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, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 10136747
- 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; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
Similar Records
[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)