The Effect of Bismuth Content on the Microstructure and Strength of Carbon Fiber / Al-Bi Alloy Matrix Composite

Atanov, B.I.; Khokhlov, A.V.; Khasanova, E.I.; Ivanov, A.I.; Chekmazov, S.V.; Zaripov, N.G.; Shakhlevich, O.F.; Postnova, E.Y.; Galyshev, S.N.

Авторы: Atanov B.I., Khokhlov A.V., Khasanova E.I., Ivanov A.I., Chekmazov S.V., Zaripov N.G., Shakhlevich O.F., Postnova E.Yu, Galyshev S.N.
Журнал: Mechanics of Composite Materials
Том: 61
Номер: 4
Год издания: 2025
Издательство: Springer Nature
Местоположение издательства: Switzerland
Первая страница: 683
Последняя страница: 698
DOI: 10.1007/s11029-025-10302-w
Аннотация: The use of such elements as tin, bismuth, lead, indium, and the like as alloying elements of the aluminum matrix of carbon fiber-reinforced composites opens up great possibilities to control the properties of the interface in the composite and its mechanical properties. Today, however, their effect remains virtually unexplored. All this is a premise for the present work, which focuses on studying the microstructure and strength of a CF/Al composite depending on the Bi content in the matrix. In the first stage of the present work, the effect of Bi content on the microstructure, ultimate strength, elastic modulus, and limit of proportionality of cylindrical samples of Al-Bi alloys under tension was studied. An increase in the Bi content from 0 to 0.5 at% led to a decrease in the elastic modulus and limit of proportionality of Al-Bi alloys under tension. With an increase in the Bi content in Al-Bi alloys from 0.1 to 0.5 at%, the diameter and volume fraction of Bi particles in the alloy increased from 1.3 to 2.5 μm and from 0.21 to 0.65%, respectively. In the second stage, these alloys were used as a matrix in a continuous carbon fiber-reinforced composite. The effect of Bi content in the matrix on the microstructure of the composite was investigated using scanning electron microscopy and X-ray diffraction. The structure and thickness of the interface formed by Bi at the fiber boundaries, as well as the fracture surface were studied, and the bending strength of the composite was determined. An increase in the Bi content in the range of 0.1 to 0.5 at%. led to an increase in the composite strength from 1000 to 1400 MPa, the development of the relief of the fracture surfaces, and an increase in the work of fracture of the composite. This is most likely due to a decrease in the shear strength of the fiber/matrix interface and an increase in the compliance of the matrix and the interface.
Добавил в систему: Хохлов Андрей Владимирович

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