Effect of bond-coat pre-aluminization and pre-oxidation duplex pretreatment on the performance of ZrO[sub 2]-8 wt. % Y[sub 2]O[sub 3]/Co-29Cr-6AI-1Y thermal barrier coatings

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Oxidation of Metals; (United States)

DOI:https://doi.org/10.1007/BF00664492· OSTI ID:5561268

Lih, W; Wu, B C; Peng, A ^[1]; Chang, E ^[2]; Chao, C H ^[3]

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1. Industrial Technology Research Inst., Hsinchu (Taiwan, Province of China)
2. National Cheng Kung Univ., Tainan (Taiwan, Province of China)
3. Aero Engine Factory/Aero Industry Development Center, Kang-Shan (Taiwan, Province of China)

A modification to the conventional thermal-barrier coating (TBC) system was made. In this study, the low-pressure, plasma-sprayed Co 29Cr 6Al 1Y bond coat received a duplex pretreatment of bond-coat pre-aluminizing and pre-oxidation prior to overlaying the air-plasma sprayed ZrO[sub 2] 8wt.% Y[sub 2]O[sub 3] top coat. The effects of this treatment on the properties of the TBC system were evaluated by thermal-cyclic test at 1050[degrees]C in air. The results of cyclic-oxidation tests showed that the proposed processes could remarkably improve the performance of ZrO[sub 2] 8wt.% Y[sub 2]O[sub 3]/Co-29Cr-6Al-1Y TBC. The improvement was attributed to a modification of bond-coat oxides and the associated reduction of the oxidation rate of the MCrAlY bond coat. 6 refs., 9 figs., 4 tabs.

• OSTI ID: 5561268
• Journal Information: Oxidation of Metals; (United States), Journal Name: Oxidation of Metals; (United States) Vol. 40:3-4; ISSN OXMEAF; ISSN 0030-770X
• Country of Publication: United States
• Language: English

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ALLOYS
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CHROMIUM ALLOYS
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ELEMENTS
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OXIDATION
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