Fujimi Incorporated

Isao Aoki

Hiroyuki Ibe

Hiroaki Mizuno

Junya Kitamura

Yoshiyuki Kobayashi

Nobuyuki Nagayama

Tatsuo Suidzu

Noriyuki Yasuo

Satoshi Tawada

Sho Hashimoto

A thermal spray powder contains granulated and sintered particles composed of an oxide of any of the rare earth elements having an atomic number from 60 to 70. The average particle size of the primary particles constituting the granulated and sintered particles is 2 to 10 &#x3bc;m. The crushing strength of the granulated and sintered particles is 7 to 50 MPa. A plasma resistant member includes a substrate and a thermal spray coating provided on the surface of the substrate. The thermal spray coating is formed by thermal spraying, preferably plasma thermal spraying, the thermal spray powder.

Thermal spray powder, method for forming thermal spray coating, and plasma resistant member

A thermal spray powder contains particles composed of an oxide of any of the rare earth elements having an atomic number of 39 or from 59 to 70. The crushing strength of the particles is 80 MPa or greater. The ratio of bulk specific gravity to true specific gravity of the thermal spray powder is 0.15 or greater. The particles are preferably granulated and sintered particles. The average particle size of primary particles constituting the granulated and sintered particles is preferably 6 &#x3bc;m or less.

Thermal spray powder and method for forming thermal spray coating

A thermal spraying powder contains 30 to 50% by mass of chromium carbide with the remainder being an alloy containing chromium, aluminum, yttrium, and at least one of cobalt and nickel. The thermal spraying powder has an average particle size of 20 to 60 &#x3bc;m. The thermal spraying powder may contain 20% by mass or less of yttrium oxide in place of a part of the alloy. A thermal spray coating obtained by thermal spraying of the thermal spraying powder, particularly, a thermal spray coating obtained by high-velocity flame spraying of the thermal spraying powder is suitable for the purpose of a hearth roll.

Thermal spraying powder comprising chromium carbide and alloy containing cobalt or nickel, thermal spray coating, and hearth roll

Growing community of inventors

Tajimi, Japan

Isao Aoki