Nano Science and Technology Institute
Nanotech 2008 Vol. 1
Nanotech 2008 Vol. 1
Nanotechnology 2008: Materials, Fabrication, Particles, and Characterization - Technical Proceedings of the 2008 NSTI Nanotechnology Conference and Trade Show, Volume 1
Chapter 3: Nano Surfaces & Interfaces

Nano-diamond Coatings on Aluminum 319 for Improved Tribological Properties

Authors:R. Blum, D. Kalyanasundaram, R. Nair, P. Molian
Affilation:Iowa State University, US
Pages:470 - 474
Keywords:nanocoatings, diamoond, tribology, aluminum, laser sintering
Abstract:Laser-induced phase transition and sintering of nano-diamond powders (4-8nm) was used to produce a thick (10-50um) strongly adherent nano-diamond/diamond-like carbon (nD-DLC) coatings on aluminum alloy 319. A transition to diamond-like carbon produced a Vickers hardness of 2250 kg/mm^2, and a transition to complete nano-diamond produced a Vickers hardness of 9000 kg/mm^2. Nano-diamond powders produced by detonation synthesis were electrostatically sprayed on the aluminum substrate coupons followed by a continuous CO2 laser heating in a controlled fashion; this causes a liquid-phase nano-sintering which yielded a strongly adherent coating. The application of the project will lead to coatings for light-weight engine components to improve their wear resistance.
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