PRODUCTION OF SHAPE MEMORY ALLOYS BASED ON THE NI-TI-CU SYSTEM BY COMBINED POWDER METALLURGY METHODS

Abstract

The article discusses modern methods of powder metallurgy, such as mechanosynthesis and spark plasma sintering (SPS), used to produce shape memory alloys (SMA) based on the Ni-Ti-Cu system. Shape memory alloys are widely used in many fields, from medicine to the aerospace industry, due to their unique properties such as superelasticity and shape memory. It is these unique properties of SMA that stimulate interest in the development of new methods for their production, such as the spark plasma sintering method. Special attention is paid to knowing everything about NiTiCu alloys: their structural, mechanical and functional characteristics; why they should be used instead of other SMAs.

The work describes in detail the stages of mechanosynthesis, including the selection of initial powders, their mechanical activation and subsequent processing. The spark plasma sintering process is also considered, which ensures high density and uniformity of the resulting materials. Special attention is paid to the influence of processing parameters on the microstructure of alloys, as well as on their phase transformations and mechanical properties.

The advantages and disadvantages of the methods are analyzed, as well as their effect on the final characteristics of alloys. The article discusses the prospects for further development of the field, as well as research on the development of new shape memory alloys and optimization of their synthesis processes using SPS. The article serves as a basis for future developments in the field of creating new functional materials with improved properties and wide application possibilities. This material will be useful for teachers, doctoral students, undergraduates and students interested in powder metallurgy, materials science and shape memory alloys.