Research on lubricity of oils containing the hexagonal boron nitride

Journal Title: Bulletin of the Military University of Technology - Year 2019, Vol 68, Issue 1

Abstract

The paper presents the test results of lubricity properties of Hydrol L-HL 32 hydraulic oil, Mobilube 1 SHC 75w-90 gear oil, and two base oils: SN-150 and SN-650, containing hexagonal boron nitride. To conduct the required tests, a four ball machine was used. This device is commonly used when assessing lubricity properties of oils and greases. The following normative lubricity parameters were defined: the value of welding point Pz [daN], the value of last non-seizing load Pn [daN], the value of seizing at smoothy growing load Pt [daN], as well as the wear limiting capacity load Goz [daN/mm2]. Furthermore, several non-normative tests were completed that covered indication of two parameters making it possible to complete an assessment of lubricity properties of oils. Based on the tests, it was determined that hexagonal boron nitride is a good additive that improves lubricity properties. Improvement in the above properties was recorded both in the case of hydraulic oil and gear oil, as well as oil bases. Relatively better improvement results were obtained in the case of oil bases, where the improvement in the results after using boron nitride, was more visible than in the case of hydraulic and gear oil. The best improvement results for hydraulic oil were obtained after adding 4% h-BN, whereas in the case of the SN-150 oil base, this value was 2% h-BN. The best improvement results for gear oil and SN-650 oil base were also obtained after adding 4% h-BN. The possibility of using the values of h-BN bigger than 4% was excluded. It was determined that bigger content of h-BN in oil generates negative effects (under four ball conditions). Keywords: tribology, lubricity, boron nitride.<br/><br/>

Authors and Affiliations

Szymon Senyk, Maciej Perehubka, Tadeusz Kałdoński

Keywords

Related Articles

Verification of the equivalent stiffness method on the example of a model study of a two-span folding beam based on fixed supports

The article covers the analysis of the equivalent stiffness method in a two-span folding beam based on fixed supports, carried out on the basis of model tests. The essence of this analysis was to check the deformation of...

Analiza dynamicznego przemieszczenia tarcz żelbetowych z betonu wysokiej wytrzymałości. Część III: Analiza dynamicznego przemieszczenia tarczy żelbetowej z betonu wysokiej wytrzymałości klasy C300

W pracy przedstawiono analizę stanu przemieszczenia prostokątnych tarcz żelbetowych wykonanych z betonu bardzo wysokiej wytrzymałości klasy C300 obciążonych dynamicznie z uwzględnieniem fizycznych nieliniowości materiałó...

3D modelling of cultural heritage objects using video technology

In the paper, the process of creating 3D models of St. Anne’s Church’s facades is described. Some examples of architectural structures inside of St. Anne’s Church’s are presented. Video data were acquired with the fixed...

Numeryczne dane wysokościowe misji TanDEM-X

Zapoczątkowana w 2010 roku misja TanDEM-X (TerraSAR-X add-on for Digital ElevationMeasurement) jest pierwszą satelitarną misją radarową, w ramach której zostały pozyskane dane interferometryczne w trybie bistatic InSAR s...

Collective protection against contamination

The paper describes general rules for the use of collective protection against contamination. There are presented certain recommendations for functional and operational requirements in the case of collective protection m...

Download PDF file
  • EP ID EP519254
  • DOI 10.5604/01.3001.0013.1476
  • Views 48
  • Downloads 0

How To Cite

Szymon Senyk, Maciej Perehubka, Tadeusz Kałdoński (2019). Research on lubricity of oils containing the hexagonal boron nitride. Bulletin of the Military University of Technology, 68(1), 131-151. https://europub.co.uk/articles/-A-519254