PROCESS FOR MAKING CORROSION-RESISTANT AMORPHOUS-METAL COATINGS FROM GAS-ATOMIZED AMORPHOUS-METAL POWDERS

• Main Authors: SCHOENUNG, JULIE, FARMER, JOSEPH, C, KAUFMAN, LARRY, AJDELSZTAJN, LEO, YANG, NANCY, PEREPEZKO, JOHN, H, HASLAM, JEFFERY, J, LAVERNIA, ENRIQUE, J, BLUE, CRAIG, A
• Format: Patent
• Language: English; French
• Published: 23.10.2008
• Subjects: CASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; WORKING METALLIC POWDER

A system for the deposition of full-density, pore-free, corrosion- resistant, thermal-spray amorphous-metal coatings for the protection of a less corrosion resistant substrate. The system comprises using particle-size optimization (PSO) to ensure that the amorphous metal particles are small enough to ensure that the critical cooling rate is achieved throughout the amorphous metal particles. L'invention concerne un système de dépôt par pulvérisation thermique de revêtements en métal amorphe pleine densité, sans porosité et résistants à la corrosion, destinés à protéger un substrat moins résistant à la corrosion. Le système consiste à optimiser la dimension granulométrique (PSO) pour faire en sorte que les particules de métal amorphe soient suffisamment petites pour assurer un taux de refroidissement critique dans toute la masse des particules de métal amorphe.