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

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

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Received: 27 October 2009; in revised form: 30 November 2009 / Accepted: 3 December 2009 / Published: 29 December 2009
(This article belongs to the Special Issue Composite Materials)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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
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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.

AMA Style

Levashov E, Kurbatkina V, Alexandr Z. Improved Mechanical and Tribological Properties of Metal-Matrix Composites Dispersion-Strengthened by Nanoparticles. Materials. 2010; 3(1):97-109.

Chicago/Turabian Style

Levashov, Evgenii; Kurbatkina, Victoria; Alexandr, Zaytsev. 2010. "Improved Mechanical and Tribological Properties of Metal-Matrix Composites Dispersion-Strengthened by Nanoparticles." Materials 3, no. 1: 97-109.

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