Thermal spraying matertal

Patent metadata

Field	Value
Publication number	US-11359270-B2
Application number	US-201716333908-A
Country	US
Kind code	B2
Filing date	Sep 15, 2017
Priority date	Sep 16, 2016
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

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.

First claim

The invention claimed is:

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.

2. 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/cm 3 .

3. 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.

4. 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.

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

6. 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.

7. 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 cm 3 /g or less.

Assignees

• Fujimi Inc

Inventors

• Ibe Hiroyuki
• Tsuzuki Kazuyuki

Classifications

• C01P2006/11

  Powder tap density · CPC title

• C01P2004/03

  obtained by SEM · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01P2006/62

  L* (lightness axis) · CPC title

• C01P2004/84

  one phase coated with the other · CPC title