Abstract: A film-forming material of the present invention contains an oxyfluoride of yttrium represented by YOXFY (X and Y are numbers satisfying 0<X and X<Y) and YF3, wherein a ratio I2/I1 of a peak height I2 of the (020) plane of YF3 to a peak height I1 of the main peak of YOXFY as analyzed by XRD is from 0.005 to 100. It is preferable that a ratio I4/I1 of a peak height I4 of the main peak of Y2O3 to the peak height I1 of the main peak of YOXFY as analyzed by XRD is 0.01 or less.

Abstract: A material for cold spraying contains a powder of a compound of a rare earth element with a specific surface area of 30 m2/g or more as determined by a BET single-point method. The powder preferably has a volume of pores with a pore size of 3 to 20 nm of 0.08 cm3/g or more as determined by a gas absorption method. The powder also preferably has a crystallite diameter of 25 nm or less. The powder also preferably has a repose angle of from 10 to 60°. In the L*a*b* color system, the powder also preferably has a value L of 85 or more, a value a of from ?0.7 to 0.7, and a value b of from ?1 to 2.5.

Abstract: A coating material containing an oxyfluoride of yttrium and having a Fisher diameter of 1.0 to 10 ?m and a tap density TD to apparent density AD ratio, TD/AD, of 1.6 to 3.5. The coating material preferably has a pore volume of pores with a diameter of 100 ?m or smaller of 1.0 cm3/g or less as measured by mercury intrusion porosimetry. A coating containing an oxyfluoride of yttrium and having a Vickers hardness of 200 HV0.01 or higher. The coating preferably has a fracture toughness of 1.0×102 Pa·m1/2 or higher.

Abstract: A film-forming material of the present invention contains an oxyfluoride of yttrium represented by YOFY (X and Y are numbers satisfying 0<X and X<Y) and YF3, wherein a ratio I2/I1 of a peak height I2 of the (020) plane of YF3 to a peak height I1 of the main peak of YOXFY as analyzed by XRD is from 0.005 to 100. It is preferable that a ratio I4/I1 of a peak height I4 of the main peak of Y2O3 to the peak height I1 of the main peak of YOXFY as analyzed by XRD is 0.01 or less.

Abstract: A coating material containing an oxyfluoride of yttrium and having a Fisher diameter of 1.0 to 10 ?m and a tap density TD to apparent density AD ratio, TD/AD, of 1.6 to 3.5. The coating material preferably has a pore volume of pores with a diameter of 100 ?m or smaller of 1.0 cm3/g or less as measured by mercury intrusion porosimetry. A coating containing an oxyfluoride of yttrium and having a Vickers hardness of 200 HV0.01 or higher. The coating preferably has a fracture toughness of 1.0×102 Pa·m1/2 or higher.

Abstract: The present invention relates a coating powder comprising a rare earth oxyfluoride (Ln-O—F) and having: an average particle size (D50) of 0.1 to 10 ?m, a pore volume of pores having a diameter of 10 ?m or smaller of 0.1 to 0.5 cm3/g as measured by mercury intrusion porosimetry, and a ratio of the maximum peak intensity (S0) assigned to a rare earth oxide (LnxOy) in the 2? angle range of from 20° to 40° to the maximum peak intensity (S1) assigned to the rare earth oxyfluoride (Ln-O—F) in the same range, S0/S1, of 1.0 or smaller in powder X-ray diffractometry using Cu-K? rays or Cu-K?1 rays.

Abstract: A coating material containing an oxyfluoride of yttrium and having a Fisher diameter of 1.0 to 10 ?m and a tap density TD to apparent density AD ratio, TD/AD, of 1.6 to 3.5. The coating material preferably has a pore volume of pores with a diameter of 100 ?m or smaller of 1.0 cm3/g or less as measured by mercury intrusion porosimetry. A coating containing an oxyfluoride of yttrium and having a Vickers hardness of 200 HV0.01 or higher. The coating preferably has a fracture toughness of 1.0×102 Pa·m1/2 or higher.

