TY - JOUR
T1 - Martensitic transformation in CVD NiAl and (Ni,Pt)Al bond coatings
AU - Zhang, Y.
AU - Haynes, J. A.
AU - Pint, B. A.
AU - Wright, I. G.
AU - Lee, W. Y.
PY - 2003/1/30
Y1 - 2003/1/30
N2 - The martensitic phase transformation in single-phase β-NiAl and (Ni,Pt) Al coatings was investigated. After isothermal exposure to 1150 °C for 100 h, the β phase in both types of coatings was transformed to a martensite phase during cooling to room temperature. Martensitic transformation was also observed in the (Ni,Pt)Al bond coat with and without a YSZ top layer after thermal cycling at 1150 °C (700 1-h cycles). The transformation took place due to Al depletion in the coating from the formation of the Al O scale and interdiffusion between the coating and superalloy substrate. The effects of the martensitic transformation 2 3 on coating surface stability ('rumpling') via volume changes during the phase transformation are discussed with regard to TBC failure.
AB - The martensitic phase transformation in single-phase β-NiAl and (Ni,Pt) Al coatings was investigated. After isothermal exposure to 1150 °C for 100 h, the β phase in both types of coatings was transformed to a martensite phase during cooling to room temperature. Martensitic transformation was also observed in the (Ni,Pt)Al bond coat with and without a YSZ top layer after thermal cycling at 1150 °C (700 1-h cycles). The transformation took place due to Al depletion in the coating from the formation of the Al O scale and interdiffusion between the coating and superalloy substrate. The effects of the martensitic transformation 2 3 on coating surface stability ('rumpling') via volume changes during the phase transformation are discussed with regard to TBC failure.
KW - Bond coat
KW - Martensitic transformation
KW - Platinum aluminide
KW - Rumpling
KW - Thermal barrier coating
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U2 - 10.1016/S0257-8972(02)00585-6
DO - 10.1016/S0257-8972(02)00585-6
M3 - Article
AN - SCOPUS:0037472686
SN - 0257-8972
VL - 163-164
SP - 19
EP - 24
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -