In this study we present a successful combination of DLC coatings and steel lubricated by WS2, MoS2 and graphene nanoparticles. To clarify the mechanisms of this physically-based lubrication technology, we have investigated, on individual contacts, how different surface roughness, running-in, lubrication regime and concentration influence the lubrication performance of the nanoparticles mixed with PAO oil. The performance of the DLC/DLC contacts is directly compared to steel/steel contacts. The friction is always significantly reduced when nanoparticles are used, irrespective of the type of nanoparticles, and material in contact. However, the performance of different nanoparticles varies between different materials and lubrication regimes.
B.04 Guest lecture
COBISS.SI-ID: 14636827In order to reduce losses in a piston machine due to resistance of the lubricant against displacing the piston (1) furnished with at least piston ring (3, 3', 3") along the cylinder (2), and consequently to improve efficiency of operation of such machine, the invention proposes a piston ring (3, 3', 3"), which is furnished with a DLC-coating (31) on its peripheral surface (30), wherein said DLC-coating (31) contains 2 - 20%, in particular 2 - 25% of fluorine with respect to total weight of the DLC-coating (31). The invention also relates to a piston (1), which is furnished with such piston ring (3, 3', 3"), as well as to a piston machine comprising at least one piston (1) furnished with at least one piston ring (3, 3', 3") furnished with such DLC-coating (31) containing 2 - 20%, in particular 2 - 25% of fluorine with respect to the total weight of the DLC- coating (31), wherein the piston machine is either a driving machine like an internal combustion engine, or a driven machine, like a pump or a compressor.
F.32 International patent
COBISS.SI-ID: 13744667Doctoral students are one of the main supporting pillars of research work. Their ambition and guaranteed quality, goal oriented time allow them to delve into the tiniest specifics of their chosen research problems. Rarely does someone have enough time and commitment later in life to pay such attention to the details as the doctoral students do. Usually, most researchers are defined by their doctoral thesis work in their later years, often even throughout the whole career. It is for this reason, and because of the influence and support from mentors and other co-workers, that important scientific work and discoveries are often found in doctoral theses. The combination of the individual doctoral student, mentor and doctoral thesis or project content represents one of the basic scientific elements, which leads to new realisations and defines the scientific success in the academic world. The ability to form such a connection is among the most important external factors in the academic-research sphere. Therefore the issue of doctoral students funding system raises many questions, approvals and disapprovals all around the globe, as well as in Slovenia. However, academic systems should not be changed too often, as the time constants of influences and effects are quite long, so all changes should be introduced in a premeditated manner.
B.05 Guest lecturer at an institute/university
COBISS.SI-ID: 15069467Prof. Kalin is also initiator and coordinator of prestigious Erasmus Mundus Joint Eurpean Master programme “TRIBOS Tribology of surfaces and Interfaces”, which obtained funding from EC EACEA in amount of 4.5 M€ for 5 years. This unique international programe in Tribology is estabished together with University of Leeds, Luleo University of Technology and Coimbra University. He is the only coordinator of such European joint programme at the whole University of Lubljana (50.000 students). He also achieved accreditation of this programme by national accreditation body NAKVIS and Ministry of Education in 2013 and so he established a completely new European Joint Master programme in Tribology of surfaces and Interfaces at Faculty of Mechanical Engineering. The first generation of students from 11 countries worldwide is currently attending second semester in Ljubljana.
B.05 Guest lecturer at an institute/university
COBISS.SI-ID: 15170587In 2012, prof. Kalin became Editor-In-Chief of Lubrication science (John Wiley & Sons, Ltd.), the only tribology journal fully specialised in lubrication with SCI impact factor. There are only few tribology journals with SCI IF, which gives the emphasis to the meaning and importance of Editor position in the field of Tribology. Prof. Kalin succeed prof. Spikes, an eminent tribologists, after 20 years of his devoted editorial work. Prof. Kalin is/was also involved in several other tribology journals. He was an Associate editor in one of the most fundamental and respected tribological journals, i.e. Journal of Tribology (2006-2012). Currently, he still serves as a member of 6 other Editorial boards: Industrial Lubrication and Tribology, Advances in Tribology, ISRN Mechanical Engineering, Advances in Mechanical Engineering, Lubricants, and The Scientific World journal. He was also several times acting as guest editor for respected tribological journals Tribology international, and Lubrication science.
C.01 Editorial board of a foreign/international collection of papers/book
COBISS.SI-ID: 2144539