Nontoxic low melting point fusible alloy lubrication of electromagnetic railgun armatures and rails
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United States of America Patent
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Feb 18, 2014
Grant Date -
Dec 19, 2013
app pub date -
Sep 20, 2011
filing date -
Sep 20, 2011
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Abstract
A railgun which has a conductive lubricant and system of delivery reduces the electrical resistance and friction of the armature-rail sliding contact, thereby decreasing the amount of heat generated at the electrical contact. The conductive lubricant may be a ternary alloy of bismuth, indium and tin. The system of delivery for the conductive lubricant may include a plurality of surface reservoirs formed in either the rail surface, the armature face, or both.
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