High/room temperature mechanical properties of 3Y-TZP/CNTs composites
2014 (English)In: Ceramics International, ISSN 0272-8842, E-ISSN 1873-3956, Vol. 40, no 2, 3347-3352 p.Article in journal (Refereed) Published
Spark Plasma Sintering (SPS) method was practiced, in the current investigation, to obtain fully dense materials with an excellent dispersion of MWCNTs (Multi-walled Carbon Nanotubes) within the matrix. Scanning and transmission electron microscopy micrographs as well as Raman Spectroscopy revealed no conspicuous signs of damages on the nanotubes' structure, as a result of applying appropriate processing measures. Measurements of mechanical properties' revealed the value of 15.2 +/- 0.4 MPa m(1/2) for indentation fracture toughness, impling our success to align transformation toughening (while the zirconia has the grain size around 1 mu m) with the effects of MWCNTs addition (5 wt%). High temperature mechanical properties of the composites have been investigated using Mechanical Spectroscopy (MS) up to 1600 K at frequency equal to 1 Hz. The MS results proved that CNTs could hinder grain-boundary sliding and subsequently lead to an enhanced creep resitance at high temperatures.
Place, publisher, year, edition, pages
2014. Vol. 40, no 2, 3347-3352 p.
Creep, Zirconia, Carbon nanotubes, Ceramic matrix composites, Toughness
IdentifiersURN: urn:nbn:se:su:diva-100844DOI: 10.1016/j.ceramint.2013.09.098ISI: 000329882100101OAI: oai:DiVA.org:su-100844DiVA: diva2:698365