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The effect of hexagonal boron nitride additive on the effectiveness of grease-based lubrication of a steel surface

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Purpose ‐ The purpose of this paper is to study the sliding and the vibrating fretting tests mechanism of h-BN micro-particles when used as a lubricating grease-2 additive. Design/methodology/approach ‐ The fretting tests were conducted on steel/steel contacts using both vibrating fretting apparatus and the shaft-sleeve slide fitted tester. The wear scars were characterized with profilometry. The tribological properties of grease-2 compounded with h-BN additive were also compared to those obtained for the commercial product Militec-4. Findings ‐ The experiment showed significant differences between the results obtained from the vibrating fretting and the shaft-sleeve sliding fitted tests. Adding h-BN to the lubricant leads to a better performance in the shaft-sleeve slide regime than in the steel/steel vibrating test condition. Originality/value ‐ The results of the experimental studies demonstrate the potential of h-BN as an additive for preventing fretting sliding, and can very useful for further application of compound grease-2 with h-BN additive in industrial equipment.
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Keywords: Additives; Fretting; Friction; Grease; Lubrication; Steel

Document Type: Research Article

Publication date: March 2, 2012

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