Grain growth in alumina-silica fibers

Citation
Gg. Tibbetts et al., Grain growth in alumina-silica fibers, J MATER SCI, 34(5), 1999, pp. 1017-1023
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS SCIENCE
ISSN journal
00222461 → ACNP
Volume
34
Issue
5
Year of publication
1999
Pages
1017 - 1023
Database
ISI
SICI code
0022-2461(19990301)34:5<1017:GGIAF>2.0.ZU;2-W
Abstract
Alumina-silica fibers, produced by air blowing a melt of 47 wt % alumina an d 53 wt % silica, are initially amorphous, but may be heat treated to conve rt them into mullite and increase crystallite size. On heating to near 1000 degrees C, an exothermic phase transition abruptly produces mullite X-ray peaks. Further 1 hour heat treatments gradually sharpen these peaks until a minimum peak width is reached near 1600 degrees C. Scherrer calculations o f crystallite size show that the mullite crystallites formed near 1000 degr ees C are about 13 nm in diameter; these regions grow to about 100 nm after 1 hour at 1600 degrees C. (C) 1999 Kluwer Academic Publishers.