Accession Number : ADD017938

Title :   Oxidation Resistant Copper.

Descriptive Note : Patent, Filed 15 Nov 93, patented 28 Nov 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Edelstein, Alan S ; Kaatz, Forrest H ; Harris, Vincent G

Report Date : 28 Nov 1995

Pagination or Media Count : 8

Abstract : Oxidation resistant particles composed of copper and at least one metal having a valence of +2 or +3 and having an intermediate lattice energy for the metal in its hydroxide form. The metal is selected from nickel, cobalt, iron, manganese. cadmium, zinc, tin, magnesium, calcium and chromium. In one embodiment, the phases of copper and at least one metal in the particles are separate and the concentration of the metal is greater near the surface of the particles than inwardly thereof. Process for making the oxidation resistant copper particles includes the steps of dissolving a copper salt and a salt of at least one of the metals in a suitable solvent or diluent; forming primary particles of copper and at least one metal in basic form by mixing a base and the salt solution; separating, washing and drying the primary particles; reducing the primary particles to metallic form; and heat treating the particles in metallic form at an elevated temperature.

Descriptors :   *COPPER, *OXIDATION RESISTANCE, *PATENTS, METALS, MAGNESIUM, CALCIUM, SOLUTIONS(MIXTURES), HIGH TEMPERATURE, ENERGY, IRON, SURFACES, PARTICLES, ZINC, CADMIUM, VALENCE, TIN, NICKEL, LATTICE DYNAMICS, CHROMIUM, SALTS, HYDROXIDES, DRYING, COBALT, MANGANESE

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE