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US 4,728,488 AGranted
Wear resistant zirconium base alloy article for water reactors
AssigneeWestinghouse Electric Corp.
InventorsJames E. Gillett, Donald G. Sherwood, Larry A. Shockling
Life of this patent
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Abstract
Slender water displacer rods for use in water reactors are provided with rings of a wear resistant coating spaced along the length of the rod. Each coating contains Cr.sub.2 C.sub.3 and is metallurgically applied and bonded to the zirconium base alloy forming the outer portion of the rod by electrospark-deposition (ESD) technique.
Claims4
In a water reactor operating environment, the combination having improved fretting wear resistance comprising:
- an elongated tubular water displacer rod;
- having a low neutron absorption cross section
- guide support plates distributed along the length of said water displacer rod;
- said water displacer rod intersecting said guide support plates through apertures in said guide support plates;
- said water displacer rod having a plurality of spaced apart annular electrospark deposited coatings, each said coating facing the wall of a respective said aperture, said electrospark deposited coatings comprising Cr.sub.2 C.sub.3 ;
- wherein said water displacer rod has a tube wall composed of a zirconium base alloy;
- and wherein said guide support plates are composed of a stainless steel alloy.
4 more elements
Dependencies are inferred from the claim text.