Microscopic feature and high temperature bending properties of carbon fiber/Al composites with laminated stitch structure

LAN Zeyu; YU Huan; XU Zhifeng; WANG Zhenjun; CAI Changchun; FENG Jingpeng

doi:10.13801/j.cnki.fhclxb.20201124.001

Volume 38 Issue 9

Sep. 2021

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LAN Zeyu, YU Huan, XU Zhifeng, et al. Microscopic feature and high temperature bending properties of carbon fiber/Al composites with laminated stitch structure[J]. Acta Materiae Compositae Sinica, 2021, 38(9): 2979-2988. doi: 10.13801/j.cnki.fhclxb.20201124.001

Citation:

LAN Zeyu, YU Huan, XU Zhifeng, et al. Microscopic feature and high temperature bending properties of carbon fiber/Al composites with laminated stitch structure[J]. Acta Materiae Compositae Sinica, 2021, 38(9): 2979-2988. doi: 10.13801/j.cnki.fhclxb.20201124.001

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Microscopic feature and high temperature bending properties of carbon fiber/Al composites with laminated stitch structure

doi: 10.13801/j.cnki.fhclxb.20201124.001

Key Discipline Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang 330063, China

Received Date: 2020-09-30
Accepted Date: 2020-11-15

Available Online: 2020-11-24

Publish Date: 2021-09-01

Abstract

Abstract

The M40J carbon fiber (C_f) was woven into preform with laminated stitch structure, and the C_f/Al composites were prepared by the vacuum pressure infiltration method. The bending tests were carried out at high temperature (350℃, 400℃). The element distribution, phase composition, microstructure and interface characteristics were observed and analyzed by SEM, TEM, EDS and XRD. The bending properties of C_f/Al composites at high temperature were studied, and their failure mechanisms were discussed. The results show that the interface between matrix and reinforcement is clear and close. The matrix in the composites is subjected to residual tensile stress. The bending strength and modulus of C_f/Al composites at 350℃ are 175.2 MPa and 90.1 GPa, respectively, and are 160.8 MPa and 87.5 GPa at 400℃. The bending strength of C_f/Al composites with laminated stitch structure does not decrease significantly with the increasing temperature. The high temperature stability of C_f/Al composites with laminated stitch structure is better than that of other braided structures. When the material bending fails at high temperature, it is subjected to the combined effects of tension and compression. The failure modes are matrix cracking and partial fiber fracture. The main factors are matrix softening and decrease of interfacial bonding strength.
- high temperature,
- laminated stitch,
- microstructure,
- interface,
- bending strength,
- failure mechanism
Long Abstrsct
Innovation Points

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References(21)

References

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