Plastic article or earthenware shaping or treating: apparatus – Means making particulate material directly from liquid or... – And distinct means applying congealing fluid to formed...
Patent
1994-10-24
1996-12-31
Warden, Robert
Plastic article or earthenware shaping or treating: apparatus
Means making particulate material directly from liquid or...
And distinct means applying congealing fluid to formed...
425 7, 427127, 75332, 75338, 266202, B22F 908
Patent
active
055891993
ABSTRACT:
Apparatus and method for making powder from a metallic melt by atomizing the melt to form droplets and reacting the droplets downstream of the atomizing location with a reactive gas. The droplets are reacted with the gas at a temperature where a solidified exterior surface is formed thereon and where a protective refractory barrier layer (reaction layer) is formed whose penetration into the droplets is limited by the presence of the solidified surface so as to avoid selective reduction of key reactive alloyants needed to achieve desired powder end use properties. The barrier layer protects the reactive powder particles from environmental constituents such as air and water in the liquid or vapor form during subsequent fabrication of the powder to end-use shapes and during use in the intended service environment.
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Anderson Iver E.
Lograsso Barbara K.
Terpstra Robert L.
Dawson E. Leigh
Iowa State University & Research Foundation, Inc.
Timmer Edward J.
Warden Robert
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