Cyclic Oxidation Behavior of TBC Systems with a Pt-Rich γ-Ni plus γ′-Ni3Al Bond-Coating Made by SPS

被引：11
作者：
Audigie, Pauline [1 ]
Selezneff, Serge [2 ]
Rouaix-Vande Put, Aurelie [1 ]
Estournes, Claude [3 ]
Hamadi, Sarah [4 ]
Monceau, Daniel [1 ]
机构：
[1] ENSIACET, CIRIMAT, CNRS, F-31030 Toulouse, France
[2] SNECMA, F-77550 Rond Point Rene Ravaud, Moissy Cramayel, France
[3] Univ Toulouse 3, CNRS, CIRIMAT, F-31062 Toulouse 9, France
[4] SNECMA, F-91003 Evry, France
来源：
OXIDATION OF METALS | 2014年 / 81卷 / 1-2期
关键词：
TBC systems; Pt-rich gamma-Ni plus gamma '-Ni3Al; Bond-coatings; Thermal cycling; Spallation; SINGLE-CRYSTAL SUPERALLOYS; SUBSTRATE COMPOSITION; ALUMINIDE; ALLOYS;
D O I：
10.1007/s11085-013-9417-8
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
To obtain long-lasting thermal barrier coating (TBC) systems, two types of Pt-rich gamma-Ni+gamma'-Ni3Al bond-coatings (BC) were fabricated by spark plasma sintering (SPS). The former had the highest possible Pt content (Ni-30Pt-25Al in at.%) while the latter had the highest possible Al level (Ni-28Al-17Pt in at.%). Hf was added as a reactive element. TBCs were fabricated on different superalloys (AM1, Ren, N5 and MCNG) with the aforementioned BCs and with zirconia stabilized with yttria top coats made by SPS or electron beam physical vapor deposition (EBPVD). The cyclic oxidation resistance of these systems was studied at 1,100 A degrees C in air. Most TBCs with a Pt-rich gamma-gamma' BC showed better thermal cycling resistance when compared to the reference TBCs (beta-(Ni,Pt)Al diffusion BC and EBPVD ceramic top coat), with lifetimes up to 1,745 cycles instead of 700 for the reference, and despite the fabrication defects observed within the SPS BCs. Cu was tested as an addition in the BCs and proved to have a slight negative effect on the system lifetime. Moreover, the fourth generation MCNG substrate led to the best cyclic oxidation behavior.
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页码：33 / 45
页数：13
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