EFFECT OF A SMALL CONCENTRATION OF IRON IMPURITY ON THE OXIDATION BEHAVIOR OF POROUS SIC

Authors
NANRI H SHIRAI M TAKEUCHI N ISHIDA S WATANABE K WAKAMATSU M
Citation
H. Nanri et al., EFFECT OF A SMALL CONCENTRATION OF IRON IMPURITY ON THE OXIDATION BEHAVIOR OF POROUS SIC, Nippon Seramikkusu Kyokai gakujutsu ronbunshi, 105(6), 1997, pp. 500-503
Citations number
17
Categorie Soggetti
Material Science, Ceramics
Journal title
Nippon Seramikkusu Kyokai gakujutsu ronbunshi → ACNP
ISSN journal
09145400
Volume
105
Issue
6
Year of publication
1997
Pages
500 - 503
Database
ISI
SICI code
0914-5400(1997)105:6<500:EOASCO>2.0.ZU;2-3
Abstract
Oxidation behavior of porous SiC containing Fe was investigated using a quadrupole mass spectrometer by measuring the volume of evolved gase s during oxidation at 1700 K. This Fe-containing SiC was obtained by i mmersing the Sic in an acetone solution with an Fe(C5H7O2)(3) concentr ation of 0.1 M for 1-5 min followed by calcination at 1173 K. The weig ht gain and the total amount of gases evolved decreased with increasin g Fe2O3 content. XRD intensity ratio of cristobalite to SiC was increa sed with increasing Fe2O3 content. These results indicate that the acc elerated crystallization of amorphous silica to cristobalite and the r etardation of the oxidation were caused by the added Fe.