Structure and microhardness of HEA –TiB2 composite coating deposited by cold gas dynamic spraying

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dc.contributor.advisorЮркова, Олександра Іванівна
dc.contributor.authorLan, Jinlong
dc.date.accessioned2023-05-15T08:06:59Z
dc.date.available2023-05-15T08:06:59Z
dc.date.issued2021
dc.description.abstractotherThe purpose of the study is to prepare HEA–ceramic composite coatings by cold-spraying and to investigate the structure, phase composition, microhardness. In order to achieve this purpose it is necessary to decide the following: 1) To select and validate the chemical composition of high-entropy alloy and the powder mixture for HEA-ceramic coatings; 2) To prepare AlNiCoFeCr HEA by mechanical alloying in a planetary mill, powder mixture, steel substrates and HEA-ceramic coating by cold spraying; 3) To study HEA powders, HEA–ceramic mixture and HEA–ceramic coatings; 4) To investigate the structure, phase, chemical composition and microhardness of cold-sprayed HEA-ceramic coating on steel substrate. Research methods and equipment: a planetary ball milling (Retsch PM100) was used for mechanical alloying. Spraying was performed on a DYMET 405 equipment. The structure and phase composition were studied using a SEM( REMMA--106И) , and an Ultima IV X-ray diffractometer f. Rigaku. Microhardness was determined by indentation on a PMT-3 device. Object of the study is the cold sprayed AlNiCoFeCr HEA–TiB2 composite coatings. Subject of study is the formation of structure, phase and chemical composition as well as microhardness of cold sprayed HEA–TiB2 composite coatings on steel substrate. Scientific novelty of the results: This wok for the first time proves that solid-state CS technology is promising for the fabrication of thick HEA-ceramic coating while retaining the starting phases in the coating for using the advantage of interesting properties of HEA and ceramic in the form of coatings.uk
dc.format.extent149 p.uk
dc.identifier.citationLan Jinlong. Structure and microhardness of HEA –TiB2 composite coating deposited by cold gas dynamic spraying : Master's thesis : 132 Materials Science / Lan Jinlong. - Київ, 2021. - 149 p.uk
dc.identifier.urihttps://ela.kpi.ua/handle/123456789/55669
dc.language.isoenuk
dc.publisherIgor Sikorsky Kyiv Polytechnic Instituteuk
dc.publisher.placeKyivuk
dc.subjectcoatinguk
dc.subjectcold sprayuk
dc.subjecthigh entropy alloyuk
dc.subjectmechanical alloyinguk
dc.subjectmechanical propertiesuk
dc.subjectphase compositionuk
dc.subjectpowderuk
dc.subjectsolid solutionuk
dc.subjectstructureuk
dc.titleStructure and microhardness of HEA –TiB2 composite coating deposited by cold gas dynamic sprayinguk
dc.typeMaster Thesisuk

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