| About this Abstract |
| Meeting |
Materials Science & Technology 2011
|
| Symposium
|
MS&T'11 Poster Session
|
| Presentation Title |
153 Comparative Study of the Deposition of NiCoCrAl Alloys Used as Bond Coat Deposited by HVOF and Air Plasma Spray Processes |
| Author(s) |
Lucas Alan de Aguiar, Gustavo Bavaresco Sucharski, Émillyn ferreira Trevisani, André Chicoski, André Ricardo Capra, Ramón Sigifredo Cortés Paredes |
| On-Site Speaker (Planned) |
|
| Abstract Scope |
TBC are often used to achieve an increase in the work temperature of compounds exposed to aggressive service conditions at high temperatures. It’s constituted of a ceramic coating resistant to thermal shocks ad a Bond Coat(BC), responsible for the corrosion and oxidation resistance at high temperatures. In order to qualify and optimize the TBCs deposited by Thermal Spray it was deposited YSZ ceramic alloys by Air Plasma Spray, and as bond coat was deposited the NiCoCrAl superalloy by the HVOF and APS processes. Tests were performed of microhardness, adhesion for tensile test, hot wear and oxidation resistance. The samples were evaluated by their porosity, micro and macrostructure and chemical composition. The BC deposited by HVOF present low porosity and oxides, high oxidation resistance and adherence while the coatings deposited by APS show a higher porosity without affecting their adherence, which may suggest a higher thermal isolation. |
| Proceedings Inclusion? |
Undecided |