Advanced protection against environmental degradation of silver mirror stacks for space application

作     者：Rajendra Kurapati Vincent Maurice Antoine Seyeux Lorena H.Klein Dimitri Mercier Gregory Chauveau Catherine Grees-Besset Loic Berthod Philippe Marcus Rajendra Kurapati;Vincent Maurice;Antoine Seyeux;Lorena H.Klein;Dimitri Mercier;Grégory Chauveau;Catherine Grèzes-Besset;Lo(i)c Berthod;Philippe Marcus

作者机构：PSL Research UniversityCNRS-Chimie ParisTechInstitut De Recherche De Chimie ParisPhysical Chemistry of Surfaces Group11 Rue Pierre Et Marie Curie75005 ParisFrance CILAS MARSEILLE600 Avenue De La Roche FourcadePole ALPHA Sud-Saint Mitre13400 AubagneFrance CNESSous-direction Assurance QualitéService TechnologiesMatériaux Et Procédés18 AvenueÉdouard Belin31401 ToulouseFrance 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第64卷第5期

页      面：1-9页

核心收录：

学科分类：08[工学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Region Ile-de-France 

主　　题：Mirror layers Protection Layers Silver Atmospheric corrosion Accelerated aging Surface analysis Space applications 

摘      要：Protection of silver mirror stacks from environmental degradation before launching is crucial for space applications.Hereby,we report a comparative study of the advanced protection of silver mirror stacks for space telescopes provided by SiO_(2)and Al_(2)O_(3)coatings in conditions of accelerated aging by sulfida-tion.The model silver stack samples were deposited by cathodic magnetron sputtering on a reference silica substrate for optical applications and a surface-pretreated SiC substrate.Accelerated aging was per-formed in dry and more severe wet conditions.Optical micrographic observations,surface and interface analysis by Time-of Flight Secondary Ion Mass Spectrometry(ToF-SIMS)and reflectivity measurements were combined to comparatively study the effects of degradation.The results show a lower kinetics of degradation by accelerated aging of the stacks protected by the alumina coating in comparable test conditions.