(Evaluation of plasma sprayed crucible coatings for melt processing copper-refractory metal alloys)

Conference · Wed Jan 01 04:00:00 EST 1992

OSTI ID:5545368

A study was made to access the suitability of several plasma arc sprayed coatings applied to graphite for application as containment crucibles for melt processing copper-refractory metal alloys. Coatings of Ta, TaC, TaB{sub 2} and ZrO{sub 2}{center dot}8w/o Y{sub 2}O{sub 3} were evaluated and compared to uncoated graphite. The ZrO{sub 2}{center dot}8w/o Y{sub 2}O{sub 3} coating was sprayed over a tungsten bond coat. Prealloyed samples of Cu-15v/o Cr and Cu-15v/o Nb were placed within the crucibles and heated inductively to 1800{degrees}C and 2100{degrees}C, respectively. Compatibility of the coating-alloy system was evaluated by optical and scanning electron microscopy, EDS, XRD and combustion chromatography.

• Research Organization: Ames Lab., IA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5545368
• Report Number(s): IS-M-698; CONF-9206135--1; ON: DE92008912
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360601* -- Other Materials-- Preparation & Manufacture
ALLOYS
BORIDES
BORON COMPOUNDS
CARBIDES
CARBON
CARBON COMPOUNDS
CHALCOGENIDES
CHROMIUM ALLOYS
COATINGS
COPPER ALLOYS
COPPER BASE ALLOYS
CRUCIBLES
DEFORMATION
DEPOSITION
ELEMENTAL MINERALS
ELEMENTS
GRAPHITE
MELTING
METALS
MINERALS
NIOBIUM ALLOYS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PLASMA ARC SPRAYING
POWDERS
REFRACTORY METAL COMPOUNDS
REFRACTORY METALS
SPRAY COATING
SPRAYED COATINGS
SURFACE COATING
TANTALUM
TANTALUM BORIDES
TANTALUM CARBIDES
TANTALUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES