A permanent magnet having excellent magnetic properties and a device including such a permanent magnet are provided. A permanent magnet consists of a sintered compact having a composition consisting of R: 23 to 27 wt % (R is a sum total of rare-earth elements including at least Sm), Fe: 22 to 27 wt %, Mn: 0.3 to 2.5 wt %, Cu: 4.0 to 5.0 wt %, and a remainder consisting of Co and unavoidable impurities, in which the sintered compact contains a plurality of crystal grains and grain boundary phases, and a concentration of Cu in at least a part of the grain boundary phases is 45 at % or higher.

There is provided a rare earth-cobalt permanent magnet containing 23 to 27 wt % R, 3.5 to 5 wt % Cu, 18 to 25 wt % Fe, 1.5 to 3 wt % Zr, and a remainder Co with inevitable impurities, where an element R is a rare earth element at least containing Sm. It has a metal structure including a cell phase (11) containing Sm.sub.2Co.sub.17 phase and a cell wall (12) surrounding the cell phase (11) and containing SmCo.sub.5 phase.

There is provided a rare earth-cobalt permanent magnet containing 23 to 27 wt % R, 3.5 to 5 wt % Cu, 18 to 25 wt % Fe, 1.5 to 3 wt % Zr, and a remainder Co with inevitable impurities, where an element R is a rare earth element at least containing Sm. It has a metal structure including a cell phase (11) containing Sm.sub.2Co.sub.17 phase and a cell wall (12) surrounding the cell phase (11) and containing SmCo.sub.5 phase.

A sintered material for aluminum die casting can prevent the strength from being lowered even after steam treatment. The sintered material for aluminum die casting is a sintered material used as an insert at the time of aluminum die casting, and contains Cr: 0.71 to 0.97 wt %, Mo: 0.10 to 0.20 wt %, and C: 0.64 to 0.87 wt %, with the remainder being Fe and other unavoidable impurities.

The invention relates to a method for the electrochemical polishing of metal surfaces by means of repeating pulse sequences, wherein at least one anodic pulse is provided, the current intensity of which rises continuously in the time curve up to a specifiable value. The invention further relates to the use of said method for components produced in 3-D and to a system therefor.

The invention relates to a method for the electrochemical polishing of metal surfaces by means of repeating pulse sequences, wherein at least one anodic pulse is provided, the current intensity of which rises continuously in the time curve up to a specifiable value. The invention further relates to the use of said method for components produced in 3-D and to a system therefor.

A part includes a three-dimensional porous metallic workpiece printed via an additive manufacturing process and subsequently subjected to a diffusion-based process to convert at least a portion of the porous metallic workpiece to a ceramic workpiece or an intermetallic workpiece.

A part includes a three-dimensional porous metallic workpiece printed via an additive manufacturing process and subsequently subjected to a diffusion-based process to convert at least a portion of the porous metallic workpiece to a ceramic workpiece or an intermetallic workpiece.

The present invention provides an electrode material for aluminum electrolytic capacitors, the electrode material being capable of exhibiting a high capacitance required for capacitors and having suppressed equivalent series resistance (ESR), and provides a method for producing the electrode material.

The present invention provides an electrode material for aluminum electrolytic capacitors, comprising a sintered body of an aluminum alloy powder on at least one surface of a substrate, wherein the substrate is an aluminum foil substrate or an aluminum alloy foil substrate, and the aluminum alloy powder contains Fe in an amount of 2 to 499 mass ppm.

A sintered metal body contains a composition of ferritic stainless steel, nitrogen, and impurities. The sintered metal body has an interstitial nitrogen solid solution layer which has an average thickness of 200 ?m or more and in which nitrogen atoms are in a form of a solid solution, and a Vickers hardness at a position of a depth of 200 ?m from a surface is 250 or more. In addition, a relative density may be 99.0% or more.