New generation of plasma-sprayed mullite coatings on silicon carbide
Technical Report
·
OSTI ID:188662
Mullite is promising as a protective coating for silicon-based ceramics in aggressive high-temperature environments. Conventionally plasma-sprayed mullite on SiC tends to crack and debond on thermal cycling. It is shown that this behavior is due to the presence of amorphous mullite in the conventionally sprayed mullite. Heating the SiC substrate during the plasma spraying eliminated the amorphous phase and produced coatings with dramatically improved properties. The new coating exhibits excellent adherence and crack resistance under thermal cycling between room temperature and 1000 to 1400 C. Preliminary tests showed good resistance to Na2CO3-induced hot corrosion.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center
- OSTI ID:
- 188662
- Report Number(s):
- N--96-17175; NASA-TM--111195; NAS--1.15:111195; NIPS--96-07168
- Country of Publication:
- United States
- Language:
- English
Similar Records
New generation of plasma-sprayed mullite coatings on silicon carbide
Evaluation of ceramic coatings on silicon carbide
Oxidation behavior of mullite-coated SiC and SiC/SiC composites under thermal cycling between room temperature and 1200--1400 C
Journal Article
·
Tue Feb 28 23:00:00 EST 1995
· Journal of the American Ceramic Society
·
OSTI ID:79784
Evaluation of ceramic coatings on silicon carbide
Conference
·
Sat Dec 31 23:00:00 EST 1988
·
OSTI ID:6114273
Oxidation behavior of mullite-coated SiC and SiC/SiC composites under thermal cycling between room temperature and 1200--1400 C
Journal Article
·
Thu Feb 29 23:00:00 EST 1996
· Journal of the American Ceramic Society
·
OSTI ID:230733