Electrical contact material
AssigneeP. R. Mallory & Co. Inc.
InventorLloyd F. Neely
Life of this patent
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Abstract
An electrical contact material consisting essentially of a highly conductive metal such as gold or silver, a refractory constituent such as tungsten, molybdenum, tantalum, titanium, their carbides, or mixtures thereof and a bonding constituent of at least two metals that form an alloy selected from the iron group (Group VIII of the Periodic Table of the Elements), and copper. The material has improved properties including improved resistance to arc erosion, resistance to bleeding of the highly conductive metal, and resistance to welding or sticking when used as an electrical contact material.
Claims10
A highly conductive-refractory metal containing type electrical contact material consisting essentially of about 12 wt. % to about 69 wt. % of electrically conductive metal selected from Ag and An and mixtures thereof, about 30 wt. % to about 85 wt. % total of at least two refractory constituents selected from W, Mo and Ta, and an effective amount up to about 6 wt. % of a bonding constituent consisting essentially of at least two metals that are capable of forming an alloy with each other selected from the group of Cu and the metals of Group VIII of the Periodic Table of the Elements.
Dependencies are inferred from the claim text.