Oxidation resistance of composite silicide coatings on niobium

Journal Article · Tue Jul 01 00:00:00 EDT 1986 · Inorg. Mater. (Engl. Transl.); (United States)

OSTI ID:6971520

Gloshko, P I; Kurtsev, N F; Lisichenko, V I; Nadtoka, V N; Petrenko, M I; Zmii, V I

This paper reports the oxidation of NbSi/sub 2/-MoSi/sub 2/ composite silicide coatings produced by diffusive siliconizing of molybdenum films on a niobium surface. Molybdenum-coated niobium was siliconized and an x-ray microspectral analysis of the composite silicide coating showed the phase composition to be an ca 80-um-thick outer molybdenum disilicide film with a characteristic coarsely crystalline columnar structure, and inner ca 20-um film of niobium disilicide consisting of the tiny columnar crystals, and a substrate/coating interface comprising a thin, 2-3 um film of lower silicide, i.e., Nb/sub 5/Si/sub 3/. The average grain sizes, unit cell parameters, and x-ray determined densities of the Mo films obtained by various methods are shown.

• Research Organization: Institute of Engineering Mechanics, Ukrainian SSR Acad of Sci.
• OSTI ID: 6971520
• Journal Information: Inorg. Mater. (Engl. Transl.); (United States), Vol. 22:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MOLYBDENUM SILICIDES
CORROSION RESISTANCE
DIFFUSION COATING
NIOBIUM
CORROSION PROTECTION
PROTECTIVE COATINGS
NIOBIUM SILICIDES
CHEMICAL REACTION KINETICS
CRYSTAL STRUCTURE
DIFFUSION COATINGS
GRAIN SIZE
LATTICE PARAMETERS
OXIDATION
PLASMA ARC SPRAYING
STRUCTURAL CHEMICAL ANALYSIS
X-RAY DIFFRACTION
CHEMICAL REACTIONS
COATINGS
COHERENT SCATTERING
DEPOSITION
DIFFRACTION
ELEMENTS
KINETICS
METALS
MICROSTRUCTURE
MOLYBDENUM COMPOUNDS
NIOBIUM COMPOUNDS
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
SCATTERING
SILICIDES
SILICON COMPOUNDS
SIZE
SPRAY COATING
SURFACE COATING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
360604* - Materials- Corrosion
Erosion
& Degradation
360105 - Metals & Alloys- Corrosion & Erosion