Abstract: The invention relates to a sheathing material for superconducting wires which are deformed during manufacture by drawing or a similar procedure. The superconducting material of the wires is composed of an oxide whose superconducting properties worsen during the deformation so that, in order to recover its original superconducting properties or to further improve them, the material must be subjected to a recovery heat treatment at temperatures above 940.degree. C.Customarily, silver is employed as the sheathing material for such wires. The recovery heat treatment is generally performed at temperatures around 900.degree. C. Experiments have shown that the optimum temperature range for a recovery heat treatment lies between about 940.degree. C. and 1030.degree. C. However, these temperatures were above the melting temperature of silver in an oxygen atmosphere.

Abstract: A gold based alloy containing gold, silver, copper, zinc, silicon, iron, boron, nickel and indium for the manufacture of gold articles is described which has a lower melting point, extended remelting capabilities, high resistance to cracking, improved color consistency and increased ductility.

Abstract: A silver colored metal alloy having improved tarnish resistance is disclosed, which is intended primarily for solid sterling jewelry and utensils and may also be used in silver plating, and does not easily tarnish and corrode. The alloy consists essentially of 80% to 92.5% silver, 4% to 9% palladium, 0% to 10% copper and 0.5% to 1% indium or zinc.

Abstract: The subject of this invention is the development of new alloys along with new processing approaches for the utilization of the alloys. A particular class of alloys comprises at least one noble metal selected from the group comprising gold, palladium, silver and copper and an amount of between about 0.20 weight percent and about 0.80 weight percent of at least one metalloid selected from the group of metalloids consisting of boron, phosphorous, silicon and lithium. Rapid solidification technology in powder fabrication and the addition of metalloids have been combined to produce a new class of palladium based alloys. The metalloid additions greatly increase the hardness, enhance the fine grain structure and aid sintering densification. Net-shape forming is a benefit derived from the characteristics of the new alloys.

Abstract: A gold colored, tarnish and corrosion resistant alloy is disclosed, usable for jewelry, dental purposes and the like. The alloy consists essentially of 24 to 27 percent palladium, 19 to 22 percent indium, 5 to 30 percent copper, 1 to 20 percent gold, and the balance is essentially silver.

Abstract: A gold colored, tarnish and corrosion resistant gold free alloy is disclosed, usable for jewelry, dental purposes and the like. The alloy consists essentially of 24 to 27 percent palladium, 19 to 22 percent indium, 5 to 30 percent copper, and the balance is essentially silver.

Abstract: The present invention relates to a dental amalgam alloy comprising by weight, as alloying ingredients, from about 30 to 70% silver, from about 20 to 35% tin, from about 10 to 30% cooper, from 0 to about 5% indium, from 0 to about 1% zinc and from about 0.01 to 2% of a Group VIII metal selected from the group consisting of platinum, rhodium, iridium and ruthenium.

Abstract: Sulfide tarnish inhibiting of silver base alloys selected from the group consisting of Ag-Cu, Ag-Au, and Ag-Cu-Au is achieved by adding to silver base alloys at least one element with passivating ability and with heat of sulfide formation which exceeds the heat of sulfide formation of silver and in the amount which does not exceed 1.5 weight % as substitute of silver, so as to form a thin layer of oxide of the element which is selected from the group consisting of Cr, Ta, Al, Ti and Th. The layer of oxide is thin and does not affect the properties of silver base alloys. The added element, in the event of damage to the oxide layer, forms a sulfide film of the element before formation of silver sulfide, to thereby protect silver base alloys from tarnishing.

Abstract: The present disclosure relates to a dental amalgam alloy comprising by weight, as alloying ingredients, from about 30 to 70% silver, from about 20 to 35% tin, from about 10 to 30% copper, from 0 to about 5% indium, from 0 to about 1% zinc and from about 0.01 to 2% of a Group VIII metal selected from the group consisting of platinum, rhodium, iridium and ruthenium.

Abstract: By the present invention a dental alloy mixture is provided that is a combination of 20 to 70 percent by weight of cut alloy comprising silver, tin, and copper, with the copper present in an amount of 0 to 30 percent by weight of the cut alloy; and 30 to 80 percent by weight of spherical alloy comprising silver and cooper.

Abstract: Titanium-silver alloys containing specified amounts of silver and titanium and controlled amounts of copper, aluminum and mixtures thereof are suitable for brazing ceramics, other non-metallic and metallic materials. These alloys also may contain controlled amounts of tin, palladium, indium and mixtures thereof.

Abstract: Selenium-containing amalgam alloys for dental restoration comprises 0.1-50% by weight of any one of the following alloy powders (A), (B) and (C) mixed with 50-99.9% by weight of the following amalgam alloy powders (D).(A): Silver alloy powders containing no less than 50% by weight of silver and 0.01-10% by weight of selenium,(B): Copper alloy powders containing no less than 50% by weight of copper and 0.01-5% by weight of selenium,(C): Alloy powders mix of (A) with (B) wherein the total amount of silver and copper is adjusted to no less than 50% by weight, and the amount of selenium to 0.01-10% by weight, and(D): Silver-tin-copper amalgam alloy powders. At least one of the any one of (A), (B) and (C) and (D) may be pre-amalgamated with mercury in an amount of no higher than 3% by weight based on the total weight thereof.

Abstract: The present invention relates to a method for obtaining metallic alloys, to be used particularly in the field of dentistry.This method allows to accomplish a basic face-centered cubic lattice adapted to form the alloys, in which a homogeneous distribution of the atoms of the different elements is obtained, by precisely determining the number of atoms of each element forming the alloy, in close numerical relationship with the number of atoms of the other elements; it also allows the achievement of a plurality of alloys consisting of at least three among the following elements: gold, platinum, palladium, silver and copper, these alloys respecting the physico-chemical specifications necessary in the particular field of dentistry.

Abstract: A novel setting composition for dental purposes comprises a dental silver amalgam alloy composed mainly of silver and tin, and including one or more of copper, zinc, indium, palladium and gold; mercury in an amount sufficient to amalgamate said alloy: and selenium. The selenium may or may not be coated with a metal showing an affinity for mercury, such as silver. The amount of selenium contained is in a range of 0.005 to 5% by weight.

Abstract: A silver-tin-copper-palladium alloy containing from 30 to 70% silver, 15 to 37% tin, at least 13% copper and from 0.05 to 0.95% palladium; and an amalgam thereof.

Abstract: An alloy of about 4 to 10% gold, silver, copper, palladium, indium, zinc and boron producing an alloy with a pleasing yellow color. Tarnish resistance, wear resistance and heft are similar to 10 karat gold with a lesser cost due to the low gold content.

Abstract: Silver base casting alloys for dental use which have a yellow color. They are useful for the manufacture of crowns, bridges and other dental prosthesis and such dental prosthesis are within the scope of the invention. The dental alloys consist essentially of 40-60% silver, 15-20% indium, 8-15% copper, 0.1-2% nickel, 0.1-2% zinc, from 0-10% gold and/or from 0-30% palladium. The total of gold and palladium content is between 10 and 30%.