Abstract:
The application discloses a rare-earth permanent magnetic powder, a bonded magnet, and a device using the bonded magnet. The rare-earth permanent magnetic powder comprises 4 to 12 at. % of Nd, 0.1 to 2 at. % of C, 10 to 25 at. % of N and 62.2 to 85.9 at. % of T, wherein T is Fe or FeCo and the main phase of the rare-earth permanent magnetic powder is a hard magnetic phase with a TbCu7 structure. Material volatilization can be avoided effectively during a preparation process of the rare earth permanent magnetic powder, thus improving the wettability with a water-cooling roller during the preparation process and final prepared materials are provided with good magnetic properties.
Abstract:
In an aspect, a negative electrode for a lithium secondary battery and a method of manufacturing the same is provided. The negative electrode for the lithium secondary battery includes a negative active material layer.
Abstract:
A Cu—Ga alloy sputtering target includes, as a component composition, Ga: 0.1 to 40.0 at % and a balance including Cu and inevitable impurities, in which a porosity is 3.0% or lower, an average diameter of circumscribed circles of pores is 150 μm or less, and an average crystal grain size of Cu—Ga alloy particles is 50 μm or less.
Abstract:
The invention relates to a method for producing a steel shaped body, particularly, for example, a component for common rail fuel injection valves, comprising the method steps of: forming a powderous composition based on iron oxide, from oxide particles, with the addition of carbon and micro-alloy elements so as to adjust a bainitic microstructure; heating the powderous composition to a sinter temperature; reducing the shaped body obtained by sintering; and cooling the sintered shaped body to room temperature. As a result, from the three essential state phases in a state diagram (10), specifically the ferrite-perlite state range (11), the bainite state range (12) and the martensite state range (13), preferably the bainitic state phase is formed in a medium temperature range by the ferrite-perlite state range (11) being shifted to longer cooling periods and the martensite state range (13) being shifted to lower temperatures.
Abstract:
The present invention relates to ferromagnetic particles comprising an Fe16N2 compound phase in an amount of not less than 70% as measured by Mössbauer spectrum, and at least one metal element X selected from the group consisting of Mn, Ni, Ti, Ga, Al, Ge, Zn, Pt and Si in such an amount that a molar ratio of the metal element X to Fe is 0.04 to 25%, the ferromagnetic particles having a BHmax value of not less than 5 MGOe, and a process for producing the ferromagnetic particles, and further relates to an anisotropic magnet or a bonded magnet which is obtained by magnetically orienting the ferromagnetic particles. The ferromagnetic particles according to the present invention can be produced in an industrial scale and are in the form of Fe16N2 particles comprising different kinds of metal elements having a large BHmax value.
Abstract translation:本发明涉及由Mössbauer光谱测定的不少于70%的Fe 16 N 2化合物相和至少一种选自Mn,Ni,Ti,Ga,Al的金属元素X的铁磁性颗粒, Ge,Zn,Pt和Si,金属元素X与Fe的摩尔比为0.04〜25%,BHmax值为5MGOe以上的铁磁性粒子,以及铁磁性粒子的制造方法 并且还涉及通过磁性取向铁磁性颗粒获得的各向异性磁体或粘结磁体。 根据本发明的铁磁颗粒可以以工业规模生产,并且是包含具有大的BHmax值的不同种类的金属元素的Fe16N2颗粒的形式。
Abstract:
A method for producing a cemented carbide material includes producing an M3C type double carbide (wherein M comprises M1 and M2; M1 represents one or more elements selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W; and M2 represents one or more elements selected from the group consisting of Fe, Co and Ni) as a main component of the surface portion; reducing heat treating the compact at a vacuum atmosphere; carburizing the resulting WC—Co compact at a temperature of 800 to 1100° C.; subjecting the carburized compact to liquid phase sintering at a temperature of more than 1350° C. to form a sintered body; and coating a surface layer of the sintered body with a compound containing boron and/or silicon and subjecting the coated sintered body to a diffusion heat treatment at a temperature within a range from 1200 to 1350° C.
Abstract:
The present invention provides a WC—Co system (the WC—Co system in the present invention means that it comprises not only hard grains composed mainly of WC and iron group metal powder containing Co, but also at least one kind selected from carbide, nitride, carbonitride and boride of elements in Groups IVa, Va and VIa of the Periodic Table, excluding WC, as hard grains) cemented carbide having high strength and high toughness which is excellent in wear resistance, toughness, chipping resistance and thermal crack resistance. A WC—Co system compact containing an M12C to M3C type double carbide (M represents one or more kinds selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W, and one or more kinds selected from the group consisting of Fe, Co and Ni) as a main component of the surface layer portion is subjected to a carburization treatment, and then subjected to liquid phase sintering so as to adjust the mean grain size of the surface layer WC depending on a liquid crystal sintering temperature as an indicator.
Abstract:
A method for fabricating a magnesium-based composite material, the method includes the steps of: (a) providing a magnesium-based melt and a plurality of carbon nanotubes, mixing the carbon nanotubes with the magnesium-based melt to achieve a mixture; (b) injecting the mixture into at least one mold to achieve a preform; and (c) extruding the preform to achieve the magnesium-based carbon nanotube composite material.
Abstract:
Disclosed are methods of making multi-element, finely divided, alloy powders containing silver and at least two non-silver containing elements and the uses of these powders in ceramic piezoelectric devices.
Abstract:
Disclosed is a method of manufacturing an open cell porous metal, including the steps of mixing a target metal with a low melting point material, having a melting point lower than that of the target metal, to form a mixture; forming a compact by pressurizing the mixture; forming a sintered compact, which open cell micropores are formed, by sintering and polishing the compact; and plating the sintered compact. The present invention has advantages in that pores are easily formed, and the form of the pores can be variously adjusted. Further, the open cell porous metal manufactured by the present invention has an advantage in that the open cell porous metal has various effects or characteristics such as durability, sound-absorbing property, heat resistance, electromagnetic wave blocking, high damping property, high strength, ultra-lightweight, fragrance emission, and fragrance retention, and can thus be used as a functional metal for various uses.