A high purity of Ru or Pt was deliberately deposited as a middle layer between an alumina-forming Ni–30Al–0.3Dy coating and a Ni3Al-based single-crystal superalloy. It was found that the Ru modified Ni–30Al–0.3Dy coating effectively suppressed the interdiffusion between the coating and the substrate and inhibited the precipitation of topologically close-packed (TCP) phases which impaired the mechanical properties of the superalloy. The 1100°C annealing and oxidation tests suggested that, different from Pt, Ru restricted the inward diffusion of Al from the coating to the substrate, thereby hindering the interdiffusion. And the existence of Ru layer can simultaneously improve the oxidation resistance of the coating.
ShengLY.Microstructure characteristics and mechanical properties of NiAl/Cr(Hf, Ho) in situ composite. Mater Res Innov. 2015;19:111–115. doi:10.1179/1432891715Z.0000000001938.
2.
CaoXZ, HeJ, ChenH, The formation mechanisms of HfO2 located in different positions of oxide scales on Ni-Al alloys. Corros Sci. 2020;167:108481, doi:10.1016/j.corsci.2020.108481.
3.
LiDQ, GuJ, LiuSC, Negative effect of Hf and Zr co-doping on alumina film growth of nickel-aluminium single-crystals during thermal cyclic oxidation. Corros Eng Sci Technol. 2022;57(3):214–222. doi:10.1080/1478422X.2021.2016090.
4.
OskayC, GaletzMC, MurakamiH.Mechanical behaviour of conventional, Pt- and Pt/Ir-modified NiAl diffusion coatings after thermo cyclic exposure at 1100°C. Mater High Temp.2019;36(5):404–416. doi:10.1080/09603409.2019.1591064.
5.
AghayarY, KhorasanianM, LotfiB.High temperature behavior of diffusion aluminide coating on alloy 600 superalloy. Mater High Temp. 2018;35(4):343–354. doi:10.1080/09603409.2017.1355091.
6.
KuznetsovVP, LesnikovVP, MorozEV, Structure and phase composition of complex refractory coating and of the reaction zone of interaction with single-crystal alloy ZhS36-VI after high-temperature holds. Met Sci Heat Treat. 2013;55:203–208. doi:10.1007/s11041-013-9606-8.
7.
ZhongJY, MuRD, HeLM.High temperature oxidation behaviour of plasma carburised Ni based single crystal superalloy with NiCoCrAlYHf high temperature oxidation protective coatings. Mater Res Innov. 2014;18(4):1115–1120. doi:10.1179/1432891714Z.000000000859.
8.
SatoA, HaradaH, KawagishiK.Development of a new bond coat “EQ coating” system. Metall Mater Trans A. 2006;37:789–790. doi:10.1007/s11661-006-0050-x.
9.
HeJ, ZhangZ, PengH, The role of Dy and Hf doping on oxidation behavior of two-phase (γ′+β) Ni–Al alloys. Corros Sci. 2005;98:699–707. doi:10.1016/j.corsci.2015.06.016.
10.
NaritaT.Diffusion barrier coating system concept for high temperature applications. Can Metall Q. 2011;50(3):278–290. doi:10.1179/1879139511Y.0000000014.
11.
XuYX, LuoXT, LiCX, Effect of annealing conditions on in situ formation of Cr2O3 diffusion barrier. Surf Eng. 2016;33(3):210–216. doi:10.1080/02670844.2016.1202672.
12.
DaroonparvarM, YajidMAM, KayCM, Effects of Al2O3 diffusion barrier layer (including Y-containing small oxide precipitates) and nanostructured YSZ top coat on the oxidation behavior of HVOF NiCoCrAlTaY/APS YSZ coatings at 1100 °C. Corros Sci. 2018;144:13–34. doi:10.1016/j.corsci.2018.07.013.
13.
HosseiniSH, MirdamadiS, RastegariS.Investigating efficiency of α-Al2O3 diffusion barrier layer in oxidation of EB-PVD NiCrAlY coatings. Surf Eng. 2015;31(2):146–155. doi:10.1179/1743294414Y.0000000365.
14.
Li WZ, Wang QM, GongJ.Interdiffusion reaction in the CrN interlayer in the NiCrAlY/CrN/DSM11 system during thermal treatment. Appl Surf Sci. 2009;255(18):8190–8193. doi:10.1016/j.apsusc.2009.05.023.
15.
XueKH, RenTL, XieD, Nitrogen-rich titanium nitride serving as Pt-Al diffusion barrier for FeRAM application. Integr Ferroelectr. 2008;96(1):19–26. doi:10.1080/10584580802074025.
