| dc.contributor.author | Mandal, Hasan | |
| dc.date.accessioned | 2019-10-20T07:59:53Z | |
| dc.date.available | 2019-10-20T07:59:53Z | |
| dc.date.issued | 1999 | |
| dc.identifier.issn | 0955-2219 | |
| dc.identifier.uri | https://hdl.handle.net/11421/15807 | |
| dc.description.abstract | Two different ?-sialon compositions have been densified by either pressureless sintering or capsul-free sinter HIPing using either single cation namely strontium, lanthanum, cerium, neodymium or their equimolar mixtures with calcium/ytterbium as a principal cation. The resulting materials have been heat-treated at 1450°C for a maximum of 720 h to observe the ?›ß sialon transformation. Effect of starting compositions on the phase stabilities, microstructure, room temperature mechanical properties and optical transparent nature of sintered materials have been investigated. SEM observations for oxygen rich starting compositions revealed that ?-sialon grains exist in needle like morphology in all the systems studied after both pressureless sintering and HIPing. Suprisingly, the nitrogen rich starting compositions give rise to coloured, optically transparent ?-sialon ceramics after capsul-free HIPing. Clear evidence of ?-sialon formation with incorporation of large cations namely, La3+, Ce3+, Nd3+ and Sr2+, has been established by XRD, SEM and EDX analysis. The observed phenomenon could possibly extend the usefulness of ?-sialons ceramics to both structural and functional applications | en_US |
| dc.description.sponsorship | It is a pleasure to thank Professor M. J. Hoffmann, Dr. R. Oberacker and Dr. P. D. Ramesh at Karlsruhe University, Professors K. H. Jack and Derek P. Thompson at Newcastle University, Dr. Y.-B. Cheng at Monash University, Dr. Z. J. Shen at Stockholm University, Dr. N. Camuscu at Kirikkale University who have contributed to some aspects of this work. I would also like to acknowledge financial assistance from the Alexander von Humbolt Foundation (AvH, Germany) during the course of this work. | en_US |
| dc.language.iso | eng | en_US |
| dc.rights | info:eu-repo/semantics/closedAccess | en_US |
| dc.subject | Hot Isostatic Pressing | en_US |
| dc.subject | Mechanical Properties | en_US |
| dc.subject | Microstructure-Final | en_US |
| dc.subject | Optical Properties | en_US |
| dc.subject | Sialon | en_US |
| dc.subject | Sintering | en_US |
| dc.title | New developments in ? -SiAlON ceramics | en_US |
| dc.type | article | en_US |
| dc.relation.journal | Journal of the European Ceramic Society | en_US |
| dc.contributor.department | Anadolu Üniversitesi, Fen Bilimleri Enstitüsü, Seramik Mühendisliği Anabilim Dalı | en_US |
| dc.identifier.volume | 19 | en_US |
| dc.identifier.issue | 13-14 | en_US |
| dc.identifier.startpage | 2349 | en_US |
| dc.identifier.endpage | 2357 | en_US |
| dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |
| dc.contributor.institutionauthor | Mandal, Hasan | |
