Lubricated sliding wear behaviour of Al 2 O 3 –13TiO 2 coatings

• Published in: Surface engineering Vol. 29; no. 6; pp. 447 - 454
• Main Authors: Deshpande, P. V., Vadiraj, A., Manivasagam, G., Bhagat, P. R., Muskawar, P. N., Sreenivasan, V. S., Anil, P. M.
• Format: Journal Article
• Language: English
• Published: 01.07.2013
• ISSN: 0267-0844; 1743-2944
• DOI: 10.1179/1743294413Y.0000000135

The influence of Cu and Ni nanoparticle suspensions (2 wt-%) in commercially available engine oil (15W40) has been investigated on friction and wear behaviour of Al 2 O 3 –13TiO 2 coatings. Lab synthesised nano-Cu and Ni suspensions have been compared with one commercially available nano-Cu suspension. Results show that lab synthesised Cu and Ni increases the oil viscosity by 12 and 20% for Ni and Cu respectively. However, the commercially available nano-Cu has reduced the viscosity by 8%. Lab synthesised Cu and Ni showed slightly reduced friction coefficient with significantly higher mass loss compared to virgin base oil and commercially available nano-Cu. The abrasive nature of these particles may possibly predominate in higher viscosity medium generating steady wear particles from the softer counterpart. Commercially available nano-Cu shows higher and irregular friction profile with mass loss equal to base oil possibly due to reduced viscosity.