Abstract: Ni-based alloys comprising 8 to 34 atom % of Al, 2 to 70 atom % of one or more elements selected from the group consisting of Fe, Co, Mn, and Si (providing that each or total of Fe and Co is present in an amount of 2 to 70 atom % and/or each or total of Mn and Si is present in an amount of 2 to 25 atom %), and the balance to make up to 100 atom % of substantially pure Ni, and possessing great strength and high ductility.These alloys enjoy outstanding ductility and strength and, therefore, are ideally useful for various filter materials and composite materials.

Abstract: A recording medium is disclosed, which comprises as the main component an amorphous lead oxide or a lead oxide at the metastable state, having the formula of PbL.sub.x M.sub.y O.sub.z wherein L and M each indicate elements other than Pb and O. The recording mediums are drastically changed in their electrical properties and optical properties by application of heat, due to the characteristics inherent in the main component, and such changes make the recording medium highly useful for recording by laser light or heat.

Abstract: A method of producing a thin metal wire having a circular cross section is disclosed. The wire is produced by providing a molten metal within an extruding device having a nozzle therein. A strip of liquid coolant in motion at a speed of 200 m/min or more is then provided. The molten metal is extruded into the strip of liquid coolant in order to cool and solidify the metal and form the thin metal wire. A high quality thin metal wire is obtained by precisely adjusting the speed of the strip of liquid coolant relative to the speed of the extruded molten metal as well as the angle at which the molten metal is extruded into the liquid coolant strip. The method is capable of economically and continuously producing a high quality thin metal wire on a commercial scale. The method is effective in directly producing a thin metal wire having an amorphous, a nonequilibrium crystalline, or microcrystalline structure.

Abstract: Three basic types of iron-base alloys are disclosed as follows. An iron-base alloy having excellent workability comprising 2 to 60 atomic % of at least one of Ni and Mn, 7.5 to 60 atomic % of Cr, 0.5 to 12 atomic % of Al, 0.5 to 10 atomic % of at least one of C, B and P and the balance consisting substantially of Fe. An iron-base alloy having excellent workability comprising 2 to 60 atomic % of at least one of Ni and Mn, 7.5 to 60 atomic % of Cr, 1 to 15 atomic % of Si, 0.5 to 10 atomic % of at least one of C, B and P and the balance consisting substantially of Fe. Also provided is an iron-base alloy having excellent workability comprising 2 to 60 atomic % of at least one of Ni and Mn, 7.5 to 60 atomic % of Cr, 0.25 to 15 atomic % of Si, 0.5 to 10 atomic % of at least one of C, B and P, 0.02 to 0.5 atomic % of Al, and the balance consisting substantially of Fe. These Fe-base alloys are highly ductile and have high workability.

Abstract: A method of producing fine particles with a particle size of submicron or finer which comprises the steps of:forming closely fine projections on a substrate surface, preferably by sputter-etching using an ionized gas; and thensputtering metallic or non-metallic materials onto the thus treated substrate in an inert gas or a mixed gas of an inert gas and a reactive gas, such as oxygen, the gas pressure of the inert gas or the mixed gas being in the range of from 1.times.10.sup.-4 torr to 1.times.10.sup.-1 torr, and thereby depositing the purposed fine particles in crystalline or amorphous form. The invention method can successfully provide fine particles with desired properties, for example, in size, shape and structure, by adjusting producing conditions or selection of substrate materials and the thus obtained fine particles are very useful in various applications with or without the substrate.

Abstract: Boron nitride containing titanium nitride in an amount of 0.05 to 10 wt. % which is produced at a relatively low temperature, utilizing a chemical vapor deposition technique. In the deposition process, boron, titanium and nitrogen source gases are introduced into an evacuated reactor together with a carrier and/or diluent gas and contacted with a heated substrate previously mounted in the reactor, whereby boron nitride with titanium nitride is deposited onto the substrate. The deposit thus obtained has a high density, a significantly improved heat-shielding ability, a high degree of anisotropy with respect to thermal diffusivity and a high chemical stability. By using such anisotropic boron nitride with BN ceramics, very useful BN type composite ceramics can be produced.

