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Metals 2018, 8(1), 50; https://doi.org/10.3390/met8010050

Mechanical and Tribological Properties of Al2O3-TiC Composite Fabricated by Spark Plasma Sintering Process with Metallic (Ni, Nb) Binders

1
Academy of Scientific and Innovative Research (AcSIR), New Delhi 110020, India
2
CSIR-Institute of Minerals and Materials Technology (IMMT), Bhubaneswar 751013, India
3
Department of Materials Physics, Montanuniversitat Leoben, Jahnstraße 12, 8700 Leoben, Austria
4
Department of Manufacturing and Civil Engineering, Norwegian University of Science and Technology, Teknologivegen 22, 2815 Gjøvik, Norway
5
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, A-8700 Leoben, Austria
*
Authors to whom correspondence should be addressed.
Received: 21 December 2017 / Revised: 6 January 2018 / Accepted: 10 January 2018 / Published: 12 January 2018
(This article belongs to the Special Issue Cermets and Hardmetals)
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Abstract

Al2O3-10TiC composites were fabricated through the powder metallurgical process (mechanical milling combined with spark plasma sintering) with the addition of Ni/Nb as metallic binders. The effect of binder addition (Ni/Nb) on the processing, microstructure, and mechanical and tribological properties of the bulk-sintered composite samples was investigated. The microstructure of the composite reveals a homogeneous distribution of the TiC particles in the Al2O3 matrix. However, the presence of Ni/Nb was not traceable, owing to the small amounts of Ni/Nb addition. Hardness and density of the composite samples increase with the increasing addition of Nb (up to 2 wt. % Nb). Any further increase in the Nb content (3 wt. %) decreases both the hardness and the wear resistance. However, in case of Ni as binder, both the hardness and wear resistance increases with the increase in the Ni content from 1 wt. % to 3 wt. %. However, the composite samples with Nb as binder show improved hardness and wear resistance compared to the composites with Ni as binder. View Full-Text
Keywords: mechanical properties; spark plasma sintering; microstructure; composites; abrasion test mechanical properties; spark plasma sintering; microstructure; composites; abrasion test
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Kumar, R.; Chaubey, A.K.; Maity, T.; Prashanth, K.G. Mechanical and Tribological Properties of Al2O3-TiC Composite Fabricated by Spark Plasma Sintering Process with Metallic (Ni, Nb) Binders. Metals 2018, 8, 50.

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