海水润滑下SiN-hBN复合陶瓷轴承对GCr15的摩擦学性能

Tribological Properties of SiN-hBN Composite Ceramics Bearing on GCr15 under Seawater Lubrication.

作者信息

Han Fang, Wen Huaixing, Sun Jianjian, Wang Wei, Fan Yalong, Jia Junhong, Chen Wei

机构信息

College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China.

出版信息

Materials (Basel). 2020 Jan 31;13(3):635. doi: 10.3390/ma13030635.

DOI:10.3390/ma13030635

PMID:32023905

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7040823/

Abstract

This paper concerns a comparative study on the tribological properties of SiN-10 vol% hBN bearing on GCr15 steel under seawater lubrication and dry friction and fresh-water lubrication by using a pin-on-disc tribometer. The results showed that the lower friction coefficient (around 0.03) and wear rate (10 mm/Nm) of SN10/GCr15 tribopair were obtained under seawater condition. This might be caused by the comprehensive effects of hydrodynamics and boundary lubrication of surface films formed after the tribo-chemical reaction. Despite SN10/GCr15 tribopair having 0.07 friction coefficient in the pure-water environment, the wear mechanismsits were dominated by the adhesive wear and abrasive wear under the dry friction conditions, and delamination, plowing, and plastic deformation occured on the worn surface. The X-ray photoelectron spectroscopy analysis indicated that the products formed after tribo-chemaical reaction were FeO, SiO, and BO and small amounts of salts from the seawater, and it was these deposits on the worn surface under seawater lubrication conditions that, served to lubricate and protect the wear surface.

摘要

本文通过销盘摩擦磨损试验机，对GCr15钢上的SiN-10体积% hBN轴承在海水润滑、干摩擦及淡水润滑条件下的摩擦学性能进行了对比研究。结果表明，SN10/GCr15摩擦副在海水条件下获得了较低的摩擦系数（约0.03）和磨损率（10 mm/Nm）。这可能是由摩擦化学反应后形成的表面膜的流体动力学和边界润滑综合作用导致的。尽管SN10/GCr15摩擦副在纯水环境中的摩擦系数为0.07，但在干摩擦条件下其磨损机制以粘着磨损和磨粒磨损为主，磨损表面出现分层、犁削和塑性变形。X射线光电子能谱分析表明，摩擦化学反应后形成的产物为FeO、SiO和BO以及海水中的少量盐分，正是海水润滑条件下磨损表面上的这些沉积物起到了润滑和保护磨损表面的作用。