National Institute for Materials Science

Denka Company Limited

Seiji Kuroda

Jin Kawakita

Makoto Watanabe

Masayuki Komatsu

Atsushi Sakai

Yoshitaka Taniguchi

Akira Hasegawa

Suzuya Yamada

Hiroshi Araki

A method for manufacturing an aluminum circuit board including a step of spraying a heated metal powder containing aluminum particles and/or aluminum alloy particles to a ceramic base material, and of forming a metal layer on a surface of the ceramic base material. A temperature of at least a part of the metal powder is higher than or equal to a softening temperature of the metal powder and lower than or equal to a melting point of the metal powder at a time point of reaching the surface of the ceramic base material. A velocity of at least a part of the metal powder is greater than or equal to 450 m/s and less than or equal to 1000 m/s at the time point of reaching the surface of the ceramic base material.

Method for manufacturing aluminum circuit board

A cermet coating includes a hard phase and a binder phase that binds the hard phase,

Cermet coating and coated metal body having the cermet coating, method of producing cermet coating, and method of producing coated metal body

A coating method of the invention is characterized by using particles each being an aggregate comprising particles far smaller than that, and heating them at a temperature lower than the melting point and blowing and depositing the same to an object to be treated at a supersonic velocity. The warm spray of the invention is characterized in that standard particles and addition particles with a particle diameter larger than that are mixed so that the K-value determined by the following relation is 1 or more and 2 or less: K=A&#xd7;(B/C)&#xd7;D, A: mass % of the content of additive particles, B: center particle diameter of standard particle (&#x3bc;m), C: center particle diameter of additive particle (&#x3bc;m), D: (maximum particle diameter&#x2212;minimum particle diameter) of additive particle/10 (&#x3bc;m). The invention intends to deposit micro oxide crystals without using an adhesive or the like, with no alteration to the function thereof, and also attain a dense layer with no substantial voids.

Warm spray coating method and particles used therefor

A coating method through HVOF spraying that comprises generating a combustion jet in a combustion chamber connected to one end of a barrel while controlling the temperature of the combustion jet by supply of an inert gas to the jet, feeding resin coating materials into the temperature-controlled combustion jet and leading them to pass through the barrel, and spouting the coating particles through a spout port along with the combustion jet therethrough to thereby coat the substrate surface; wherein the length of the barrel, the temperature of the combustion jet and the physical properties of the coating particles are defined so as to satisfy both the following formulae (1) and (2). 

Growing community of inventors

Tsukuba, Japan

Seiji Kuroda