Abstract
The main goal of this work was the evaluation of the interfacial strength of the carbon fibres/aluminium matrix interface dependently on the utilised composite fabrication method, namely high pressure die casting and gas pressure infiltration. In addition, the influence of a Ni-P coating on the C-fibres was investigated. The proposed measurements of the interfacial strength were carried out by means of the “push-out” method. The interfacial strength of the samples fabricated using the high-pressure infiltration method average between 19.03 MPa and 45.34 MPa.
Highlights
Metal matrix composites (MMCs) reinforced with carbon fibres are superior to traditional metal materials
MMC1 exhibits the highest interfacial by the high pressure die casting (HPDC) method, it can be found that sample MMC1 exhibits the highest interfacial strength samples
Values of the interfacial strength measured for MMC1 remain in the range of the interfacial strength of the interface recorded for, e.g., PET reinforced with glass fibres
Summary
Metal matrix composites (MMCs) reinforced with carbon fibres are superior to traditional metal materials. They can exhibit much better mechanical and thermal properties. A significant limitation of the practical applications of these composites is the lack of satisfying mechanical properties, resulting from, e.g., harmful reactions on the interface between fibres and matrix. Too high intensity of the chemical reaction leads to the formation of aluminium carbide (Al4 C3 ) precipitations on the interface. They cause a reduced fibre strength, inappropriate stress distribution around the fibres and in consequence improper crack propagation. Control of the interface strength seems to be crucial
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