Anti-Friction Effect of Ball-Milled and Subsequently Annealed Expanded Graphite/Iron Powder Mixture

Abstract:

A mixture of expanded graphite (EG) and iron powders was ball-milled in a high-energy mill under an air atmosphere and subsequently annealed under a vacuum atmosphere. The products were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), and their anti-friction effect used as lubricating additive was investigated by using a tribo-tester. On the surface of the products, graphite encapsulated iron nanoparticles with a size range of 50-150 nm were formed. Compared with only milled EG/Fe powders, the products exhibit a higher crystallinity of graphite and iron. The products have a marked anti-friction effect, and this effect is better than that of the only milled EG/Fe powders.

• Periodical: Applied Mechanics and Materials (Volumes 182-183)
• Pages: 319-322
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.182-183.319
• Online since: June 2012
• Authors: Yu Shan Li
• Keywords: Annealing, Ball-milling, Expanded Graphite, Iron

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