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Title: 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.
Inventors:
; ; ; ; ;
Issue Date:
OSTI Identifier:
251108
Assignee:
MSE, Inc., Butte, MT (United States) PTO; SCA: 360101; PA: EDB-96:106263; SN: 96001607228
Patent Number(s):
US 5,529,809/A/
Application Number:
PAN: 8-192,691
Contract Number:
AC22-88ID12735
Resource Relation:
Other Information: PBD: 25 Jun 1996
Research Org:
MSE Inc
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; SPRAY COATING; FASTENERS; SPRAYED COATINGS; EQUIPMENT; DESIGN; LIQUID METALS

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