Structure of VT6 – SiC composite material

Abstract

To date, the methods of additive technologies for manufacturing goods are applying more and more widely in the real sector of production and are rapidly developing. The development of various composite materials by these methods is of increased interest, since it has become possible to obtain composite materials with a different number of initial components of the matrix and reinforcer. It became possible to integrate ceramics into a metal matrix and vice versa by growing products from raw powder materials variously composed. The resultant materials may be used as a replacement for existing ones, since they have a cumulative unique set of properties that are necessary for technological and scientific expansion. Combination of well-known technologies, such as classical hot isostatic pressing, selective laser melting and ceramic fiber reinforcement, will make it possible to obtain unique composite materials. Thin-walled products from titanium alloys, including thin sections, may be obtained by the use of selective laser melting. The main problems in manufacturing of fiber-reinforced materials are setting the fibers in a given position, minimizing their displacement during consolidation, as well as limiting the matrix and fiber interaction during consolidation to prevent a reaction with the formation of an interaction zone. In order to create a new material, a silicon carbide reinforcing fiber was loaded into the shaped manufactured article, followed by encapsulated hot isostatic pressing. As a result, effective diffusion connections of individual matrix elements took place, as well as complete enveloping the fibers with the matrix material. A low-porosity structure without large defects visible on X-ray tomography was obtained.The work was carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation under the Grant agreement No. 075-11-2019-058 dated 25.11.2019 “Organization of production of locally reinforced parts made of titanium alloys operating under conditions of increased loads and temperatures for advanced aviation gas turbine engines”, approved by the Decree No. 218 of the Government of the Russian Federation.