Research of peculiarities of mechanical decomposition in synthesis of in-situ composites based on refractory metals

Efimochkin I.Yu., Schetanov B. V., Paegle S.V., Dvoretskov R.M.
UDC
669.046.516.2:669.018.95
DOI
10.18577/2307-6046-2018-0-4-38-50
Article PDF (Russian) (1.12 MB)
How to cite
Efimochkin I.Yu., Schetanov B. V., Paegle S.V., Dvoretskov R.M. Research of peculiarities of mechanical decomposition in synthesis of in-situ composites based on refractory metals // Proceedings of VIAM. 2018. No. 4. DOI: 10.18577/2307-6046-2018-0-4-38-50. URL: https://test.viam.ru/en/journal/2018/4/5
Keywords
high-temperature composite materials, mechanical alloying, powder metallurgy, heat resisting alloys.
Abstract

The article describes the method of mechanical alloying as an alternative for obtaining high-temperature materials based on niobium, the obtaining of which by traditional methods (casting technologies) entails great difficulties. Particular attention was paid to the control of intermediate operations related to the process of mechanical alloying. The evolution of the microstructure, phase and granulometric compositions of composite powders (CP) of the Nb–Si–Ti system at various stages of mechanical doping is considered. It is established that the process of mechanical doping consists of two processes: the actual alloying process, which is controlled by the time of powder formation with the X-ray amorphous structure and the process of creating a fractional composition controlled by a histogram of powder distribution in size. The choice of the most effective method of quality control of alloying KP was made. This method is XRF, the criterion of which is the amorphization of the structu

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