# US 11,299,800 B2 · Thermal spraying matertal

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- Number: US 11,299,800 B2
- Document ID: US11299800B2
- Status: Granted
- Kind: B2
- Application number: 16/333,908
- Filed: 2017-09-15
- Published: 2019-07-04
- Granted: 2022-04-12
- Earliest claimed: 2016-09-16
- Assignees: Fujimi Incorporated
- Applicants: Fujimi Incorporated
- Inventors: Hiroyuki Ibe; Kazuyuki Tsuzuki
- Web page: https://patentgrep.com/patent/US11299800B2

## CPC

- C23C 4/04: characterised by the coating material
- C01F 17/265: Fluorides
- C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram
- C01P 2004/03: obtained by SEM
- C01P 2004/32: Spheres
- C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer
- C01P 2004/84: one phase coated with the other
- C01P 2006/11: Powder tap density
- C01P 2006/14: Pore volume
- C01P 2006/21: Attrition-index or crushing strength of granulates
- C01P 2006/62: L* (lightness axis)
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- C01F: COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts of peroxyacids C01B15/00; sulfides or polysulfides of magnesium, calcium, strontium, or barium C01B17/42; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds other than ammonia or cyanogen containing nitrogen and non-metals and optionally metals C01B21/082; amides or imides of silicon C01B21/087}; metal {imides or} amides C01B21/092, {C01B21/0923}; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanic acid C01C3/14; salts of cyanamide C01C3/16; thiocyanates C01C3/20; {double sulfates of magnesium with sodium or potassium C01D5/12; with other alkali metals C01D15/00, C01D17/00})
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

## Abstract

Provided is a thermal spraying material capable of forming a thermally sprayed coating film having improved plasma erosion resistance. The invention disclosed here provides a thermal spraying material. This thermal spraying material comprises composite particles in which a plurality of yttrium fluoride microparticles are integrated. In addition, the compressive strength of the composite particles is 5 MPa or more.

## Claims

### Claim 1

A thermal spraying material comprising:
granulated sintered composite particles in which a plurality of sintered yttrium fluoride microparticles are integrated with each other directly,
wherein the granulated sintered composite particles have a compressive strength of 5 MPa or more.

### Claim 2 (depends on 1)

The thermal spraying material according to claim 1, wherein the thermal spraying material is a powder comprising a plurality of the composite particles, and the powder has a bulk density of 1 to 1.7 g/cm3.

### Claim 3 (depends on 1)

The thermal spraying material according to claim 1, wherein the thermal spraying material is a powder comprising a plurality of the composite particles, and the powder has an average particle diameter of 10 to 100 μm.

### Claim 4 (depends on 1)

The thermal spraying material according to claim 1, wherein no diffraction peak attributable to yttrium oxide is detected in X-Ray diffraction analysis of the powder.

### Claim 5 (depends on 1)

The thermal spraying material according to claim 1, wherein a bulk reduction R (%), as calculated on the basis of the following formula: R=(DT−DB)/DT×100; is 30 or more, wherein DT is a tap density of the powder and DB is a bulk density of the powder.

### Claim 6 (depends on 1)

The thermal spraying material according to claim 1, wherein in an electron microscope observation of the composite particles, 40% by number or more of the yttrium fluoride microparticles are bound to and integrated with each other.

### Claim 7 (depends on 1)

The thermal spraying material according to claim 1, wherein a cumulative pore volume of pores having a pore diameter of 1 μm or less, as determined by means of mercury intrusion porosimetry, is 0.2 cm3/g or less.