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Materials 2010, 3(1), 97-109; doi:10.3390/ma3010097

Improved Mechanical and Tribological Properties of Metal-Matrix Composites Dispersion-Strengthened by Nanoparticles

Moscow Institute of Steel and Alloys, Leninskii pr. 4, Moscow, 119049, Russia
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Received: 27 October 2009 / Revised: 30 November 2009 / Accepted: 3 December 2009 / Published: 29 December 2009
(This article belongs to the Special Issue Composite Materials)
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Abstract

Co- and Fe-based alloys produced by powder technology are being widely used as a matrix for diamond-containing composites in cutting, drilling, grinding pplications, etc. The severe service conditions demand that the mechanical and tribological properties of these alloys be improved. Development of metal-matrix composites (MMCs) and alloys reinforced with nanoparticles is a promising way to resolve this problem. In this work, we have investigated the effect of nano-sized WC, ZrO2, Al2O3, and Si3N4 additives on the properties of sintered dispersion-strengthened Co- and Fe-based MMCs. The results show an increase in the hardness (up to 10 HRB), bending strength (up to 50%), wear resistance (by a factor of 2–10) and a decrease in the friction coefficient (up to 4-fold) of the dispersion-strengthened materials. The use of designed alloys as a binder of cutting diamond tools gave a 4-fold increment in the service life, without reduction in their cutting speed.
Keywords: metal-matrix composites; nanoparticles; dispersion strengthening; diamond tools metal-matrix composites; nanoparticles; dispersion strengthening; diamond tools
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Levashov, E.; Kurbatkina, V.; Alexandr, Z. Improved Mechanical and Tribological Properties of Metal-Matrix Composites Dispersion-Strengthened by Nanoparticles. Materials 2010, 3, 97-109.

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