Accession Number : AD0434441


Title :   STUDY OF DUCTILE COATINGS FOR THE OXIDATION PROTECTION OF COLUMBIUM AND MOLYBDENUM ALLOYS


Descriptive Note : Bimonthly progress rept. no. 4, 1 Jan-29 Feb 1964


Corporate Author : METALS AND CONTROLS INC ATTLEBORO MA


Personal Author(s) : Girard, E H ; Buckinski, J J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/434441.pdf


Report Date : 31 Mar 1964


Pagination or Media Count : 41


Abstract : Oxidation loss rates for platinum and platinum rhodium alloy samples were determined to be 1.98 and 2.40 microinches per hour, respectively, at 2550 F in an air flow of 480 ipm. Tests on coating-base metal composites showed coated TZM and FS-85 to be attacked differently. Molybdenum from the TZM was found to diffuse through the coating and be removed at its surface as a volatile oxide. Oxygen penetrated the coatings on the FS-85 samples in a discontinuous manner, causing blisters of oxide to be formed which eventually burst through the coating. Details of the diffusion-oxidation mechanisms remain to be determined.


Descriptors :   *METAL COATINGS , *PLATINUM , *MOLYBDENUM ALLOYS , *NIOBIUM ALLOYS , *PLATINUM ALLOYS , MICROSTRUCTURE , AIR , HIGH TEMPERATURE , NITRIDES , OXYGEN , OXIDATION , DUCTILITY , DIFFUSION , CLADDING , TITANIUM ALLOYS , TUNGSTEN ALLOYS , PROTECTIVE TREATMENTS , RHENIUM , REFRACTORY COATINGS , BORON COMPOUNDS , RHODIUM ALLOYS , TANTALUM ALLOYS , ZIRCONIUM ALLOYS


Subject Categories : Coatings, Colorants and Finishes
      Metallurgy and Metallography


Distribution Statement : APPROVED FOR PUBLIC RELEASE