Study of the Effect of the Fractional Composition of a SiC Reinforcing Phase on Mechanical and Thermophysical Characteristics of a Metallic Composite Material Based on an Aluminum Al–Si Alloy

This article presents the results of a study of the effect of a matrix alloy on the thermophysical characteristics of a metallic composite material (MCM) based on the aluminum Al–Si cast alloys (grades AK5 and AK12) reinforced with silicon carbide particles in a volume content of (69 ± 1) vol %. The MCM was fabricated by vacuum–compression impregnation. The results of the study of the following thermophysical characteristics of the material are presented: thermal conductivity, the linear thermal expansion coefficient (LTEC), density, porosity, and specific surface. At the end of the article, conclusions are formulated and it is shown that the thermophysical characteristics depend on the structural features and fabrication methods of a composite material.