https://zealpress.com/jms/index.php/jmmet/issue/feed 2025-05-20T15:34:22+00:00 Open Journal Systems <p>Journal of Modern Mechanical Engineering and Technology is a refereed journal dedicated to the publication of high-quality papers providing the latest and outstanding information in all areas of Mechanical Engineering. It provides the authoritative settings for researchers and scholars worldwide to promote, share, and discuss various new issues and developments in different areas of Mechanical Engineering.</p> https://zealpress.com/jms/index.php/jmmet/article/view/655 2025-05-20T15:34:22+00:00 Igor Grishnyaev iisi@inbox.ru

<p>Products of fast pyrolysis of organic materials (bio-oil) have such advantages as ease of storage and transportation, production from renewable raw materials, but have not yet found wide application as motor and boiler fuels. The article describes the results of research aimed at obtaining such fuel containing petroleum fuel oil and bio-oil as the main components. Direct mixing of these components is a difficult task due to their chemical incompatibility. Its solution required the development of technology and devices, which was the purpose of the presented research results. The research methodology was based on mathematical modeling of the processes of mixing fuel components, analysis of its results, their transfer to natural samples and their experimental study. As a result, a technology and design of mixers were developed that made it possible to obtain a stable mixed fuel containing fuel oil and bio-oil in the following proportions of the mass ratio up to 50:50. The obtained results confirmed the correctness of the chosen approach, which made it possible to develop new technology and equipment to achieve the stated research goal.</p>

2025-07-07T00:00:00+00:00 Copyright (c) 2025 Journal of Modern Mechanical Engineering and Technology https://zealpress.com/jms/index.php/jmmet/article/view/648 2025-03-13T19:19:41+00:00 V.V. Shchepetov vvs2020@ukr.net N.M. Fialko serhiibys@ukr.net S.S. Bys serhiibys@gmail.com

<p>The results of tests under boundary friction conditions are present detonation coatings Zr-Al-B in a wide range of changes in friction conditions.</p> <p>The obtained results were compared with the parallel tested coatings based on tungsten carbide type WK-15, also with samples of 30HGSNA steel and BrOCS6-6-3 bronze.</p> <p>The qualitative and quantitative composition of surface layers participating in boundary friction conditions was assessed using modern physical methods of analysis. Profilograms and microphotographs of friction surfaces of amorphous-crystalline coatings are presented, showing that under boundary friction conditions, coating samples are smoothed, which leads to a decrease in roughness.</p> <p>Installed the presence of the formation of solid solutions of oxygen interstitialization in zirconium, which corresponds to the formation of secondary structures of the first type on friction surfaces, the characteristic feature of which is their surface localization, ultra-dispersed structure, the ability to minimize destruction and screen unacceptable adhesive phenomena. Using Auger electron microscopy, it was confirmed that oxygen completely replaces sulfur in surface structures.</p> <p>It is shown that the studied detonation coatings Zr-Al-B, developed for practice, have high tribotechnical characteristics in the entire range of tests under boundary friction conditions. At the same time, as a result of studies of the mechanism of tribochemical transformations of hydrocarbons and the properties of transformed surface films, it was established that they retain lubricating properties and provide high antifriction characteristics of the friction system in the entire wide range of changes in boundary friction conditions.</p>

2025-04-10T00:00:00+00:00 Copyright (c) 2025 Journal of Modern Mechanical Engineering and Technology