The resistance of wear protective coatings against oxidation is crucial for their use at high temperatures.Here,three nanocomposite AlCr(Si)N coatings with a fixed Al/Cr atomic ratio of 70/30 and a varying Si-content of 0 at.％,2.5 at.％and 5 at.％were analyzed by differential scanning calorimetry,thermogravi-metric analysis and X-ray in order to understand the oxidation behavior depending on their Si-content.Additionally,a partially oxidized AlCrSiN coating with 5 at.％Si on a sapphire substrate was studied across the coating thickness by depth-resolved cross-sectional X-ray nanodiffraction and scanning trans-mission electron microscopy to investigate the elemental composition,morphology,phases and residual stress evolution of the oxide scale and the non-oxidized coating underneath.The results reveal enhanced ox-idation properties of the AlCr(Si)N coatings with increasing Si-content,as demonstrated by a retarded onset of oxidation to higher temperatures from 1100℃for AlCrN to 1260℃for the Si-containing coat-ings and a simultaneous deceleration of the oxidation process.After annealing of the AlCrSiN sample with 5 at.％Si at an extraordinary high temperature of 1400℃for 60 min in ambient air,three zones devel-oped throughout the coating strongly differing in their composition and structure:(i)a dense oxide layer comprising an Al-rich and a Cr-rich zone formed at the very top,followed by(ii)a fine-grained transition zone with incomplete oxidation and(iii)a non-oxidized zone with a porous structure.The varying ele-mental composition of these zones is furthermore accompanied by micro-structural variations and a com-plex residual stress development revealed by cross-sectional X-ray nanodiffraction.The results provide a deeper understanding of the oxidation behavior of AlCr(Si)N coatings depending on their Si-content and the associated elemental,microstructural and residual stress evolution during high-temperature oxida-tion.

Nikolaus J?ger;Michael Meindlhumer;Michal Zitek;Stefan Spor;Hynek Hruby;Farwah Nahif;Jaakko Julin;Martin Rosenthal;Jozef Keckes;Christian Mitterer;Rostislav Daniel

Christian Doppler Laboratory for Advanced Synthesis of Novel Multifunctional Coatings at the Department of Materials Science,Montanuniversit?t Leoben,Austria;voestalpine eifeler Vacotec GmbH,Diisseldorf,Germany;Institute of Ion Beam Physics and Materials Research,Helmholtz-Zentrum Dresden-Rossendorf,Dresden,Germany;Department of Physics,University of Jyvaskyla,Finland;European Synchrotron Radiation Facility,Grenoble,France;Erich Schmid Institute for Materials Science,Austrian Academy of Sciences,Austria;Department of Materials Science,Montanuniversit?t Leoben,Austria

材料科学技术（英文版）

[1]Nikolaus J?ger;Michael Meindlhumer;Michal Zitek;Stefan Spor;Hynek Hruby;Farwah Nahif;Jaakko Julin;Martin Rosenthal;Jozef Keckes;Christian Mitterer;Rostislav Daniel-.Impact of Si on the high-temperature oxidation of AlCr(Si)N coatings)[J].材料科学技术（英文版）,2022(05):91-100

AlCr,thermogravi,nanodiffraction

Impact,oxidation,coatings,resistance,wear,protective,against,crucial,their,use,temperatures,Here,three,nanocomposite,fixed,atomic,varying,content,were,analyzed,by,differential,scanning,calorimetry,metric,analysis,ray,order,behavior,depending,Additionally,partially,oxidized,AlCrSiN,sapphire,substrate,was,studied,across,thickness,depth,resolved,sectional,mission,electron,microscopy,investigate,elemental,composition,morphology,phases,residual,stress,evolution,oxide,scale,underneath,results,enhanced,properties,increasing,demonstrated,retarded,onset,higher,from,AlCrN,containing,simultaneous,deceleration,process,After,annealing,sample,extraordinary,ambient,air,zones,oped,throughout,strongly,differing,structure,dense,layer,comprising,rich,formed,very,top,followed,fine,grained,transition,incomplete,iii,porous,these,furthermore,accompanied,variations,plex,development,revealed,provide,deeper,understanding,associated,microstructural,during

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