Low-temperature spark plasma sintering of NiO nanoparticles
2011 (English)In: Materials Science & Engineering: A, ISSN 0921-5093, Vol. 528, no 6, 2936-2940 p.Article in journal (Refereed) Published
NiO nanoparticles of 20 nm in diameter were spark plasma sintered between 400 °C and 600 °C for 5 and 10 min durations. Application of 100 MPa pressure from room temperature resulted in densities between 75% and 92%. The final grain size was between 26 nm and 68 nm. Lower densities were recorded when 100 MPa was applied at the SPS temperature. Two shrinkage rate maxima of 3.4 × 10−3 s−1 and 2 × 10−3 s−1 were observed around 390 ± 10 °C and at the SPS temperature. The two shrinkage rate maxima were related to densification by particle sliding followed by diffusional grain boundary sliding during the heating. The strong effects of the surface and interfacial processes which are active during the SPS were highlighted.
Place, publisher, year, edition, pages
2011. Vol. 528, no 6, 2936-2940 p.
IdentifiersURN: urn:nbn:se:su:diva-53046DOI: 10.1016/j.msea.2010.11.050ISI: 000287643200094OAI: oai:DiVA.org:su-53046DiVA: diva2:389681