Evaluation of plasma sprayed crucible coatings for melt processing copper-refractory metal alloys
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/pY{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{degree}C and 2100{degree}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:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 5467089
- Report Number(s):
- IS-M-700; CONF-9206135-2; ON: DE92010871
- Resource Relation:
- Conference: 1992 international thermal spray conference, Orlando, FL (United States), 1-5 Jun 1992
- Country of Publication:
- United States
- Language:
- English
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Evaluation of plasma sprayed crucible coatings for melt processing copper-refractory metal alloys
[Evaluation of plasma sprayed crucible coatings for melt processing copper-refractory metal alloys]
Related Subjects
CRUCIBLES
SPRAYED COATINGS
GRAPHITE
TANTALUM
SPRAY COATING
TANTALUM BORIDES
TANTALUM CARBIDES
ZIRCONIUM OXIDES
CHROMIUM ALLOYS
COMPATIBILITY
COPPER BASE ALLOYS
MELTING
NIOBIUM ALLOYS
PLASMA ARC SPRAYING
YTTRIUM OXIDES
ALLOYS
BORIDES
BORON COMPOUNDS
CARBIDES
CARBON
CARBON COMPOUNDS
CHALCOGENIDES
COATINGS
COPPER ALLOYS
DEPOSITION
ELEMENTAL MINERALS
ELEMENTS
METALS
MINERALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
REFRACTORY METAL COMPOUNDS
SURFACE COATING
TANTALUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
360101* - Metals & Alloys- Preparation & Fabrication
360201 - Ceramics
Cermets
& Refractories- Preparation & Fabrication