Galvanically-active in situ formed particles for controlled rate dissolving tools

  • US 9,903,010 B2
  • Filed: 04/17/2015
  • Issued: 02/27/2018
  • Est. Priority Date: 04/18/2014
  • Status: Active Grant
First Claim
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1. A method of controlling the dissolution properties of a magnesium composite to enable the controlled dissolving of the magnesium composite comprising of the steps of:

  • heating magnesium or a magnesium alloy to a point above its solidus temperature;

    adding an additive material to said magnesium or magnesium alloy while said magnesium or magnesium alloy is at a temperature that is above said solidus temperature of magnesium or magnesium alloy and a temperature that is less than a melting point of said additive material to form a mixture to form a mixture, said additive material having a greater melting point temperature than said solidus temperature of said magnesium or magnesium alloy, said additive material constituting about 0.05 wt %-45 wt % of said mixture, said additive material including one or more metals selected from the group consisting of copper, nickel, cobalt, titanium, and iron;

    dispersing said additive material in said mixture while said magnesium or magnesium alloy is above said solidus temperature of magnesium or magnesium alloy; and

    ,cooling said mixture to form said magnesium composite, said magnesium composite including in situ precipitation of galvanically-active intermetallic phases.

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