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Impact of Si on the high-temperature oxidation of AlCr(Si)N coatings

Journal of Materials Science & Technology 2022年第5期100卷 91-100页

作者： Nikolaus Jager 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 Montanuniversität LeobenAustria voestalpine eifeler Vacotec GmbH DüsseldorfGermany Institute of Ion Beam Physics and Materials Research Helmholtz-Zentrum Dresden-RossendorfDresdenGermany Department of Physics University of JyvaskylaFinland European Synchrotron Radiation Facility GrenobleFrance Erich Schmid Institute for Materials Science Austrian Academy of SciencesAustria Department of Materials Science Montanuniversität LeobenAustria

The resistance of wear protective coatings against oxidation is crucial for their use at high ***,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,thermogravimetric analysis and X-ray in order to understand the oxidation behavior depending on their ***,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 *** results reveal enhanced oxidation 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 coatings and a simultaneous deceleration of the oxidation *** annealing of the AlCrSiN sample with5 at.%Si at an extraordinary high temperature of 1400℃ for 60 min in ambient air,three zones developed 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 *** varying elemental composition of these zones is furthermore accompanied by micro-structural variations and a complex residual stress development revealed by cross-sectional X-ray *** 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 oxidation.

关键词： AlCrSiN Nanocomposite Cathodic arc Oxidation behaviour Cross-sectional X-ray nanodiffraction

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A demonstration project of Global Alliance against Chronic Respiratory Diseases:Prediction of interactions between air pollution and allergen exposure—the Mobile Airways Sentinel NetworK-Impact of air POLLution on Asthma and Rhinitis approach

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Chinese Medical Journal 2020年第13期133卷 1561-1567页

作者： Mikhail Sofiev Yuliia Palamarchuk Annabelle Bedard Xavier Basagana Josep M.Anto rostislav Kouznetsov Rodrigo Delgado Urzua Karl Christian Bergmann Joao A.Fonseca Govert De Vries Michiel Van Erd Isabella Annesi-Maesano daniel Laune Jean Louis Pepin Ingrid Jullian-Desayes Stephane Zeng Wienczyslawa Czarlewski Jean Bousquet Finnish Meteorological Institute(FMI) Helsinki 00560Finland Barcelona Institute for Global Health Centre for Research in Environmental Epidemiology(CREAL)Barcelona 08003Spain Centro de Investigacion Biomedica en Red de Epidemiologia y Salud Publica(CIBER)Epidemiologia y Salud Publica(CIBERESP) Barcelona 08003Spain Universitat Pompeu Fabra(UPF) Barcelona 08003Spain Institut Hospital del Mar d'lnvestigacions Mediques(IMIM) Barcelona 08003Spain Charite-Universitatsmedizin Berlin Corporate Member of Freie Universitat BerlinHumboldt-Uniersitat zu Berlin and Berlin Institute of HealthComprehensive Allergy-CentreDepartment of Dermatology and AllergyBerlin 10117Germany Center for Health Technology and Services Research(CINTESIS) Center for Research in Health Technology and Information SystemsFaculdade de Medicina da Universidade do Portoand MedidaLda Porto s/n 4200-450Portugal Peercode BV Geldermalsen 4191 NWThe Netherlands Epidemiology of Allergic and Respiratory Diseases Department Institute Pierre Louis of Epidemiology and Public HealthINSERM and Sorbonne UniversiteMedical School Saint AntoineParis 75571France KYomed Innovation Montpellier 34184France Universite Grenoble Alpes Laboratoire HP2GrenobleINSERMU1042 and CHU de GrenobleGrenoble 38000France Bull DSAS Echirolles 38130France Medical Consulting Czarlewski Levalloisand MASK-airMontpellier 92300France University Hospital Montpellier Montpellier 34000France Contre les Maladies Chroniques pour un Vieillissement Actif en Languedoc Roussillon-France MontpellierFrance Charite Universitatsmedizin BerlinHumboldt-Universitat zu Berlinand Berlin Institute of HealthComprehensive Allergy CenterDepartment of Dermatology and AllergyBerlin 10117Germany

This review analyzes the state and recent progress in the field of information support for pollen allergy *** decades,information available for the patients and allergologists consisted of pollen counts,which are vital but *** technology paves the way to substantial increase in amount and diversity of the *** paper reviews old and newly suggested methods to predict pollen and air pollutant concentrations in the air and proposes an allergy risk concept,which combines the pollen and pollution information and transforms it into a qualitative risk *** new index is available in an app(Mobile Airways Sentinel NetworK-air)that was developed in the frame of the European Union grant Impact of Air POLLution on sleep,Asthma and Rhinitis(a project of European Institute of Innovation and Technology-Health).On-going transformation of the pollen allergy information support is based on new technological solutions for pollen and air quality monitoring and *** new information-technology and artificial-intelligence-based solutions help to convert this information into easy-to-use services for both medical practitioners and allergy sufferers.

关键词： Pollen allergy Pollen season Google trends Pollen dispersion modeling System for Integrated modeLling of Atmospheric coMposition model Pollen index Air quality index

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