Rapid formation and deformation of Li-doped sialon ceramics
2004 (English)In: Journal of The American Ceramic Society, ISSN 0002-7820, E-ISSN 1551-2916, Vol. 87, no 4, 727-729 p.Article in journal (Refereed) Published
Two lithium-doped sialon ceramics were densified and superplastically deformed by spark plasma sintering (SPS). Rapid densification with linear shrinkage rates of approximately 5 × 10−3 s−1 were observed for samples heated at a rate of 100°C/min up to ∼1400°C under a uniaxial pressure of 40 MPa. Isothermal deformation by SPS-preprepared, fully densified ceramics performed at T≥ 1450°C yielded strain rates in the order of 10−2 s−2. It is suggested that a high heating rate promotes material transport via formation of a nonequilibrated oxygen-rich liquid of low viscosity. This finding most likely holds true for other liquid-phase sintered ceramics as well and has implications for cost-effective manufacturing of ceramic components.
Place, publisher, year, edition, pages
2004. Vol. 87, no 4, 727-729 p.
sialon, lithium, densification
IdentifiersURN: urn:nbn:se:su:diva-22952DOI: 10.1111/j.1551-2916.2004.00727.xOAI: oai:DiVA.org:su-22952DiVA: diva2:189797