Tokyo Shibaura Denki Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Akio Ando

Michiyasu Komatsu

Katsutoshi Nishida

Masae Nakanishi

Akihiko Tsuge

Katsutoshi Komeya

Toshihiko Ochiai

Syoji Okada

Koichi Inoue

Kiyoshi Nakamura

Tadashi Miyano

Masato Sakai

Syozi Okada

Shozo Kawasaki

Yuuji Fujimoto

A radial flow turbine rotor comprises a trunconical shaft and a plurality of blades provided on the periphery of the shaft and inclined to the axis of the shaft. The shaft and the blades are integrally formed of ceramics. The profile of the cross section of each blade, taken along a line perpendicular to the axis of the shaft, is straight between the tip and base of the blade. The tip of each blade is 1.2 to 2.0 mm thick, and each blade grows thicker from the tip toward the base.

Radial flow turbine rotor

A sintered ceramic body is manufactured first by preparing a composition containing a binder and a ceramic powder having a particle size distribution given such that 0 to 1 weight % of ceramic particles with a particle size of less than 0.2 .mu.m, 0 to 2 weight % of ceramic particles with a particle size of 0.2 .mu.m to less than 0.5 .mu.m, 5 to 15 weight % of ceramic particles with a particle size of 0.5 .mu.m to less than 1.0 .mu.m, 5 to 15 weight % of ceramic particles with a particle size of 1.0 .mu.m to less than 1.5 .mu.m, 5 to 15 weight % of ceramic particles with a particle size of 1.5 .mu.m to less than 2.0 .mu.m, and 50 to 80 weight % of ceramic particles with a particle size of not less than 2.0 .mu.m. The prepared composition is then injection-molded into a predetermined shape. The binder is removed from the molded body, and the binder-free molded body is sintered.

Method of manufacturing sintered ceramic body

A method of manufacturing a radial flow turbine rotor is disclosed, which comprises the steps of injection molding a rotor body including a conical shaft and a plurality of blades formed on the periphery of the shaft and at an angle to the axis of the shaft from a ceramic material using a mold having parting lines corresponding to blade edges such that projections are formed on the blade edges, sintering the molding thus obtained, and grinding the edge surfaces of the blades facing a casing. The blades are thus provided with projections on their inlet and outlet edges which face a fluid passage.

Method of manufacturing radial flow turbine rotor

A cylinder liner for use in an internal combustion engine which is formed of ceramic material having a density higher than 95% of theoretical value and a randomly directed and homogeneous structure. The ceramic liner is composed of silicon nitride, silicon carbide, an oxynitride such as silicon oxynitride and silicon aluminum oxynitride, silicon nitride-silicon carbide or aluminum nitride.

Cylinder liner for an internal combustion engine

Disclosed is a method of producing a sintered body of ceramics, wherein a powder mixture consisting, essentially of at most 10%, exclusive of 0%, by weight of yttrium oxide, at most 10%, exclusive of 0%, by weight of aluminum oxide, at most 10%, exclusive of 0%, by weight of aluminum nitride, at most 5%, exclusive of 0%, by weight of at least one material selected from the group consisting of titanium oxide, magnesium oxide and zirconium oxide, and the balance essentially of silicon nitride is sintered under a non-oxidizing atmosphere.

Sintered Si.sub.3 N.sub.4 body

Method of producing sintered body of ceramics

A prechamber cup for an internal combustion engine which is made of ceramic material and designed to have a sintered and surface finished exterior wall which is to be fit in a cylinder head, a sintered and surface finished passage portion through which a gas is passed and a sintered interior wall forming cup-shaped portion.

Prechamber cup for an internal combustion engine

Growing community of inventors

Kawasaki, Japan

Akio Ando