Method and apparatus for spraying molten materials
A metal spray apparatus is provided with a supersonic nozzle. Molten metal is injected into a gas stream flowing through the nozzle under pressure. By varying the pressure of the injected metal, the droplet can be made in various selected sizes with each selected size having a high degree of size uniformity. A unique one piece graphite heater provides easily controlled uniformity of temperature in the nozzle and an attached tundish which holds the pressurized molten metal. A unique U-shaped gas heater provides extremely hot inlet gas temperatures to the nozzle. A particularly useful application of the spray apparatus is coating of threads of a fastener with a shape memory alloy. This permits a fastener to be easily inserted and removed but provides for a secure locking of the fastener in high temperature environments. 12 figs.
- Research Organization:
- MSE Inc
- DOE Contract Number:
- AC22-88ID12735
- Assignee:
- MSE, Inc., Butte, MT (United States)
- Patent Number(s):
- US 5,529,809/A/
- Application Number:
- PAN: 8-192,691
- OSTI ID:
- 251108
- Resource Relation:
- Other Information: PBD: 25 Jun 1996
- Country of Publication:
- United States
- Language:
- English
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Metal spray apparatus with a U-shaped electric inlet gas heater and a one-piece electric heater surrounding a nozzle
Metal spray apparatus with a U-shaped electric inlet gas heater and a one-piece electric heater surrounding a nozzle