Rare-earth oxide thermal spray coated articles and powders for thermal spraying

• US 6,852,433 B2
• Filed: 07/15/2003
• Issued: 02/08/2005
• Est. Priority Date: 07/19/2002
• Status: Active Grant

• Current Assignee: Shin-Etsu Chemical Company Limited
• Original Assignee: Shin-Etsu Chemical Company Limited
• Inventors: Maeda, Takao
• Primary Examiner(s): MCNEIL, JENNIFER C
• Application Number:
  US10/618,679
• Publication Number:
  US 20040013911A1
• Time in Patent Office: 574 Days
• Field of Search: 428/469, 428/701, 428/702, 428/699, 428/698, 428/697, 106/474, 106/403, 106/479, 106/436
• US Class Current: 428/697
• CPC Class Codes: C04B 2235/3224 Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
• CPC Class Codes: C04B 2235/3225 Yttrium oxide or oxide-forming salts thereof
• CPC Class Codes: C04B 2235/3232 Titanium oxides or titanates, e.g. rutile or anatase
• CPC Class Codes: C04B 2235/3256 Molybdenum oxides, molybdates or oxide forming salts thereof, e.g. cadmium molybdate
• CPC Class Codes: C04B 2235/48 Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
• CPC Class Codes: C04B 2235/721 Carbon content
• CPC Class Codes: C04B 33/14 Colouring matters
• CPC Class Codes: C04B 33/30 Drying methods
• CPC Class Codes: C04B 35/00 Shaped ceramic products characterised by their composition porous ceramic products C04B38/00; ceramic articles characterised by particular shape, see the relevant classes, e.g. linings for casting ladles, tundishes, cups or the like B22D41/02; ceramic substrates for microelectronic semi-conductors H01L23/15; Ceramics compositions containing free metal bonded to carbides, diamond, oxides, borides, nitrides, silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides or sulfides other than as macroscopic reinforcing agents C22C; shaping of ceramics B28B; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products chemical preparation of powders of inorganic compounds C01; infiltration of sintered ceramic preforms with molten metal C04B41/51
• CPC Class Codes: C04B 35/50 based on rare-earth compounds non-oxide rare earth compounds C04B35/5156
• CPC Class Codes: C04B 35/505 based on yttrium oxide
• CPC Class Codes: C04B 35/52 based on carbon, e.g. graphite
• CPC Class Codes: C04B 35/6264 Mixing media, e.g. organic solvents
• CPC Class Codes: C04B 35/62655 Drying, e.g. freeze-drying, spray-drying, microwave or supercritical drying
• CPC Class Codes: C04B 35/6267 Pyrolysis, carbonisation or auto-combustion reactions
• CPC Class Codes: C04B 35/6268 characterised by the applied pressure or type of atmosphere, e.g. in vacuum, hydrogen or a specific oxygen pressure
• CPC Class Codes: C04B 41/009 characterised by the material treated
• CPC Class Codes: C04B 41/4527 Plasma spraying deposition from the gas phase using plasma C04B41/4533
• CPC Class Codes: C04B 41/5001 with carbon or carbonisable materials
• CPC Class Codes: C04B 41/5045 Rare-earth oxides
• CPC Class Codes: C04B 41/5133 : with a composition mainly composed of one or more of the refractory metals
• CPC Class Codes: C04B 41/87 : Ceramics
• CPC Class Codes: C23C 4/11 : Oxides

Abstract

A rare-earth oxide thermal spray coated article comprising a substrate and a coating layer formed by thermally spraying a rare-earth oxide thermal spraying powder onto a surface of the substrate, said coating layer being of a gray or black color having, in the L*a*b* color space, an L* value of up to 50, an a value of −3.0 to +3.0, and a b* value of −3.0 to +3.0.

Claims

1. A rare-earth oxide thermal spray coated article comprising:

a substrate and

a coating layer formed by thermally spraying a rare-earth oxide thermal spraying powder onto a surface of the substrate,

said coating layer being of a gray or black color having, in the L*a*b* color space, an L* value of up to 50, an a* value of −

3.0 to +3.0, and a b* value of −

3.0 to +3.0 and containing carbon or molybdenum.

2. A rare-earth oxide thermal spray coated article comprising:

a substrate and

a coating layer formed by thermally spraying a rare-earth oxide thermal spraying powder onto a surface of the substrate,

said coating layer being of a gray or black color having, in the L*a*b* color space, an L* value of up to 50, an a value of −

3.0 to +3.0, and a b* value of −

3.0 to +3.0

wherein the coating layer has a carbon content of 0.1 to 2% by weight or a titanium or molybdenum content of 1 to 1000 ppm.

3. A rare-earth oxide powder for thermal spraying, which powder is of a gray or black color having, in the L*a*b* color space, an L* value of up to 50, an a* value of −

3.0 to +3.0 and a b* value of −

3.0 to +3.0 and containing carbon or molybdenum.

4. A The rare-earth oxide powder for thermal spraying, which powder is of a gray or black color having, in the L*a*b* color space, an L* value of up to 50, an a* value of −

3.0 to +3.0 and a b* value of −

3.0 to +3.0,

wherein the powder has a carbon content of 0.1 to 2% by weight or a titanium or molybdenum content of 1 to 1000 ppm.

5. A rare-earth oxide powder for thermal spraying, which powder is of a gray or black color having, in the L*a*b* color space, an L* value of up to 50, an a* value of −

3.0 to +3.0 and a b* value of −

3.0 to +3.0,

wherein the powder has a carbon content of 0.1 to 2% by weight.

6. A rare-earth oxide powder for thermal spraying, which powder is of a gray or black color having, in the L*a*b* color space, an L* value of up to 50, an a value of −

3.0 to +3.0 and a b* value of −

3.0 to +3.0,

wherein the powder has a titanium content of 1 to 1000 ppm.

7. A rare-earth oxide powder for thermal spraying, which powder is of a gray or black color having, in the L*a*b* color space, an L* value of up to 50, an a* value of −

3.0 to +3.0 and a b* value of −

3.0 to +3.0,

wherein the powder has a molybdenum content of 1 to 1000 ppm.