Abstract: An amorphous Co-based metal filament having a circular cross-section made of an alloy composed mainly of Co-Si-B or Co-Me-Si-B (wherein Me is at least one metal selected from the group consisting of Fe, Ni, Cr, Ta, Nb, V, Mo, Mn, W and Zr). This filament is produced by jetting the above alloy into a rotating member containing therein a cooling liquid through a spinning nozzle having a hole diameter which is determined according to the amorphous metal-forming ability (critical thickness to form an amorphous phase) to thereby cool-solidify the jetted molten alloy and form a filament, and then winding the filament continuously on the inner walls of the rotating member by the rotary centrifugal force thereof. This amorphous metal filament is corrosion resistant, is tough and has high electromagnetic characteristics, and is very useful as industrial materials, such as electric and electronic parts, composite materials and fibrous materials.

Abstract: Amorphous metal filaments having a substantially circular cross-section comprising an alloy containing Fe as a main component, and a process for producing such amorphous metal filaments, are described; the process comprises jetting a molten alloy having amorphism forming ability into a revolving body containing a cooling liquid from a spinning nozzle to form a solidified filament by cooling, and continuously winding the filament on the inner wall of said revolving body by means of the centrifugal force of said revolving body, wherein the circumferential rate of revolution of said revolving body is equal to or higher than the rate of jetting of molten metal from the spinning nozzle. These metal filaments have good corrosion resistance, toughness, and high magnetic permeability and are very useful in various industrial applications, such as electric and electronic parts, materials for reinforcement, and fiber materials.

Abstract: A process for the production of a fine amorphous metallic wire is described, comprising melt-spinning an iron family element base alloy having an amorphous substance-forming ability to obtain a fine amorphous metallic wire, and passing the thus-formed fine amorphous metallic wire through a die so as to draw within an area reduction percentage range of from about 5 to about 90%. The thus-produced fine amorphous metallic wire of the iron family element base system is excellent in heat resistance, corrosion resistance, electromagnetic characteristics, and has excellent mechanical properties, such as breaking strength and a degree of drawing at break. Thus, it is very useful for various industrial materials such as electric and electronic parts, composite materials, and fibrous materials.

Abstract: An amorphous iron-based alloy which comprises not more than 25 atom % of Si and 2.5 to 25 atom % of B (providing that the sum of Si and B falls in the range of 15 to 35 atom %), 1.5 to 20 atom % of Cr, 0.2 to 10 atom % of either or both of P and C, and the balance to make up 100 atom % substantially of Fe excels in fatigue property. An amorphous iron-based alloy which contains not more than 30 atom % of at least one element selected from the group consisting of Co, Ni, Ta, Nb, Mo, W, V, Mn, Ti, Al, Cu and Zr in addition to the components making up the aforementioned alloy excels in amorphous texture of forming ability and fatigue property. Since these alloys are also excellent in tensile strength at fracture, thermal resistance, corrosionproofness, and electromagnetic property, they prove highly useful as electromagnetic materials and as reinforcements in various industrial materials.

Abstract: A Mn-based alloy is disclosed. The alloy is comprised of 4 to 30 atomic % of at least one element selected from the group consisting of Al, Ni, and Cr; 1 to 15 atomic % of C, 30 atomic % or less of at least one element selected from the group consisting of Co, Mo, W, Ta, Nb, V, Ti, and Zr; and the balance of alloy making up 100 atomic % being comprised substantially of Mn. The alloy has a nonequilibrium austenite phase. The alloy disclosed has high ductility and workability. The alloy is capable of being cold worked and has excellent tensile strength. The Mn-based alloy can be produced at substantially the same cost as any Fe-based alloy. The disclosed alloy is a nonmagnetic alloy which has been found to be very useful for nonmagnetic electromagnetic parts and composite materials.