Material removal mechanisms by EDM of zirconia reinforced MWCNT nanocomposites
2016 (English)In: Ceramics International, ISSN 0272-8842, E-ISSN 1873-3956, Vol. 42, no 5, p. 5792-5801Article in journal (Refereed) Published
Abstract [en]
Several composites of tetragonal zirconia polycrystals doped with 3 mol% yttria (3Y-TZP) and multiwalled carbon nanotubes (MWCNT) with concentrations from 0.5 to 4 wt% CNT were processed, spark plasma sintered, and characterised for a wide range of mechanical, electrical and thermal properties. In particular, a strong increase in electrical conductivity at room temperature was found with only 0.5 wt% CNT. However, the thermal conductivity was decreasing with increasing CNT content. Electrical discharge machining (EDM) using die sinking was carried out using the composites of 1 and 2 wt% CNT as workpieces. It was shown that both compositions could be successfully machined by EDM. The surface integrity and the subsurface were studied by SEM/FIB in order to determine the material removal mechanisms, which were found to be associated to spalling and melting/evaporation. Raman Spectroscopy was used to evaluate the damage of CNTs after EDM.
Place, publisher, year, edition, pages
2016. Vol. 42, no 5, p. 5792-5801
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-15989DOI: 10.1016/j.ceramint.2015.12.120ISI: 000370884500027Scopus ID: 2-s2.0-84954305605Local ID: f932c19c-04cc-4fe6-bef7-1d159ba82e45OAI: oai:DiVA.org:ltu-15989DiVA, id: diva2:988965
Note
Validerad; 2016; Nivå 2; 20160107 (andbra)
2016-09-292016-09-292023-09-05Bibliographically approved