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fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Publisher: National Aviation University
Languages: Ukrainian
Types: Unknown
Subjects: coating; discrete structure of island type; stress; elasticity modulus; strength, UDС 539.43; 539.53+623.4, покрытиe; дискретная структура островкового типа; напряжениe; модуль упругости; прочность, УДК 539.43; 539.53+623.4, покриття; дискретна структура островкого типу; напруження; модуль пружності; міцність
In order to improve the quality of coatings, a novel principle for deposition of strengthening coatings with high thermomechanical properties has been developed at Pysarenko Institute for Problems of Strength NAS of Ukraine (IPS). It consists in replacing a conventional continuous layer with a discontinuous mosaic-discrete structure. Realization of this principle in fabrication of coatings has permitted an increase in their adhesion and corrosion stability thanks to restriction of maximal stresses in both coating layer and adhesion contact. The article is devoted to the development of the trend for creation of coatings with a discrete structure. As a result of the fulfillment of these tasks directed to investigation of constructive – technological methods for improvement of protective coating operability, a discrete structure of strengthening protective coatings (SPC) has been created. The discrete structure of the island type is shown to provide operability of high-modulus superhard coatings on metals and alloys with lower elasticity modulus. Under contact loads, it reduces tensile stresses by over 3 times. В статье представлено развитие направления создания покрытий дискретной структуры. Показано, что дискретная структура островкового типа позволяет обеспечить работоспособность высокомодульных сверхтвердых покрытий на металлах и сплавах с меньшими значениями модулей упругости. В условиях контактных нагрузок дискретная структура островкового типа снижает растягивающие напряжения более, чем в 3 раза. У статті подано розвиток напряму створення покриттів дискретної структури. Показано, що дискретна структура островкого типу дозволяє забезпечити працездатність високомодульних надтвердих покриттів на металах і сплавах з меншими значеннями модулів пружності. В умовах контактних навантажень дискретна структура островкового типу знижує напруження розтягу більш, ніж в 3 рази.
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