The present invention relates to an SmFeN magnet material including: 7.0-12 at % of Sm; 0.1-1.5 at % of at least one element selected from the group consisting of Hf, Zr, and Sc; 0.1-0.5 at % of Mn; 10-20 at % of N; and 0-35 at % of Co, with the remainder being Fe and unavoidable impurities. The present invention also relates to an SmFeN bonded magnet including a powder of the SmFeN magnet material and a binder.

A method for producing a water-atomized metal powder, comprising applying water to a molten metal stream, dividing the molten metal stream into a metal powder, and cooling the metal powder, wherein the metal powder is further subjected to secondary cooling with cooling capacity having a minimum heat flux point (MHF point) higher than the surface temperature of the metal powder in addition to the cooling and the secondary cooling is performed from a temperature range where the temperature of the metal powder after the cooling is not lower than the cooling start temperature necessary for amorphization nor higher than the minimum heat flux point (MHF point).

A method of making a machine component includes extruding a supply of an aluminum alloy to produce an extrusion. The extrusion is formed under temperature-limited forming conditions of 275 C. or less to produce a blank. The blank is machined to at least one predetermined tolerance to produce the machine component.

A method of making a machine component includes extruding a supply of an aluminum alloy to produce an extrusion. The extrusion is formed under temperature-limited forming conditions of 275 C. or less to produce a blank. The blank is machined to at least one predetermined tolerance to produce the machine component.

Disclosed are an anisotropic nanocrystalline rare earth permanent magnet and a preparation method thereof. The rare earth permanent magnet includes an REFeB matrix phase and a second phase, wherein the REFeB matrix phase includes main phase RE.sub.2Fe.sub.14B flaky nanocrystallines regularly arranged and an RE-rich phase around main phase grains, the main phase RE.sub.2Fe.sub.14B flaky nanocrystallines having an average grain size in a length direction of 70 nm to 800 nm and an average grain size in a thickness direction of 30 nm to 200 nm; and the second phase includes at least one selected from the group consisting of an M-Cu phase and an MCuO phase, M being at least one selected from the group consisting of Ca and Mg.

Provided is a negative electrode active material that can improve the discharge capacity per volume and charge-discharge cycle characteristics. The negative electrode active material according to the present embodiment contains an alloy phase. The alloy phase undergoes thermoelastic diffusionless transformation when releasing metal ions or occluding metal ions. The oxygen content of the negative electrode active material is not more than 5000 ppm in mass.

Provided is a negative electrode active material that can improve the discharge capacity per volume and charge-discharge cycle characteristics. The negative electrode active material according to the present embodiment contains an alloy phase. The alloy phase undergoes thermoelastic diffusionless transformation when releasing metal ions or occluding metal ions. The oxygen content of the negative electrode active material is not more than 5000 ppm in mass.

Disclosed are an anisotropic nanocrystalline rare earth permanent magnet and a preparation method thereof. The rare earth permanent magnet includes an RE-FeB matrix phase and a second phase, wherein the RE-FeB matrix phase includes main phase RE.sub.2Fe.sub.14B flaky nanocrystallines regularly arranged and an RE-rich phase around main phase grains, the main phase RE.sub.2Fe.sub.14B flaky nanocrystallines having an average grain size in a length direction of 70 nm to 800 nm and an average grain size in a thickness direction of 30 nm to 200 nm; and the second phase includes at least one selected from the group consisting of an M-Cu phase and an M-CuO phase, M being at least one selected from the group consisting of Ca and Mg.

An R-T-B sintered magnet of the present disclosure includes a principal phase that comprises an R.sub.2T.sub.14B compound and a grain boundary phase located in a grain boundary portion of the principal phase. The atomic ratio of B to T in the R-T-B sintered magnet is lower than the atomic ratio of B to T in the chemical stoichiometric composition of the R.sub.2T.sub.14B compound. The relationships 26.0 mass %[Nd]+[Pr]+[Ce]+[La]+[Dy]+[Tb])12 ([O]+[C])27.7 mass %, 0.85 mass %[B]0.94, 0.05 mass %[O][0.30] mass %, 0.05 mass %[M]2.00 mass %, [Tb]0.20 mass %, and [Dy]0.30 mass % are satisfied. A section is included in which at least the Nd concentration or the Pr concentration gradually decreases gradually from the front surface of the magnet toward the interior of the magnet.

In an aluminum alloy, Zn: 5.0-6.5 mass %, Mg: 2.0-3.0 mass %, and Cu: 1.2-2.0 mass % are contained; at least one element among three elements which are Ni: 2.0-5.0 mass %, Ag: 0.5-3.5 mass %, and Li: 0.1-0.4 mass % is contained; contained Si is 0.25 mass % or less and contained Mn is 0.25 mass % or less; remainder is composed of Al and an unavoidable impurity; and tensile strength is 650 MPa or greater. According to this aluminum alloy, an Al alloy with excellent surface treatment properties and high strength can be provided. Higher strength of an Al alloy can reduce product weight. Further, improvement in surface treatment properties can provide stable corrosion resistance and shorten product lead time.