Sumitomo Electric Industries, Limited

Sumitomo Electric Sintered Alloy, Ltd.

Shigeki Egashira

Tomoyuki Ishimine

Takayuki Tashiro

Kazunari Shimauchi

Masatoshi Majima

Koji Nitta

Chihiro Hiraiwa

Atsushi Fukunaga

Munehiro Noda

Kosuke Tominaga

A sintered material includes a composition composed of iron-based alloy, and a texture containing 200 or more and 1350 or less of compound particles having a size of 0.3 μm or more per unit area of 100 μm×100 μm in a cross section, and a relative density is 93% or more.

Sintered material and method of manufacturing sintered material

A method of making a sintered body includes a step of preparing raw material powder containing powder of inorganic material, a step of producing a powder compact having a high-density portion with a relative density of 93% or more and a low-density portion with a relative density of less than 93% by compressing the raw material powder injected into a mold, a step of producing a machined compacted part by machining at least the high-density portion of the powder compact, and a step of sintering the machined compacted part to make a sintered body, wherein a perimeter shape of a cavity constituted by the mold in a cross-section perpendicular to an axial direction of the mold is such than a maximum stress applied to an inner perimeter surface of the mold during a compacting process using the mold is less than or equal to 2.6 times an imaginary maximum stress that is applied to an inner perimeter surface of an imaginary mold during a compacting process using the imaginary mold, the imaginary mold having an imaginary cavity that has a same area as the cavity and that has a circular perimeter shape.

Method of making sintered body, and powder compact

A sintered gear of annular shape which has a composition including a metal, has a plurality of pores in a surface thereof, and has a relative density of 93% or more and 99.5% or less.

Sintered gear

A gas decomposition apparatus having any one of the following structures: 1) a structure wherein an anode and a cathode on a solid electrolyte layer each have extended regions; the extended regions of the anode and those of the cathode are alternately extended to have a gap between the anode and the cathode; the cathode is higher in electric resistance than the anode; and a cathode electroconductive region connected electroconductively to a power source and made of an electroconductive material is extended in a direction crossing the direction in which the extended regions of the cathode are extended, thereby connecting the extended regions of the cathode electroconductively to each other; and (2) a structure which has an electroconductor layer through which the negative electrode of a power source is electroconductively connected to a cathode; and which is a structure wherein the cathode is laminated on the electroconductor layer to contact the layer, laminates each composed of a solid electrolyte layer and an anode are positioned on the cathode to have a gap between any adjacent two of the laminates, and the anodes are electroconductively connected to the positive electrode of the power source.

Gas decomposition apparatus

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Osaka, Japan

Shigeki Egashira