Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 37, Issue 14, Pages 4371-4377Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2017.04.064
Keywords
Refractory carbides; Tribology; Nanoindentation; Fractography
Categories
Funding
- MVTS 7RP ERA.NET-GRACE
- NanoCEXmat II [ITMS 26220120035]
- FNP [POWROTY/2016-1/3]
- [APVV-15-0469]
- [APVV-0108-12]
- [VEGA 2/0163/16]
- [VEGA 2/0189/15]
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Deformation, damage and wear characteristics of spark plasma sintered VC, NbC and ZrC refractory carbides have been investigated using nanoindentation, tribology and micro/macro - indentation tests. Fractography, using SEM, AFM and confocal microscopy, was used for the characterization of deformation and damage mechanisms. Considerable indentation load - size effect was found in all systems with hardness values from 30 to 36 GPa to 13-17 GPa corresponding to the applied loads of 1 mN and 100 N, respectively. During nanoindentation, characteristic stress-drops were observed on hardness displacement profiles of NbC and ZrC at depth region of 15-30 nm while this was not typical in VC. The highest coefficient of friction was measured for NbC with a value of 0.45 and the lowest for ZrC with an average value of 0.3. The wear rate of the NbC, and VC was similar, approximately 3 x 10(-6) mm(3)/Nm only the wear rate of ZrC was larger, approximately 2 x 10(-5) mm(3)/Nm. (C) 2017 Elsevier Ltd. All rights reserved.
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