Yttrium-aluminum double oxide thermal spraying powder
AssigneeFujimi Incorporated
InventorsJunya Kitamura, Hiroaki Mizuno, Tsuyoshi Itsukaichi
Life of this patent
Estimating the term…
Abstract
A thermal spraying powder contains granulated and sintered particles of an yttrium-aluminum double oxide formed by granulating and sintering raw-material particles. The crushing strength of the granulated and sintered particles is 15 MPa or more, and 10% particle size of the granulated and sintered particles is 6 μm or more. The thermal spraying powder is suitable for use in forming a thermal spray coating through plasma spraying.
Claims10
A thermal spraying powder comprising granulated and sintered particles of an yttrium-aluminum double oxide formed by granulating and sintering raw-material particles, wherein the crushing strength of the granulated and sintered particles is 86 MPa or more, and 10% particle size D10 of the granulated and sintered particles is 6 μm or more, and wherein, when x-ray diffraction of the thermal spraying powder is measured, the ratio of the intensity of an x-ray diffraction peak of a (222) plane of yttria to the intensity of the maximum peak among an x-ray diffraction peak of a (420) plane of a garnet phase of the yttrium-aluminum double oxide, an x-ray diffraction peak of a (420) plane of a perovskite phase of the yttrium-aluminum double oxide, and an x-ray diffraction peak of a (122) plane of a monoclinic phase of the yttrium-aluminum double oxide is 20% or less.
A thermal spraying method comprising plasma spraying a thermal spraying powder containing granulated and sintered particles of an yttrium-aluminum double oxide formed by granulating and sintering raw-material particles, wherein the crushing strength of the granulated and sintered particles is 86 MPa or more, and 10% particle size D10 of the granulated and sintered particles is 6 μm or more, and wherein, when x-ray diffraction of the thermal spraying powder is measured, the ratio of the intensity of an x-ray diffraction peak of a (222) plane of yttria to the intensity of the maximum peak among an x-ray diffraction peak of a (420) plane of a garnet phase of the yttrium-aluminum double oxide, an x-ray diffraction peak of a (420) plane of a perovskite phase of the yttrium-aluminum double oxide, and an x-ray diffraction peak of a (122) plane of a monoclinic phase of the yttrium-aluminum double oxide is 20% or less.
A method for forming a thermal spray coating, the method comprising plasma spraying a thermal spraying powder to form the thermal spray coating, wherein the thermal spraying powder contains granulated and sintered particles of an yttrium-aluminum double oxide formed by granulating and sintering raw-material particles, and wherein the crushing strength of the granulated and sintered particles is 86 MPa or more, and 10% particle size D10 of the granulated and sintered particles is 6 μm or more, and wherein, when x-ray diffraction of the thermal spraying powder is measured, the ratio of the intensity of an x-ray diffraction peak of a (222) plane of yttria to the intensity of the maximum peak among an x-ray diffraction peak of a (420) plane of a garnet phase of the yttrium-aluminum double oxide, an x-ray diffraction peak of a (420) plane of a perovskite phase of the yttrium-aluminum double oxide, and an x-ray diffraction peak of a (122) plane of a monoclinic phase of the yttrium-aluminum double oxide is 20% or less.
Dependencies are inferred from the claim text.