Abstract: A sintered material is provided having a phase of a compound at least containing a rare earth element and fluorine, the sintered material having an L* value of 70 or more in the L*a*b* color space. The crystal grains of the sintered material preferably has an average grain size of 10 ?m or less. The sintered material preferably has a relative density of 95% or more. The sintered material preferably has a three-point flexural strength of 100 MPa or more. The sintered material preferably contains no oxygen, or preferably has an oxygen content of 13% by mass or less when containing oxygen. The compound is preferably rare earth element fluoride or oxyfluoride.

Abstract: A material for cold spraying contains a powder of a compound of a rare earth element with a specific surface area of 30 m2/g or more as determined by a BET single-point method. The powder preferably has a volume of pores with a pore size of 3 to 20 nm of 0.08 cm3/g or more as determined by a gas absorption method. The powder also preferably has a crystallite diameter of 25 nm or less. The powder also preferably has a repose angle of from 10 to 60°. In the L*a*b* color system, the powder also preferably has a value L of 85 or more, a value a of from ?0.7 to 0.7, and a value b of from ?1 to 2.5.

Abstract: A film-forming material of the present invention contains an oxyfluoride of yttrium represented by YOXFY (X and Y are numbers satisfying 0<X and X<Y) and YF3, wherein a ratio I2/I1 of a peak height I2 of the (020) plane of YF3 to a peak height I1 of the main peak of YOXFY as analyzed by XRD is from 0.005 to 100. It is preferable that a ratio I4/I1 of a peak height I4 of the main peak of Y2O3 to the peak height I1 of the main peak of YOXFY as analyzed by XRD is 0.01 or less.

Abstract: A film-forming material of the present invention contains an oxyfluoride of yttrium represented by YOXFY (X and Y are numbers satisfying 0<X and X<Y) and YF3, wherein a ratio I2/I1 of a peak height I2 of the (020) plane of YF3 to a peak height I1 of the main peak of YOXFY as analyzed by XRD is from 0.005 to 100. It is preferable that a ratio I4/I1 of a peak height I4 of the main peak of Y2O3 to the peak height I1 of the main peak of YOXFY as analyzed by XRD is 0.01 or less.

Abstract: The present invention relates a coating powder comprising a rare earth oxyfluoride (Ln-O—F) and having: an average particle size (D50) of 0.1 to 10 ?m, a pore volume of pores having a diameter of 10 ?m or smaller of 0.1 to 0.5 cm3/g as measured by mercury intrusion porosimetry, and a ratio of the maximum peak intensity (S0) assigned to a rare earth oxide (LnxOy) in the 2? angle range of from 20° to 40° to the maximum peak intensity (S1) assigned to the rare earth oxyfluoride (Ln-O—F) in the same range, S0/S1, of 1.0 or smaller in powder X-ray diffractometry using Cu-K? rays or Cu-K?1 rays.

Abstract: A coating material containing an oxyfluoride of yttrium and having a Fisher diameter of 1.0 to 10 ?m and a tap density TD to apparent density AD ratio, TD/AD, of 1.6 to 3.5. The coating material preferably has a pore volume of pores with a diameter of 100 ?m or smaller of 1.0 cm3/g or less as measured by mercury intrusion porosimetry. A coating containing an oxyfluoride of yttrium and having a Vickers hardness of 200 HV0.01 or higher. The coating preferably has a fracture toughness of 1.0×102 Pa·m1/2 or higher.

