REVETEMENT POUR DISPOSITIF EXTERNE DE CONTROLE THERMO-OPTIQUE D'ELEMENTS DE VEHICULES SPATIAUX, SON PROCEDE DE FORMATION PAR MICRO-ARCS EN MILIEU IONISE, ET DISPOSITIF RECOUVERT DE CE REVETEMENT

摘要

The invention concerns a coating produced by conversion treatment of an outer surface of a semiconductor metal support component ( 12 ) and comprising an inner layer ( 11 ) adhering to the support component ( 12 ) and accepting differential expansion constraints relative thereto, and an outer layer ( 19 ) having low solar absorptivity characteristic alpha and the inner ( 11 ) and outer ( 10 ) layers having jointly a high hemispheric emissivity characteristic epsilon such that the alpha/epsilon ration is less than about 30%, and preferably less than 20%, the outer ( 10 ) and inner ( 11 ) layers consisting of different ceramics from one layer to the other and derived from crystalline forms different from the semiconductor metal or alloy of the metal support component ( 12 ). The invention is applicable to radiative outer surfaces of space vehicles.