Alloys for spark ignition device electrode spark surfaces
OwnerJames D. Lykowskiinventor
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Abstract
An electrode for a spark ignition device, including a spark plug, which includes an alloy consisting essentially of, in weight percent, at least 15% Ni and the balance substantially Pt, and more particularly 15-45% Ni and the balance substantially Pt; 5-35% W, and the balance substantially Pd; and 5-15% Ni, 5-15% Pt, less than 10% Ir, and the balance substantially Pd.
Claims4
A spark ignition device having a center electrode and a ground electrode and each including a noble metal-based firing tip joined to the respective electrodes to present respective sparking surfaces of said sparking tips defining a spark gap in a space therebetween, said sparking tips being fabricated of an alloy consisting essentially of, in weight percent, 20-45% Pd, 2-18% Ir, less than 5% W and the balance substantially Pt, wherein the amount of said Pt is greater than 50%.
Dependencies are inferred from the claim text.