Materials Literature
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This article describes an RF microstrip X-junction model enhancement technique for circuit CAD/CAM software. An example of EM-field modeling results usage for schematic model accuracy improvement was shown. The new model usage boundaries where calculated and tested. Описано спосіб покращення мікросмугової радіочастотн…
Fazne ravnoteže u Bi-Cu-Ni ternarnom sistemu proucavane su\neksperimentalnim metodama (SEM-EDS, DTA i DSC), kao i analiticki primenom\nCALPHAD metode.\nProracun ravnotežnih faznih dijagrama u Bi-Cu-Ni sistemu izveden je na osnovu\noptimiziranih termodinamickih parametara za sastavne binarne sisteme i dodatnih\ntermodi…
Performance evaluation of non-chromium corrosion inhibiting compounds incorporated into aerospace epoxy primers is a challenge. There is a lack of correlation between efficient analytical techniques and industry standard tests such as ASTM B 117 and in-service data. The goal of this project is to develop screening too…
На примере системы магнетит-золото-гидротермальный раствор продолжено изучение двойственности коэффициентов распределения микроэлементов в системах с реальными кристаллами. Показана роль поверхностной неавтономной фазы (НФ) в поглощении золота. Коэффициент распределения структурной примеси золота между магнетитом и ги…
In this paper, carbon blacks (CB) and charcoal powders (CP) were used as conductive fillers for fabricating conductive polymer composites. Those carbon fillers were dispersed into high density polyethylene (HDPE) by a melt compounding method using a twin screw extruder. The resulting composite with pellet shape was us…
Waterborne overprint varnish (OPV) has a significant role in the graphic arts industry. Some of the polymers used in this coatings industry segment are non-film formers at room temperature. A plasticizer and/or a coalescent is required to help form a film properly to ensure full development of performance properties w…
This study investigates the fire behavior properties of photocurable thiol-ene networks. The ability to tune thermal stability parameters and fire performance indices is demonstrated by simply mixing and matching various thiol and ene monomers during network fabrication. Cone calorimetry experiments performed at diffe…
While polymeric coatings serve many useful functions, continuous needs for engineering of new devices or objects require the development of coatings materials that exhibit unique, adaptive, self-regulating functions, operating in an unprecedented, autonomous manner. To achieve these attributes, orchestrated nano or sm…
Today’s regulations demand lower solvent emissions to minimize the Volatile Organic Compounds (VOCs) and environmental impact caused by the manufacture, application, and cure of coatings. In an effort to accomplish this objective, a number of methods have been deemed appropriate. One of these approaches involves an en…
The problem of thermo—mechanical fatigue (TMF) of single crystal turbine blades has not been fully investigated neither theoretically nor experimentally. In the present work TMF tests were performed for two single crystal nickel-based alloys with various crystallographic orientations (<001>, <011>, <111}) under differ…
Changing environmental regulations, market needs, and materials of construction continuously drive the evolution of aerospace coatings and application processes. Boeing actively pursues a continuous improvement strategy for its products to meet these changing demands. This strategy is based on extensive internal R&D p…
The object of the article is the retainer as a part of bearing part is gas-turbine engine compressor. For the general case of loading there is shown a classification of stressing affected on elements of bearing part. It has been investigated seal spacing in three front-radial and one labyrinth sealing retainers. Due t…
Afterburning turbofan vibration /tight research with the help of flexile ceramics vibration ріскир installed іп standard engine measurement place on the intermediate casing have being demonstrated high diagnostic effect. Using while data processing wide spread frequency vibration signal, special program-apparatus comp…
The new method of definition of the stress-strained state of elastic elements of the structures of modern technics is is suggested. The numerical-analytical RVR-method which is used in work is based on Reissner’s variational principle, I.N.Vekua's method, R-functions theory and common equations of three-dimensional th…
Finite element modeling of a part roller burnishing process is made and the stressed-strained state in the strengthened part is determined. The method of the through-thickness residual stress distribution improvement in a surface layer of the strengthened part is proposed.
Recent advances have shown that it is possible to provide outstanding corrosion resistance of metal with waterborne paint resins. Specifically, paints based on one-component waterborne polyurethanes (PUDs) can protect metal surfaces and keep them looking good for an extended period of time. In addition, paints based o…
Викладено результати аналізу формування ядра ущільнення при руйнуванні середовища та визначення залежностей геометрії (висоти) ядра ущільнення від фізико-механічних властивостей атомарних структур середовища і технологічних характеристик ріжучого інструменту
A variety of ways to invest building today is an occasion for a detailed analysis of the financial and credit mechanisms. Selection of optimal financing schemes and tax planning in the implementation of construction projects is the key to efficiency and profit from the activity.
Alkyl silicones have been found to be very effective at surface modification of oils and esters. By using a small amount of these alkyl silicones, the surface tension of these oils and esters can be lowered to 20–22 dynes/cm which is almost the same as silicone oil. We will investigate using these silicones in high so…
Проведено моделювання операції нарізання евольвентних зубчастих коліс дисковими фрезами під час інтегрованого застосування процесів радіально-колового зубонарізання дисковою фрезою та копіювання за безперевного ділення. Процес дає змогу підвищити продуктивність та досягнути необхідної точності профілю зубців колеса. T…