In:
Journal of the American Ceramic Society, Wiley, Vol. 102, No. 10 ( 2019-10), p. 5725-5737
Kurzfassung:
Y 2 Si 2 O 7 coatings were formed on Hi‐Nicalon‐S SiC fibers by reaction of solution‐derived YPO 4 coatings with glass SiO 2 scales formed by fiber oxidation. Two oxidation methods were used: pre‐oxidation, where fibers were oxidized prior to YPO 4 coating, or post‐oxidation, where fibers were first coated with YPO 4 and then oxidized. Fibers with YPO 4 /SiO 2 films were heat‐treated in argon at 1200°C for 20 hours to react YPO 4 and SiO 2 to Y 2 Si 2 O 7 . The effects of SiO 2 to YPO 4 film thicknesses on fiber strength and on the Y 2 Si 2 O 7 formation kinetics were investigated. An optimized process to obtain single‐phase continuous Y 2 Si 2 O 7 coatings on Hi‐Nicalon‐S fibers with low loss in fiber strength is suggested.
Materialart:
Online-Ressource
ISSN:
0002-7820
,
1551-2916
DOI:
10.1111/jace.2019.102.issue-10
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2019
ZDB Id:
2008170-4
ZDB Id:
219232-9
