Implanting MnO2 into Hexagonal Boron Nitride as Nanoadditives for Enhancing Tribological Performance

Crystals

Oluwafunmilola Ola¹  Kunyapat Thummavichai²  Minli Zeng³  Zanhe Yang³  Linyi Zhang³  Wenting Chen³  Yanqiu Zhu³  Nannan Wang³  Shiming Yang³  Xiaorong Chen³ 

[1] Advanced Materials Group, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK;Department of Mathematics and Physical Sciences, College of Engineering, University of Exeter, Exeter EX4 4QF, UK;Guangxi Institute Fullerene Technology (GIFT), Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Resources Environment and Materials, Guangxi University, Nanning 530004, China;

关键词: hexagonal boron nitride (h-BN);    manganese dioxide;    lubricant additive;    PAO6;    tribological properties;   

DOI  :  10.3390/cryst12040451

来源: DOAJ

【 摘 要 】

Hexagonal boron nitride nanosheets (h-BNNs) show great potential in the field of tribology due to their typical two-dimensional layered structure and are essential for replacing conventional sulfur/phosphate-containing additives. However, the large particle size and poor dispersion of h-BNs seriously restrict their green lubrication application. In this paper, MnO₂@h-BNNs nanocomposites were successfully prepared by ultrasonically exfoliating a hydrothermal method. The tribological properties of MnO₂@h-BNNs nanocomposites as lubricant additives in poly-alpha-olefin oil (PAO) were investigated. The results show the oil dispersed with 0.25 wt% MnO₂@h-BNNs had the best friction reduction and antiwear effect with 42% and 11.2% reduction, respectively, compared with the plain oil. Through further wear surface analyzing, we verified the antiwear mechanism of additives in filling the micropits and grooves on the wear surface and forming a friction protection film including Fe₂O₃, MnO₂, and BN on the wear surface, avoiding direct contact between the friction subsets. This can provide ideas for other lubricating oil additives.

【 授权许可】

Unknown