Japanese National Railways

The Japan Steel Works, Ltd.

Yasuo Takenaka

Takashi Shima

Shunichi Tomizuka

Tomoharu Ashikawa

Taro Tsujimura

Katuro Takasawa

A composite metal material for a friction brake composed of a sliding friction surface metal layer of grey cast iron and a layer of a high strength different metal having a crack transmission resistance. The grey cast iron and high strength different metal are metallurgically bonded together. In this composition metal material, cracks formed in the sliding friction surface metal layer are prevented from spreading by the high strength different metal having a high crack transmission resistance. An intermediate metal layer may be provided if desired.

Friction brakes

The present invention relates to improved heat insulating particles with a high heat insulating effect and high mechanical strength. The particles are smooth cells formed around hollow or solid grains of a low heat-conducting material such as silica, alumina, glass, or a synthetic resin like nylon or teflon, which are coated with a material that can readily reflect the heat radiation such as aluminum, copper, gold, silver, stainless steel or titanium. The cells thus-formed are bound together by sintering in the form of a block or any other desirable shape so that the metallic surface cells are bonded together at their points of contact through molecular dispersion of the metal molecules of the respective surfaces.

Heat insulating particles

Growing community of inventors

Kanagawa, Japan

Yasuo Takenaka