Krzysztof Gocman
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View article: Role of Base Grease Type on the Lubrication Performance of Hexagonal Boron Nitride Nanoparticles and Microparticles
Role of Base Grease Type on the Lubrication Performance of Hexagonal Boron Nitride Nanoparticles and Microparticles Open
This study investigates the influence of hexagonal boron nitride (h-BN) particle size and concentration on the tribological performance of lithium and calcium greases. Formulations containing h-BN nanoparticles and microparticles at 1%, 3%…
View article: Effect of Nanoparticles and Microparticles of Hexagonal Boron Nitride on Structure, Thermal and Mechanical Stability of Lithium and Calcium Greases
Effect of Nanoparticles and Microparticles of Hexagonal Boron Nitride on Structure, Thermal and Mechanical Stability of Lithium and Calcium Greases Open
Hexagonal boron nitride is being considered as an additive for greases due to its structure and physical and chemical properties. In the context of the application of such lubricants in real tribological systems, it is important to recogni…
View article: Permeability and Load Capacity of Iron Porous Bearings with the Addition of Hexagonal Boron Nitride
Permeability and Load Capacity of Iron Porous Bearings with the Addition of Hexagonal Boron Nitride Open
Due to their properties, porous sliding bearings are considered to be maintenance-free, which means that no lubrication is required during operation. Their design enables operation at low rotational speeds with high load. Another effect of…
View article: Hexagonal Nano and Micro Boron Nitride: Properties and Lubrication Applications
Hexagonal Nano and Micro Boron Nitride: Properties and Lubrication Applications Open
The article presents a discussion on the use of hexagonal boron nitride as an additive to lubricants. Based on the analysis of the research, factors determining its application were identified. These include particle size distribution, the…
View article: Hot isostatic pressing influence on the mechanical properties of selectively laser-melted 316L steel
Hot isostatic pressing influence on the mechanical properties of selectively laser-melted 316L steel Open
Industries that rely on additive manufacturing of metallic parts, especially biomedical companies, require material science-based knowledge of how process parameters and methods affect the properties of manufactured elements, but such phen…
View article: An Evaluation of Lubricating Properties of CuO and h-Boron Nitride (h-BN)
An Evaluation of Lubricating Properties of CuO and h-Boron Nitride (h-BN) Open
The purpose of this paper is to study the tribiological behavior of (steel/porous iron), (steel/steel) and (steel/bronze) tribopair with micellar copper oxide, hexagonal boron nitride (h-BN), Lithium grease Liten LT43 and base oil, transfo…
View article: Experimental studies of electrorheological properties of lubricating oils containing ionic liquid. Part 3. Microscopic examination of the ER effect mechanism
Experimental studies of electrorheological properties of lubricating oils containing ionic liquid. Part 3. Microscopic examination of the ER effect mechanism Open
The article presents the results of in situ microscopic observations of quasihomogenic mixtures of hydrocarbon oils containing ionic liquids. Observations were made using NIKON ECLIPSE LV 100 D optical microscope. The mechanism of generati…
View article: Comparison of Different Heat Treatment Processes of Selective Laser Melted 316L Steel Based on Analysis of Mechanical Properties
Comparison of Different Heat Treatment Processes of Selective Laser Melted 316L Steel Based on Analysis of Mechanical Properties Open
In this study, we analyzed the mechanical properties of selectively laser melted (SLM) steel obtained via different modifications during and after the manufacturing process. The aim was to determine the effects of precipitation heat treatm…
View article: Effect of Process Parameter Modification and Hot Isostatic Pressing on the Mechanical Properties of Selectively Laser-Melted 316L Steel
Effect of Process Parameter Modification and Hot Isostatic Pressing on the Mechanical Properties of Selectively Laser-Melted 316L Steel Open
Industries that rely on additive manufacturing of metallic elements, especially biomedical companies, require material science-based knowledge of how process parameters and methods affect element properties, but such phenomena are incomple…
View article: Influence of Selective Laser Melting Technological Parameters on the Mechanical Properties of Additively Manufactured Elements Using 316L Austenitic Steel
Influence of Selective Laser Melting Technological Parameters on the Mechanical Properties of Additively Manufactured Elements Using 316L Austenitic Steel Open
The main aim of this study was to investigate the influence of different energy density values used for the additively manufactured elements using selective laser melting (SLM).The group of process parameters considered was selected from t…
View article: Influence of Selective Laser Melting Technological Parameters on the Mechanical Properties of Additively Manufactured Elements Using 316L Austenitic Steel
Influence of Selective Laser Melting Technological Parameters on the Mechanical Properties of Additively Manufactured Elements Using 316L Austenitic Steel Open
The main aim of this study is to investigate the optimization of the technological process for selective laser melting (SLM) additive manufacturing. The group of process parameters considered was selected from the first-stage parameters id…
View article: Research on tribological properties of oil containing graphene oxide or hexagonal boron nitride
Research on tribological properties of oil containing graphene oxide or hexagonal boron nitride Open
The aim of this publication is to present the results of studies on the SN-650 oil base with various concentrations of graphene oxide (GO), reduced graphene oxide (rGO) produced by the Institute of Electronic Materials Technology in Warsaw…
View article: Tribological properties of grease containing graphene oxide or hexagonal boron nitride
Tribological properties of grease containing graphene oxide or hexagonal boron nitride Open
The purpose of this paper is to present the results of research of tribological behavior of basic greases (of 2. NLGI class) including different mass concentration concentration (0.05%, 0.1%, 0.2%, 0.5%, 1%, 2%) of additives: graphene oxid…
View article: Evaluation of tribological properties of lubricants based on Hersey’s–Stribeck’s characteristics
Evaluation of tribological properties of lubricants based on Hersey’s–Stribeck’s characteristics Open
The content of the paper presents the results of investigations of selected lubricants. The study led to obtaining Hersey’s-Stribeck’s curves and to comparison of the lubricating properties of lubricants belonging to different groups such …
View article: The comparative study of polymers for sliding pairs with UNMT (Universal Nano/Micro Tester)
The comparative study of polymers for sliding pairs with UNMT (Universal Nano/Micro Tester) Open
In the article the results of comparative research of eight types of polymers, used in sliding pairs, are presented. For the selected polymers mechanical properties and then also their tribological characteristics were examined with UNMT (…
View article: Prediction of synthetic oil parameters by artificial neural networks at durability tests of porous bearings; pp. 123–131
Prediction of synthetic oil parameters by artificial neural networks at durability tests of porous bearings; pp. 123–131 Open
In this article we use artificial neural networks (ANN) in durability analysis of porous bearings. First, we present briefly the results of durability tests of porous sleeves impregnated with synthetic ester oil under different duration of…