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Metals 2017, 7(4), 123; doi:10.3390/met7040123

Structural Investigations of TiC–Cu Nanocomposites Prepared by Ball Milling and Spark Plasma Sintering

1
School of Materials Science and Engineering, Hanoi University of Science and Technology, No 1 Dai Co Viet, Hanoi 100000, Vietnam
2
School of Materials Science and Engineering, University of Ulsan, San-29, Mugeo-2 Dong, Nam-Gu, Ulsan 680-749, Korea
3
Lavrentyev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences, Lavrentyev Ave. 15, Novosibirsk 630090, Russia
4
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Kutateladze str. 18, Novosibirsk 630128, Russia
*
Author to whom correspondence should be addressed.
Academic Editors: Mieczyslaw Jurczyk and Manoj Gupta
Received: 17 January 2017 / Revised: 10 March 2017 / Accepted: 31 March 2017 / Published: 3 April 2017
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Abstract

In this work, TiC–Cu composites containing 20 and 30 vol % of nano-sized titanium carbide (TiC) particles were prepared by powder metallurgy using copper powders with micrometer-sized and nanometer-sized particles. Mixtures of TiC and Cu powders were ball milled for 10 h and spark plasma sintered at 800–900 °C under an applied pressure of 50 MPa. The relative density of the sintered composites was 95.0%–96.5%. The composites fractured in a ductile mode. The crystallite size of the copper matrix in the composites prepared using the nanometer-sized copper powder was smaller than that in composites prepared using the micrometer-sized copper powder, which was confirmed by transmission electron microscopy (TEM). The hardness of the composites increased as the sintering temperature was increased from 800 to 900 °C. When the TiC content increased from 20 to 30 vol %, the hardness of the composites obtained from the micrometer-sized copper powder and sintered at 900 °C increased from 284 to 315 HV, while in composites obtained from the nanometer-sized copper, the hardness decreased from 347 to 337 HV. View Full-Text
Keywords: spark plasma sintering; titanium carbide; copper; ball milling; hardness spark plasma sintering; titanium carbide; copper; ball milling; hardness
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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. (CC BY 4.0).

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MDPI and ACS Style

Nguyen Thi Hoang, O.; Nguyen Hoang, V.; Kim, J.-S.; Dudina, D.V. Structural Investigations of TiC–Cu Nanocomposites Prepared by Ball Milling and Spark Plasma Sintering. Metals 2017, 7, 123.

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