A fundamentally new technological method for obtaining functionally graded materials (FGM) for aircraft engines is being developed by scientists from the Far Eastern Federal University (FEFU) with specialists from Institute No. 2 “Aircraft, Rocket Engines and Power Plants” of the Moscow Aviation Institute (MAI). Using modern methods of diffusion sintering, scientists have obtained a strong composite of five different metals. The research is carried out under the state order of the Ministry of Science and Higher Education of the Russian Federation and published in the international journal Coatings.
“Together with our colleagues, we are solving a complex fundamental problem by studying new mechanisms for connecting materials that are heterogeneous in nature in a layered FGM. Metals, alloys and ceramics have different coefficients of thermal linear expansion, due to which, at the interface of contacts with each other, they destroy the composite during compression or destruction.
The system of binder and damper components developed by us using modern sintering technology eliminates mechanical damage and preserves the integral shape of the composites, ”said Evgeny Papynov, head of scientific work, deputy director for development of the Institute of High Technologies and Advanced Materials (INTiPM) FEFU.
As a result, scientists have formed a strong connection between five layers of different metals, while maintaining the integrity of the entire volume of the product. In addition, they reduced the overall temperature of the process and significantly reduced the cycle time for the manufacture of FGM composite. The quality of the characteristics and operational properties of the product was confirmed by scientists using a complex of physical and mechanical tests at the Moscow Aviation Institute and the Polytechnic Institute of the Far Eastern Federal University.
In the future, the research team plans to test solutions in the manufacture of product demonstrators for gas turbine engine structural units.
