STUDY OF THE INFLUENCE OF THE STRUCTURE OF FIBER COMPOSITES ON THEIR PERFORMANCE PROPERTIES

Abstract

Purpose. It consists in establishing the influence of continuous fibers and a sufficiently plastic matrix of heat-resistant alloy in the structure of a composite intended for work at elevated temperatures, and providing recommendations on the optimal type of structure to achieve optimal strength of this composite at temperatures of 20...1300 °С.
 Research methods. Theoretical analysis of the possible destruction of products when using continuous fibers was carried out, as well as an analysis of composite samples based on a heat-resistant matrix reinforced with a wire made of tungsten-rhenium alloy. The research was conducted using the metallographic method. The strength of the composite was determined by carrying out tensile tests using the IMASH-20-75 device.
 Results. The regularities of the influence of the structure on the strength of fibrous composites have been established, on their basis it is possible more thoroughly analyze the processes that occur both during the destruction of the composite and during its formation and, if necessary, to adjust them in such a way as to ensure the maximum possible strength of the material as a whole.
 Scientific novelty. The regularity of the effect of the general structure of the composite and the matrix surrounding the fibers on the strength of the heat-resistant alloy – tungsten-rhenium fiber composite is established, which allows quantitative analysis of the influence of structural and technological factors of the forming process on the strength of the specified material.
 Practical value. The work can be useful to designers when choosing the composition of the composite, focusing on the expected mechanism of destruction, as well as to technologists for more productive use of production equipment and reducing the consumption of materials for the production of products.