Nano Surfaces & Interfaces Chapter 3

Nano-diamond Coatings on Aluminum 319 for Improved Tribological Properties

Authors: R. Blum, D. Kalyanasundaram, R. Nair, P. Molian

Affilation: Iowa State University, United States

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.

ISBN: 978-1-4200-8503-7
Pages: 1,118
Hardcopy: $159.95