Abstract: A body composed of a zirconium alloy is afforded enhanced corrosion resistance to a high pressure and high temperature steam environment by an integral surface region of .beta.-quenched zirconium formed in situ by laser beam scanning and afforded good mechanical and structural properties by the underlying bulk region whose metallurgical structure is selected to optimize these mechanical properties.
Abstract: A bearing gas sleeve coaxial with the melt ejection crucible is provided in an apparatus for making glassy alloy ribbons to provide a confluent bearing gas flow which minimizes dynamic fluctuations in the molten alloy puddle from which metallic ribbon is formed during chill block melt-spinning. The bearing gas flow causes an improved quench rate and melt puddle stabilization which results in reduced upper ribbon surface texture and improved edge definition.
Abstract: A body of sensitized stainless steel is afforded passivity for exposure to a corrosive environment by an integral surface region of normalized stainless shell formed in situ by laser beam scanning.
Type:
Grant
Filed:
December 22, 1978
Date of Patent:
December 16, 1980
Assignee:
General Electric Company
Inventors:
Harvey E. Cline, Thomas R. Anthony, Harvey D. Solomon
Abstract: A guard ring for processing a wafer of semiconductor material by thermal gradient zone melting has a beveled internal wall surface for supporting the wafer therein. The thickness of the guard ring is about twice the thickness of the wafer.
Type:
Grant
Filed:
December 7, 1978
Date of Patent:
November 18, 1980
Assignee:
General Electric Company
Inventors:
Thomas R. Anthony, Harvey E. Cline, David K. Hartman, Mike F. Chang