Abstract
Theregularitiesof the formation of plasma coatings obtained from powders based on the Fe-Al system synthesized by the reaction mechanical alloying method are established. The influence of the processing modes of the compositions in the mechanoreactor on the properties of coatings is revealed. An effective method for controlling the porosity of coatings from developed powders based on a change in the power consumed by the installation is proposed.Plasma coatings have a nonequilibrium phase composition, which, in contrast to the equilibrium one, contains a wide range of metal oxides of the base and alloying elements formed during the spraying. The coating retains submicra – microcrystalline type of structure of powders with a highly developed grain and subgrain boundary. The basis of the coating is intermetallic FeAl. The role of hardening phases is played by ultrafine compounds of intermetallics and oxides.Powder annealing has a significant effect on the structure and properties of coatings and, first of all, on layers from compositions with complex alloying with oxides. Heat treatment increases the density and hardness of coatings and reduces porosity. The study of coating samples after high temperature indicates high heat resistance and the preservation of the microcrystalline type of structure of their bases.
Highlights
Плазменные покрытия имеют неравновесный фазовый состав, который в отличие от равновесного включает широкую гамму оксидов металла основы и легирующих элементов, образующихся в процессе напыления
The regularities of the formation of plasma coatings obtained from powders based on the Fe-A l system synthesized by the reaction mechanical alloying method are established
An effective method for controlling the porosity of coatings from developed powders based on a change in the power consumed by the installation is proposed
Summary
Плазменные покрытия имеют неравновесный фазовый состав, который в отличие от равновесного включает широкую гамму оксидов металла основы и легирующих элементов, образующихся в процессе напыления. Что технологии производства механически синтезированных порошков и покрытий из них находятся на стадии становления. В связи с этим достижение цели данной работы, направленной на установление закономерностей формирования фазового состава, структуры и свойс тв плазменных покрытий из ме‐ ханически легированных композиционных порошков на основе системы «железо-алюминий», является важной и актуальной.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
