航空材料学报2025，Vol.45Issue(2)：73-81,9.DOI:10.11868/j.issn.1005-5053.2024.000095
商用MCrAlY粉末对纳米结构YSZ热障涂层热循环行为的影响
Influence of commercial MCrAlY powders on thermal cycling behaviors of TBCs with nano-structured YSZ
摘要
Abstract
This study investigates the thermal cycling behavior of HVOF-MCrAlY combined with APS-nanostructured YSZ(nYSZ)thermal barrier coatings(TBCs)produced using three commercial MCrAlY powders commonly utilized by gas turbine original equipment manufacturers(OEMs)and maintenance,repair,and overhaul(MRO)companies,within a temperature range from ambient to 1150℃.Among the coatings,HVOF-A386-2.5+APS-nYSZ exhibits the longest furnace cycle testing(FCT)life,while HVOF-A9624+APS-nYSZ has the shortest.However,the differences in FCT life among the three TBCs are insignificant.All three coatings fails in a manner similar to conventional HVOF-MCrAlY+APS-YSZ(mYSZ)coatings,primarily due to crack propagation and coalescence in the APS-YSZ layer near the YSZ/MCrAlY interface,resulting from interface separation at mYSZ/nYSZ and mYSZ/mYSZ interfaces.The thermally grown oxide(TGO)layer grows fastest on the HVOF-A9624 surface,whereas the growth rate is slowest on the HVOF-A386-2.5 surface.However,the variations in TGO growth rates among the three coatings are relatively small.It is anticipated that increasing the surface roughness of the HVOF-MCrAlY may strengthen the YSZ/MCrAlY interface,thus mitigating crack propagation and coalescence in the TBC.Additionally,reinforcing the YSZ/YSZ interface can enhance resistance to interface separation and surface cracking.Furthermore,controlling the aluminum(Al)content in the MCrAlY and/or doping alloy elements into the MCrAlY may slow down diffusion,reducing the TGO growth rate and preventing excessive formation of mixed oxides.These strategies may collectively contribute to improving the durability of HVOF-MCrAlY+APS-YSZ TBCs under thermal cycling conditions.关键词
燃气轮机/热障涂层/HVOF-MCrAlY/APS-nYSZ/热生长氧化物/裂纹扩展/热循环寿命Key words
gas turbine/thermal barrier coating/HVOF-MCrAlY/APS-nYSZ/TGO/crack propagation/thermal cycling life分类
航空航天引用本文复制引用
李超,程玉贤,王璐,陈卫杰..商用MCrAlY粉末对纳米结构YSZ热障涂层热循环行为的影响[J].航空材料学报,2025,45(2):73-81,9.基金项目
国家自然科学基金青年科学基金项目(52401093) （52401093）
辽宁省科技重大专项(2024JH1/11700039) （2024JH1/11700039）
辽宁省中央引导地方科技发展资金联合基金(IC24ZXK300) （IC24ZXK300）
