Oxidation resistance of composite silicide coatings on niobium

Journal Article · Tue Jul 01 04:00:00 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), Journal Name: Inorg. Mater. (Engl. Transl.); (United States) Vol. 22:2; ISSN INOMA
• Country of Publication: United States
• Language: English

Related Subjects

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