Al含量对HVOF-NiCrAlY+APS-nYSZ热障涂层热循环行为的影响

Influence of Al content on thermal cycling behavior of HVOF-NiCrAlY+APS-nYSZ thermal barrier coatings

摘要

NiCrAlY是燃气轮机热障涂层经常采用的金属黏结层材料，本工作研究用于制造燃气轮机两种Al含量的NiCrAlY粉末对HVOF-NiCrAlY+APS-纳米结构YSZ（nanostructured YSZ，nYSZ）热障涂层在室温和1150 ℃之间热循环行为的影响。结果表明，HVOF-Ni25Cr5Al0.5Y表面Al₂O₃-TGO的生长速率低于HVOF-Ni22Cr10Al1Y。与微米结构YSZ（microstructured YSZ，mYSZ）/mYSZ界面相同，nYSZ/mYSZ界面也可成为裂纹源，导致在nYSZ层中形成局部裂纹网络。两种HVOF-NiCrAlY+APS-nYSZ热障涂层的失效方式与传统APS/HVOF-MCrAlY（M=Ni和Co）+APS-mYSZ相同，主要由于靠近HVOF-NiCrAlY/APS-nYSZ界面nYSZ层裂纹扩展与合并，Ni25Cr5Al0.5Y+nYSZ热循环寿命比Ni22Cr10Al1Y+nYSZ略高。同时，提高APS-YSZ层中YSZ/YSZ界面结合力，避免YSZ/YSZ界面和APS-YSZ外表面开裂，可以有效提高HVOF-MCrAlY+APS-YSZ热障涂层热循环寿命。

Abstract

NiCrAlY is a commonly used metallic bond coat material for thermal barrier coating in gas turbines. This study investigates the effect of two NiCrAlY powders with different aluminum contents for gas turbine fabrication on the thermal cycling behavior of HVOF-NiCrAlY+APS-nanostructured YSZ (nYSZ) thermal barrier coatings (TBCs) within the temperature range from room temperature to 1150 ℃. The results show that the growth rate of the Al₂O₃ thermally grown oxide (TGO) on the surface of HVOF-Ni25Cr5Al0.5Y is lower than that of HVOF-Ni22Cr10Al1Y. Similar to the microstructured YSZ (mYSZ)/mYSZ interface, the nYSZ/mYSZ interface can also act as a crack initiation site, leading to the formation of a local crack network in the nYSZ layer. The failure mechanism of two HVOF-NiCrAlY+APS-nYSZ TBCs is consistent with that of the traditional APS/HVOF-MCrAlY (M=Ni and Co)+APS-mYSZ system, which is mainly attributed to the propagation and coalescence of cracks in the nYSZ layer adjacent to the HVOF-NiCrAlY/APS-nYSZ interface. The thermal cycling lifetime of the Ni25Cr5Al0.5Y+APS-nYSZ coating is slightly longer than that of the Ni22Cr10Al1Y+APS-nYSZ coating. Meanwhile, it can effectively improve the thermal cycling life of HVOF-MCrAlY+APS-YSZ TBCs to increase the bonding strength of the YSZ/YSZ interface in the APS-YSZ layer and avoid cracking at the YSZ/YSZ interface and the outer surface of the APS-YSZ.

关键词

燃气轮机 / 热障涂层 / HVOF-NiCrAlY / Al含量 / APS-nYSZ / 热循环行为

Key words

gas turbine / thermal barrier coating / HVOF-NiCrAlY / Al content / APS-nYSZ / thermal cycling behavior

参考文献

[1] NICHOLLS J R . Advances in coating design for high-performance gas turbines[J].MRS Bulletin, 2003, 28(9): 659-670.

[2] WALSTON W S . Coating and surface technologies for turbine airfoils[C]//Superalloys 2004. Champion: The Minerals, Metals & Materials Society, 2004: 579-588.

[3] DAROLIA R. Thermal barrier coatings technology: critical review, progress update, remaining challenges and prospects[J].International Materials Reviews, 2013, 58(6): 315-348.

[4] BOSE S . High temperature coatings[M]. Oxford: Butterworth-Heinemann,2017.

[5] DORFMAN M R, DWIVEDI G, DAMBRA C, et al. Perspective: challenges in the aerospace marketplace and growth opportunities for thermal spray[J].Journal of Thermal Spray Technology, 2022, 31: 672-684.

[6] 刘砚飞，钟燕，陶稀鹏，等 . 镍基单晶高温合金/热障涂层体系的应用研究进展[J].材料工程，2025，53（9）：1-10.

[7] LIU Y F, ZHONG Y, TAO X P, et al. Research progress in application of nickel-based single crystal superalloy/thermal barrier coating system[J].Journal of Materials Engineering, 2025, 53(9): 1-10.

