Spark Plasma sintering of X-Sialon
2007 (English)In: Journal of the Australian Ceramic Society, Vol. 43, no 2, 138-142 p.Article in journal (Refereed) Published
The mech. properties of X-sialon (generally accepted formula: Si12Al18O39N8) are not well characterized. In an investigation of this material, X-sialon powders with 0 and 1.5 wt% Y2O3 were sintered using spark plasma sintering (SPS), and the phys. and mech. properties of the sintered X-sialon were detd. SPS allows rapid and low-temp. sintering by applying a pulsed DC current through the sample. Dense X-sialon bodies (3.04 g cm-3) with unique microstructures and exceptional strengths (up to 719 MPa using the ball on ring method) were obtained by sintering at set temps. of 1300 to 1460C (estd. real temps. of 1360 to 1600C) for 0 to 5 min under an applied uniaxial pressure of 50 MPa. Vickers hardness (12.8 - 12.8 GPa) and toughness (1.8 - 2.0 MPa m1/2) measurements are in line with previously reported values.
Place, publisher, year, edition, pages
2007. Vol. 43, no 2, 138-142 p.
IdentifiersURN: urn:nbn:se:su:diva-15126OAI: oai:DiVA.org:su-15126DiVA: diva2:181646