In:
Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 336-338 ( 2007-4), p. 1750-1752
Abstract:
The cyclic oxidation of thermal barrier coating (TBC) specimens consisting of nickel-base
superalloy, low pressure plasma sprayed Ni-24Cr-6Al-0.7Y (wt.%) bond coatings and air plasma sprayed 7.5 wt.% yttria stabilized zirconia top coatings was studied at 1050°C in air, (air + 5%H2O), O2 and (O2 +
5%H2O) respectively. The oxidation kinetics of the TBC in each test environment accords with parabolic law at the initial stage and obeys almost liner law at the final stage. The cyclic oxidation life of the TBC is
500h (1h/cyc) in O2 and (O2 + 5%H2O) and 900 h in air and (air + 5%H2O). The SEM observations indicated the oxide formed along the bond coat and top coat interface after failure at 1050°C in different
environments are all consisted of Al2O3, Ni(Al,Cr)2O4, NiO and Cr2O3.
Type of Medium:
Online Resource
ISSN:
1662-9795
DOI:
10.4028/www.scientific.net/KEM.336-338
DOI:
10.4028/www.scientific.net/KEM.336-338.1750
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2007
detail.hit.zdb_id:
2073306-9