Method for manufacturing an aluminium alloy part by additive manufacturing comprising a step during which a layer of a mixture of powders is locally melted and then solidified, characterised in that the mixture of powders comprises: first particles comprising at least 80% by mass of aluminium and up to 20% by mass of one or more additional elements, and second yttria-stabilized zirconia particles, the mixture of powders comprising at least 1.5% by volume of second particles.

A rare-earth cobalt permanent magnet according to the present disclosure comprises: 24 to 26 mass % of a rare-earth element R including Sm; 25 to 27 mass % of Fe; 4.0 to 7.0 mass % of Cu; 2.0 to 3.5 mass % of Zr; and Co and an unavoidable impurity as a remainder. The rare-earth element R is any one of a combination of Sm and Nd, a combination of Sm and Pr, or a combination of Sm, Nd, and Pr. The rare-earth cobalt permanent magnet includes a cell phase that includes a crystalline phase of a Th.sub.2Zn.sub.17 structure and a cell wall that includes a crystalline phase of an RCo.sub.5 structure enclosing the cell phase, and the concentration of the rare-earth element R in the cell wall is higher than the concentration of the rare-earth element R in the cell phase by no less than 25 atomic %.

A method for producing a rare earth aluminate sintered body includes: preparing a molded body by mixing a fluorescent material having a composition of a rare earth aluminate and a raw material mixture comprising an oxide containing at least one rare earth element Ln selected from the group consisting of Y, La, Lu, Gd, and Tb, an oxide containing Ce, an oxide containing Al, and optionally an oxide containing at least one element M.sup.1 selected from the group consisting of Ga and Sc; and calcining the molded body to obtain a sintered body.

An R-T-B based sintered magnet containing a first heavy rare earth element, in which R includes Nd, T includes Co and Fe, the first heavy rare earth element includes Tb or Dy, the R-T-B based sintered magnet has a region in which a concentration of the first heavy rare earth element decreases from the surface toward the inside, a first grain boundary phase which contains the first heavy rare earth element and Nd but does not contain Co is present in one cross section including the region, and an area occupied by the first grain boundary phase in one cross section including the region is 1.8% or less.

To provide a rare earth magnet ensuring excellent magnetic anisotropy while reducing the amount of Nd, etc., and a manufacturing method thereof. A rare earth magnet comprising a crystal grain having an overall composition of (R2.sub.(1-x)R1.sub.x).sub.yFe.sub.100-y-w-z-vCo.sub.wB.sub.zTM.sub.v (wherein R2 is at least one of Nd, Pr, Dy and Tb, R1 is an alloy of at least one or two or more of Ce, La, Gd, Y and Sc, TM is at least one of Ga, Al, Cu, Au, Ag, Zn, In and Mn, 0<x<1, y=12 to 20, z=5.6 to 6.5, w=0 to 8, and v=0 to 2), wherein the average grain size of the crystal grain is 1,000 nm or less, the crystal grain consists of a core and an outer shell, the core has a composition of R1 that is richer than R2, and the outer shell has a composition of R2 that is richer than R1.

A rare-earth cobalt permanent magnet with good magnetic properties is provided. A rare-earth cobalt permanent magnet contains 23 to 27 mass % R, 3.5 to 5.0 mass % Cu, 18 to 25 mass % Fe, 1.5 to 3.0 mass % Zr in mass and a remainder Co with inevitable impurities, where an element R is a rare earth element at least containing Sm. The rare-earth cobalt permanent magnet has a metal structure including a plurality of crystal grains and a continuously extending grain boundary. A content of Cu in the grain boundary is higher than a content of Cu in the crystal grains, and a content of Zr in the grain boundary is higher than a content of Zr in the crystal grains.

A rare earth magnet includes main phase grains having an R.sub.2T.sub.14B type crystal structure. The main phase grains include B. A concentration ratio A (A=B/B) of the main phase grains is 1.05 or more, where B and B are respectively a highest concentration of B and a lowest concentration of B in one main phase grain.

The present invention relates to bulk magnetic nanocomposites and methods of making bulk magnetic nanocomposites.

A method of forming a permanent magnet includes processing a mixture of mischmetal-FeB particles having an average MM.sub.2Fe.sub.14B grain size below 500 nm and low melting point (LMP) alloy particles into a compact defining grain boundaries between MM.sub.2Fe.sub.14B grains; hot-pressing the compact; and hot-deforming the compact to diffuse the LMP alloy particles into the grain boundaries, thickening the grain boundaries and modifying a surface region composition of the MM2Fe14B grains.

The present invention relates to an RFeB sintered magnet containing: 28% to 33% by mass of a rare-earth element R, 0% to 2.5% by mass of Co (cobalt) (i.e., Co may not be contained), 0.3% to 0.7% by mass of Al (aluminum), 0.9% to 1.2% by mass of B (Boron), and less than 1,500 ppm of O (oxygen), with the balance being Fe, containing an RFeAl phase having an R.sub.6Fe.sub.14-xAl.sub.x structure in a crystal grain boundary, and having a coercivity of 16 kOe or more.