The fiber dimension was extracted from the composites to observe and analyze fiber damage. The results indicate that the compactness of the three-dimensional five-directional M55 J/Al composite is 97.8% with desirable infiltration effect. After impregnation

the mean tensile strength and modulus of M55 J monofilament reach 3 440 MPa and 513 GPa

respectively

which are slightly lower than those of precursor. The tensile strength and modulus of three-dimensional five-directional M55 J/Al composites are 601.3 MPa

689.7 MPa

and 181.6 GPa

146.7 GPa

respectively at room temperature and 350 ℃. The high temperature strength may be attributed to the reduced binding of matrix to braided yarn and absence of bending and necking phenomenon.