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Coefficient of friction and wear resistance of zirconia-MWCNTs composites
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Department of Materials Science and Engineering, Universitat Politècnica de Catalunya, Barcelona.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-3661-9262
Department of Materials Science and Engineering, Universitat Politècnica de Catalunya, Barcelona.
2015 (English)In: Ceramics International, ISSN 0272-8842, E-ISSN 1873-3956, Vol. 41, no 1 Part A, p. 459-468Article in journal (Refereed) Published
Abstract [en]

Composites of 3 mol.% yttria-doped tetragonal zirconia (3Y-TZP) reinforced with multiwalled carbon nanotubes (MWCNT) up to 2 wt. % content have been produced using spark plasma sintering (SPS). The theoretical densities of the studied composites were found to be between 99.4 and 97.4%. The addition of MWCNT content resulted in reduction of 3Y-TZP grain size from 174 to 148 nm. The effect of MWCNT on the friction coefficient (COF) was studied by performing nano- and macro-scratches using diamond Berkovich and Rockwell indenters, respectively. Moreover, the COF and the wear rate were also investigated in reciprocating sliding against a zirconia ball under a load of 5 N. The results showed that the COF decreased upon the increase in MWCNT content. However, in macro-scratch testing, there was a critical load over which brittle fracture sets in and its value decreases as the MWCNT content increases. The wear resistance was found to be decreasing very slightly for less than 1 wt. % MWCNT, while it increases strongly for the addition of 2 wt. % MWCNT under the conditions studied. The results were discussed in terms of material properties, scanning electron microscopy observations of the wear track and nanoindentation tests.

Place, publisher, year, edition, pages
2015. Vol. 41, no 1 Part A, p. 459-468
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-2685DOI: 10.1016/j.ceramint.2014.08.092ISI: 000346216300055Scopus ID: 2-s2.0-84922781919Local ID: 056a777f-6110-4ed5-b8a5-4a9f1d59ef79OAI: oai:DiVA.org:ltu-2685DiVA, id: diva2:975538
Note
Validerad; 2014; Nivå 2; 20140910 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Melk, LatifaAntti, Marta-Lena

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