Abstract: A permanent-magnet alloy having the formulaRE(Co.sub.1-u-v-w-x-y Fe.sub.u Mn.sub.v Cr.sub.w V.sub.x X.sub.y).sub.zwherein RE is samarium, cerium, cerium misch metal (MM), psaseodymium, neodymium, lanthanum or mixtures thereof, X is Al, Cu or mixture thereof, and0 .ltoreq. u < 0.150 .ltoreq. v < 0.150 .ltoreq. w < 0.100 .ltoreq. x < 0.100.05 < y < 0.206.5 < z < 8.

Abstract: An annealing separator for use on grain-oriented silicon steel strip comprises a magnesium oxide base composition containing rare earth metal oxides. The rare earth metal oxides are present in an amount of 0.8 to 30% by weight of the composition; but in the lower range of 0.8 to 5% by weight, and preferably up to 7% by weight, the oxides have a particle size of less than 325 mesh, and a fraction of 35-55% by weight smaller than 500 mesh. Alkali metal silicate may be present in an amount 5 to 45% by weight. Strip coated with annealing separator of the invention is characterized in that the coating is almost totally free of surface cavities, in that the denitriding and desulfuring rates are greatly accelerated, in that the surface resistivity of the coating is substantially increased, and in that the coating adheres more strongly to the strip.

Abstract: A uniform and high adhesive heat-resistant insulating film can be formed on a silicon steel sheet by applying an annealing separator consisting mainly of magnesia and containing 1-10% of titanium oxide having such a particle size that at least 99.5% of the agglomerated particles passes through 325-mesh sieve and having a dispersion degree in water of at least 85%.

Abstract: A process is provided for improving magnetic properties of certain glassy metal alloys which comprises immersing toroidally wound cores of glassy metal alloy filaments in a thermally stable, nonferromagnetic, electrically inert and chemically unreactive liquid, maintaining the liquid at a temperature of between about 310.degree. and 350.degree. C for about 3/4 to 8 hrs., depending on the temperature selected, and cooling the filament to about 25.degree. C at a rate not greater than about 30.degree. C/min. through its Curie temperature. Optionally, a magnetic field of about 1 to 10 Oe may be applied circumferentially around the cores during cooling through the Curie temperature to further improve the magnetic properties of the glassy metal alloy.

Abstract: A pretreatment of cold-rolled steel sheet for annealing so as to suppress graphite formation on the surface thereof and nitrogenization during the annealing for recrystallization, by causing an effective amount of sulfur, aluminum, tin, arsenic, lead, antimony, bismuth, selenium, and/or tellurium to exist on the steel sheet surface.

Abstract: An extrusion billet is fabricated from layers of soft magnetic material separated by one or more metal layers. The billet is coreduced and heat treated to impart the desired magnetic properties to the soft magnetic material and also to form intermetallic insulating layers between the magnetic layers. Electric field shield sections are formed in a similar manner by placing relatively thick layers of copper between adjacent layers of metal located adjacent to the layers of soft magnetic material. The layers of soft magnetic metal can also be separated by a layer of semiconductor material; or a metal foil having a semiconductor-forming or high electrical resistivity forming material deposited thereon. In the latter case no extrusion is required. Instead, pressure and heat cause the materials to react and form either a semiconductor layer or a layer with an electrical resistivity higher than about 10.sup..sup.-4 ohm-cm between adjacent layers of soft magnetic metal.

Abstract: Cube textured nickel strip produced by process of working and heat treating sulfur-containing nickel metal billets having specially controlled composition and grain size.

Abstract: A coating composition containing 75-95% MgO, 2-10% B.sub.2 O.sub.3 and 0-15% C, which is effective in retarding oxidation of ferrous metal articles, especially at temperatures in excess of 2150.degree.F. Additional protection is achieved when about 11-17% TiO.sub.2 is substituted for about the same amount of MgO. The composition is admixed with a suitable vehicle and is applied to the metal surface in the form of a dispersion, suspension or as a slurry.

Abstract: Coatings for silicon steel comprised of MgO, an amorphous magnesia-silica complex and a boron bearing compound.

Abstract: Insulative coatings for electrical steels and methods of making them. The coatings are hard, glassy and smooth in nature, are easily cured and improve the magnetic characteristics of the electrical steels. The coatings are produced by applying to an electrical steel an aluminum-magnesium-phosphate solution containing Al.sup.+.sup.+.sup.+, Mg.sup.+.sup.+ and H.sub.2 PO.sub.4 .sup.- in a specified relative relationship and from 0 to 60% by weight colloidal silica on a water-free basis. The solutions contain at least 45% by weight water. Chromic anhydride (CrO.sub.3) may be added to the coating solutions to improve wettability of the solutions, moisture resistance of the resulting coatings and interlaminar resistivity after stress relief anneal. An electrical steel coated with a solution of the present invention is thereafter subjected to a heat treatment to cure the insulative coating thereon.

Abstract: There is disclosed a magnetic core and the method of making the same. The core is formed of a plurality of microlaminations. Since each discrete microlamination is of elongated rectangular shape, soft, ductile and magnetically insulated, the cores exhibit improved permeability, lower core loss, lower exciting volt amps and exhibit improved high frequency characteristics.

Abstract: Coatings for silicon steel comprised of MgO, an amorphous magnesia-silica complex and a boron bearing compound.

Abstract: Coatings for silicon steel comprised of MgO, an amorphous magnesia-silica complex and a lithium bearing compound.

Abstract: Magnesium oxide coating compositions, process for their preparation and process for applying said compositions as adherent dried coatings which when annealed form relatively non-porous insulations providing improved electrical insulating properties. The coating compositions comprise a major proportion of magnesium oxide and a minor proportion of zinc permanganate and magnesium sulfate, wherein the concentration of zinc permanganate is from about 4 to about 16 parts per 100 parts of magnesium oxide and the concentration of magnesium sulfate is at least about 50 parts per 100 parts of zinc permanganate.

Abstract: Novel amorphous magnesia-silica complexes containing from about 0.001 to 2.0 percent by weight of an alkali metal oxide, wherein the mole ratio of MgO:SiO.sub.2 of said complexes is from about 1:25 to 14:1.

Abstract: Coatings for silicon steel comprised of MgO, an amorphous magnesia-silica complex and a lithium bearing compound.

Abstract: A steel object, such as sheet and strip for motors, is provided with a heat-resistant, electrically insulating coating in the form of a layer of calcium titanate. An intermediate layer of silicate may be provided between the steel surface of the object and the layer of titanate. The intermediate layer is preferably a silicate of one or more alkaline earth metals or of aluminum, and especially a silicate of magnesium.The coating of calcium titanate may also contain a vanadium compound. Likewise, a layer of phosphate may be provided on the outside of the layer of titanate.