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New generation of plasma-sprayed mullite coatings on silicon carbide
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lee, Kang N. Miller, Robert A. Jacobson, Nathan S. |
| Copyright Year | 1995 |
| Description | 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. |
| File Size | 19057386 |
| Page Count | 7 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19960010009 |
| Archival Resource Key | ark:/13960/t4tj3ff9j |
| Language | English |
| Publisher Date | 1995-03-01 |
| Access Restriction | Open |
| Subject Keyword | Nonmetallic Materials Sprayed Coatings Mullites Silicon Carbides Thermal Cycling Tests Amorphous Materials Ceramics Hot Corrosion Corrosion Resistance Thermal Expansion Cracks Heating Plasma Spraying Microstructure Protective Coatings Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