16.
WangY, GuoHB, PengLQ, Processing and microstructure of NiRuAl diffusion barrier coating on Ni-based superalloy. Surf Eng. 2011;27(4):253–258. doi:10.1179/174329409X446359.
17.
YangYF, JiangCY, YaoHR, Preparation and enhanced oxidation performance of a Hf-doped single-phase Pt-modified aluminide coating. Corros Sci.2016;113:17–25. doi:10.1016/j.corsci.2016.09.014.
18.
NaritaT, ThosinKZ, FengqunL, Development of Re-based diffusion barrier coatings on nickel based superalloys. Mater Corros. 2005;56:923–929. doi:10.1002/maco.200503924.
19.
LittnerA, PedrazaF, KennedyAD, Performance and thermal stability of Pt-modified Al-diffusion coatings for superalloys under cyclic and isothermal conditions. Mater High Temp. 2005;22(3-4):411–420. doi:10.1179/mht.2005.048.
20.
TryonB, CaoF, MurphyKS.Ruthenium-containing bond coats for thermal barrier coating systems. JOM. 2006;58(1):53–59. doi:10.1007/s11837-006-0069-x.
21.
WangD, PengH, GongS, Nialhf/Ru: promising bond coat materials in thermal barrier coatings for advanced single crystal superalloys. Corros Sci. 2014;78:304–312. doi:10.1016/j.corsci.2013.10.013.
22.
BaiB, GuoH, PengH, Cyclic oxidation and interdiffusion behavior of a NiAlDy/RuNiAl coating on a Ni-based single crystal superalloy. Corros Sci. 2011;53:2721–2727. doi:10.1016/j.corsci.2011.04.025.
23.
PintBA, HaynesJA, BesmannTM.Effect of Hf and Y alloy additions on aluminide coating performance. Surf Coat Technol. 2010;204:3287–3293. doi:10.1016/j.surfcoat.2010.03.040.
24.
LiD, GuoH, WangD, Cyclic oxidation of β-NiAl with various reactive element dopants at 1200°C. Corros Sci. 2013;66:125–135. doi:10.1016/j.corsci.2012.09.010.
25.
WangYL, ZhuoLC, YinEH, Microstructural evolution for a single-crystal superalloy after high-temperature treatments with different holding times. Mater Sci Technol. 2022;38(12):836–841. doi:10.1080/02670836.2022.2065737.
26.
TepyloN, HuangX, YangQ.Al depletion and elemental redistribution in PtAl coated CMSX-4 and IN738LC after high-temperature exposure. Mater High Temp.2019;36(6):499–510. doi:10.1080/09603409.2019.1642556.
27.
Wolff IM, SauthffG.Role of an intergranular phase in RuAl with substitutional additions. Acta Mater. 1997;45(7):2949–2969. doi:10.1016/S1359-6454(96)00389-8.
28.
TryonB, FengQ, Pollock TM.Multilayered ruthenium-modified bond coats for thermal barrier coatings. Metall Mater Trans A. 2006;37(11):3347–3358. doi:10.1007/BF02586169.
29.
ChakravortyS, WestF.The constitution of the Ni-Al-Ru system. J Mater Sci. 1986;21:2721–2730. doi:10.1007/BF00551479.
30.
ZhangZ, BaiB, PengH, Effect of Ru on interdiffusion dynamics of β-NiAl/DD6 system: A combined experimental and first-principles studies. Mater Des. 2015;88:667–674. doi:10.1016/j.matdes.2015.09.041.
31.
PetriMC, KeiserDD.Analysis of interdiffusion in multi-phase systems. Scr Mater. 1997;37(6):821–828. doi:10.1016/S1359-6462(97)00188-7.
32.
KevinMD, Ram-MohanLR, DayanandaMA.Determination and assessment of ternary interdiffusion coefficients from individual diffusion couples. JPEDAV. 2005;26:579–590. doi:10.1007/s11669-005-0003-x.
33.
DayanandaMA.An analysis of concentration profiles for fluxes, diffusion depths, and zero-flux planes in multicomponent diffusion. Metall Mater Trans A. 1983;14(9):1851–1858. doi:10.1007/BF02645555.
34.
Dayananda MA.Average effective interdiffusion coefficients and the Matano plane composition. Metall Mater Trans A. 1996;27(A):2507–2509. doi:10.1007/BF02652344.
35.
DivyaVD, RamamurtyU, PaulA.Effect of Pt on interdiffusion and mechanical properties of the γ and γ′ phases in the Ni-Pt-Al system. Philos Mag. 2012;92(17):2187–2214. doi:10.1080/14786435.2012.669073.
