KINETICS OF ISOTHERMAL PHASE-TRANSFORMATIONS IN A DENTAL PORCELAIN

Authors
BARREIRO MM VICENTE EE
Citation
Mm. Barreiro et Ee. Vicente, KINETICS OF ISOTHERMAL PHASE-TRANSFORMATIONS IN A DENTAL PORCELAIN, Journal of materials science. Materials in medicine, 4(4), 1993, pp. 431-436
Citations number
40
Categorie Soggetti
Material Science","Polymer Sciences","Medicine Miscellaneus
Journal title
Journal of materials science. Materials in medicine → ACNP
ISSN journal
09574530
Volume
4
Issue
4
Year of publication
1993
Pages
431 - 436
Database
ISI
SICI code
0957-4530(1993)4:4<431:KOIPIA>2.0.ZU;2-D
Abstract
The dissolution of leucite (KAlSi2O8) and the precipitation of sanidin e (NaxK1-xAlSi3O8; 0.1 < x < 0.3), occurring during isothermal heat tr eatments of a dental porcelain for porcelain-fused-to-metal restoratio ns, was studied. The identification of phases was performed by X-ray d iffraction, optical and scanning electron microscopy. An isothermal ti me-temperature-transformation (TTT) diagram, from 800 to 1000-degrees- C, and for periods up to 1440 min, is proposed. No metastable cubic le ucite was retained by air-quenching in any sample. No increase of leuc ite volume fraction was observed.