Abstract
A comparative study on microstructure, composition variation and phase distribution in an Ir-aluminide and an aluminized Ni-base single crystal superalloy, TMS-75 subjected to cyclic oxidation test at 1373 K is reported. The weight change as a function of number of oxidation cycles has demonstrated an improved oxidation resistance for iridium aluminide. While aluminized TMS-75 has an enrichment of aluminium to approximately 50 at.%, an addition of iridium increases the average aluminium concentration of the surface to approximately 70 at.% in the as aluminized condition. Unlike the aluminized TMS-75, the cyclic oxidized Ir aluminide reveals a precipitate free surface layer, followed by a significantly reduced precipitation of γ′-Ni3Al and TCP phases in the diffusion zone.
| Original language | English |
|---|---|
| Pages (from-to) | 377-388 |
| Number of pages | 12 |
| Journal | Surface and Coatings Technology |
| Volume | 186 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2004 Sep 1 |
| Externally published | Yes |
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Keywords
- Diffusion
- Iridium
- Ni-base superalloy
- Oxidation
- Sputtering
ASJC Scopus subject areas
- Surfaces, Coatings and Films
- Condensed Matter Physics
- Surfaces and Interfaces
Cite this
A comparative study of cyclic oxidized Ir aluminide and aluminized nickel base single crystal superalloy. / Kuppusami, P.; Murakami, Hideyuki.
In: Surface and Coatings Technology, Vol. 186, No. 3, 01.09.2004, p. 377-388.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A comparative study of cyclic oxidized Ir aluminide and aluminized nickel base single crystal superalloy
AU - Kuppusami, P.
AU - Murakami, Hideyuki
PY - 2004/9/1
Y1 - 2004/9/1
N2 - A comparative study on microstructure, composition variation and phase distribution in an Ir-aluminide and an aluminized Ni-base single crystal superalloy, TMS-75 subjected to cyclic oxidation test at 1373 K is reported. The weight change as a function of number of oxidation cycles has demonstrated an improved oxidation resistance for iridium aluminide. While aluminized TMS-75 has an enrichment of aluminium to approximately 50 at.%, an addition of iridium increases the average aluminium concentration of the surface to approximately 70 at.% in the as aluminized condition. Unlike the aluminized TMS-75, the cyclic oxidized Ir aluminide reveals a precipitate free surface layer, followed by a significantly reduced precipitation of γ′-Ni3Al and TCP phases in the diffusion zone.
AB - A comparative study on microstructure, composition variation and phase distribution in an Ir-aluminide and an aluminized Ni-base single crystal superalloy, TMS-75 subjected to cyclic oxidation test at 1373 K is reported. The weight change as a function of number of oxidation cycles has demonstrated an improved oxidation resistance for iridium aluminide. While aluminized TMS-75 has an enrichment of aluminium to approximately 50 at.%, an addition of iridium increases the average aluminium concentration of the surface to approximately 70 at.% in the as aluminized condition. Unlike the aluminized TMS-75, the cyclic oxidized Ir aluminide reveals a precipitate free surface layer, followed by a significantly reduced precipitation of γ′-Ni3Al and TCP phases in the diffusion zone.
KW - Diffusion
KW - Iridium
KW - Ni-base superalloy
KW - Oxidation
KW - Sputtering
UR - http://www.scopus.com/inward/record.url?scp=3543117309&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=3543117309&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2003.12.016
DO - 10.1016/j.surfcoat.2003.12.016
M3 - Article
AN - SCOPUS:3543117309
VL - 186
SP - 377
EP - 388
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
SN - 0257-8972
IS - 3
ER -