Abstract: According to an embodiment, a method for manufacturing a joined metal member includes: disposing a first metal member inside a mold of an injection molding apparatus, the first metal member being made of a first metal material, unevenness being formed over a surface of the first metal member, and an oxide film being formed so as to cover the unevenness; and injecting a second metal material into the mold, and thereby molding a second metal member and joining the second metal member to the first metal member, the second metal material being, when it is injected into the mold, in a semi-molten state, or in a molten state in which a difference between a temperature of the second metal material and a liquidus temperature thereof is smaller than or equal to 30° C.

Abstract: [Problem] To provide a biodegradation accelerator for a biodegradable resin to accelerate biodegradation of the biodegradable resin. [Solution] A biodegradation accelerator for a biodegradable resin, the biodegradation accelerator containing a regenerated cellulose, in which the regenerated cellulose is selected from the group consisting of fibers, molded products including films, powders, cotton-like objects, and intermediate molded bodies, and a biodegradation speed for a biodegradable resin is accelerated compared to a case where the biodegradation accelerator for a biodegradable resin is not used.

Abstract: Provided are a rare earth magnet precursor having a roughened structure on a surface or a rare earth magnet molded body having a roughened structure on a surface, and a method for manufacturing the same. In the rare earth magnet precursor or the rare earth magnet molded body, recesses and protrusions are formed on the surface having the roughened structure, and the recesses and protrusions satisfy at least one of the following (a) to (c): (a) an arithmetic mean height (Sa) (ISO 25178) from 5 to 300 ?m, (b) a maximum height (Sz) (ISO 25178) from 50 to 1500 ?m, and (c) a developed interfacial area ratio (Sdr) (ISO 25178) from 0.3 to 12.

Abstract: A slurry capable of strongly adhering an active material to a surface of a current collector even when heat-dried at high temperature is provided. The slurry according to an embodiment of the present invention contains at least an active material and a fibrous adhesion-imparting component and has a property expressed by Equation (1) below: (Peel strength P60)/(peel strength P80?0.8) (1), where the peel strength P60 is peel strength determined as follows: a laminate of a copper foil/a solidified product/an acrylic plate is prepared by applying the slurry to a surface of a copper foil having a thickness of 15 ?m and drying at 60° C.