[8] 田伟，郭会明，刘砚飞. 新型热障涂层在先进航空发动机中的应用研究进展[J].航空材料学报，2025，45（6）：68-80.

[9] TIAN W, GUO H M, LIU Y F . Research progress on application of new thermal barrier coatings in advanced aero-engines[J].Journal of Aeronautical Materials, 2025, 45(6): 68-80.

[10] OERLIKON M . Metco materials E-guide [EB/OL]. [2025-03-20].http://mymetco.oerlikon.com/en-us/materials-e-guide.

[11] Praxair Technology . MCrAlY, superior powders for superior coatings [EB/OL]. [2025-03-20].http://www.linde-amt.com/en/materials-and-equipment/materials/thermal-spray-powders/mcraiy.

[12] HÖGANÄS. MCrAlY atmospheric plasma spraying (APS) powder [EB/OL]. [2025-03-20].http://www.hoganas.com/en/powder-technologies/surface-coating/products/plasma-spraying/mcralys.

[13] Powder Alloy Corporation . MCrAlY powders [EB/OL]. [2025-03-20].https://powderalloy.com/thermal-spray-powders/mcraly-powders.

[14] BRUMM M W, GRABKE H J . The oxidation behaviour of NiAl-Ⅰ. phase transformations in the alumina scale during oxidation of NiAl and NiAl-Cr alloys[J].Corrosion Science, 1992, 33(11): 1677-1690.

[15] NIRANATLUMPONG P, PONTON C B, EVANS H E . The failure of protective oxides on plasma-sprayed NiCrAlY overlay coatings[J].Oxidation of Metals, 2000, 53(3): 241-258.

[16] TRUNOVA O, BECK T, HERZOG R, et al. Damage mechanisms and lifetime behavior of plasma sprayed thermal barrier coating systems for gas turbines-part Ⅰ: experiments[J].Surface and Coatings Technology, 2008, 202(20): 5027-5032.

[17] CHEN W R . Degradation of a TBC with HVOF-CoNiCrAlY bond coat[J].Journal of Thermal Spray Technology, 2014, 23(5): 876-884.

[18] CUI Q Z, SEO S M, YOO Y S, et al. Thermal durability of thermal barrier coatings with bond coat composition in cyclic thermal exposure[J].Surface and Coatings Technology, 2015, 284: 69-74.

[19] KARAOGLANLI A C, GRUND T, TURK A, et al. A comparative study of oxidation kinetics and thermal cyclic performance of thermal barrier coatings (TBCs)[J].Surface and Coatings Technology, 2019, 371: 47-67.

[20] LIANG B, DING C X . Thermal shock resistances of nanostructured and conventional zirconia coatings deposited by atmospheric plasma spraying[J].Surface and Coatings Technology, 2005, 197(2/3): 185-192.

[21] WU J, GUO H B, ZHOU L, et al. Microstructure and thermal properties of plasma sprayed thermal barrier coatings from nanostructured YSZ[J].Journal of Thermal Spray Technology, 2010, 19(6): 1186-1194.

[22] CHEN M W, GLYNN M L, OTT R T, et al. Characterization and modeling of a martensitic transformation in a platinum modified diffusion aluminide bond coat for thermal barrier coatings[J].Acta Materialia, 2003, 51(14): 4279-4294.

[23] MEIER S M, NISSLEY D M, SHEFFLER K D, et al. Thermal barrier coating life prediction model development[C]//Turbo Expo: Power for Land, Sea, and Air. New York: American Society of Mechanical Engineering, 1991: V005T13A003.

[24] BECK T, HERZOG R, TRUNOVA O, et al. Damage mechanisms and lifetime behavior of plasma-sprayed thermal barrier coating systems for gas turbines-part Ⅱ: modeling[J].Surface and Coatings Technology, 2008, 202(24): 5901-5908.

[25] BARGRASER C, MOHAN P, LEE K, et al. Life approximation of thermal barrier coatings via quantitative microstructural analysis[J].Materials Science and Engineering: A, 2012, 549: 76-81.

[26] 陈卫杰，郭德亮. APS-/HVOF-CoNiCrAlY+APS-8YSZ热障涂层中TGO增厚与裂纹生长[C]//第二十一届国际热喷涂研讨会暨第二十二届全国热喷涂年会. 天津：中国表面工程协会热喷涂专业委员会，2018：49-57.

[27] CHEN W J, GUO D L . TGO Thickening and Cracking in the APS-/HVOF-CoNiCrAlY+APS-8YSZ TBCs[C]//The 21st International Thermal Spraying Seminar & the 22nd China National Thermal Spraying Conference. Tianjin: China Surface Engineering Association Thermal Spraying Committee, 2018: 49-57.

基金资助

国家青年科学基金(52401093)

辽宁省科技重大专项(2024JH1/11700039)

辽宁省中央引导地方科技发展资金联合基金(IC24ZXK300)