Abstract: The present invention is a sintering material including a granule, the sintering material having an apparent tap density of 1.0 to 2.5 g/cm3, a 50% cumulative volume particle diameter (D50N) of 10 to 100 ?m as measured before ultrasonication by laser diffraction/scattering particle size distribution analysis, a 50% cumulative volume particle diameter (D50D) of 0.1 to 1.5 ?m as measured after ultrasonication at 300 W for 15 minutes by laser diffraction/scattering particle size distribution analysis, and an X-ray diffraction pattern in which the maximum peak observed in the 2? angle range of from 20° to 40° is assigned to a rare earth oxyfluoride of the form LnOF when analyzed by X-ray diffractometry using Cu—K? or Cu—K?1 rays.

Abstract: A film-forming material of the present invention contains an oxyfluoride of yttrium represented by YOXFY (X and Y are numbers satisfying 0 <X and X <Y) and YF3, wherein a ratio I2/I1 of a peak height I2 of the (020) plane of YF3 to a peak height Ii of the main peak of YOXFY as analyzed by XRD is from 0.005 to 100. It is preferable that a ratio I4/I1 of a peak height I4 of the main peak of Y2O3 to the peak height I1 of the main peak of YOXFY as analyzed by XRD is 0.01 or less.

Abstract: The present invention is a sintering material including a granule, the sintering material having an apparent tap density of 1.0 to 2.5 g/cm3, a 50% cumulative volume particle diameter (D50N) of 10 to 100 ?m as measured before ultrasonication by laser diffraction/scattering particle size distribution analysis, a 50% cumulative volume particle diameter (D50D) of 0.1 to 1.5 ?m as measured after ultrasonication at 300 W for 15 minutes by laser diffraction/scattering particle size distribution analysis, and an X-ray diffraction pattern in which the maximum peak observed in the 20 angle range of from 20° to 40° is assigned to a rare earth oxyfluoride of the form LnOF when analyzed by X-ray diffractometry using Cu—K? or Cu—K?1 rays.

Abstract: The present invention relates a coating powder comprising a rare earth oxyfluoride (Ln-O—F) and having: an average particle size (D50) of 0.1 to 10 ?m, a pore volume of pores having a diameter of 10 ?m or smaller of 0.1 to 0.5 cm3/g as measured by mercury intrusion porosimetry, and a ratio of the maximum peak intensity (S0) assigned to a rare earth oxide (LnxOy) in the 2? angle range of from 20° to 40° to the maximum peak intensity (S1) assigned to the rare earth oxyfluoride (Ln-O—F) in the same range, S0/S1, of 1.0 or smaller in powder X-ray diffractometry using Cu-K? rays or Cu-K?1 rays.

Abstract: A thermal spray material comprising granules containing a rare earth oxyfluoride has a particle diameter of 1 to 150 ?m at a cumulative volume of 50 vol % before ultrasonic dispersion and 10 ?m or smaller after ultrasonic dispersion at 300 W for 15 minutes as determined by laser diffraction/scattering particle size distribution analysis. The particle diameter after ultrasonic dispersion is one-third or less of that before ultrasonic dispersion. The thermal spray material has an average aspect ratio of 2.0 or lower and a compressibility of 30% or less. When the granules further contain a rare earth fluoride, upon being analyzed by X-ray diffractometry using Cu-K? or Cu-K?1 radiation, S1/S2 is preferably ?0.10. S1=intensity of the maximum peak assigned to the rare earth oxyfluoride. S2=intensity of the maximum peak assigned to the rare earth fluoride, both observed in a 2? angle range of 20° to 40°.

Abstract: A thermal spray material includes granules of an oxyfluoride of yttrium (YOF). The granules may contain a fluoride of yttrium (YF3). The granules preferably have an oxygen content of 0.3 to 13.1 mass %. The granules preferably have a fracture strength of 0.3 MPa or more and less than 10 MPa. Part of yttrium (Y) of the granules may be displaced with at least one rare earth element (Ln) except yttrium, the molar fraction of Ln relative to the sum of Y and Ln being preferably 0.2 or less.

Abstract: A slurry for thermal spraying including particles containing a rare earth oxyfluoride and a dispersing medium. The particles have an average particle size of 0.01 to 10 ?m. The particles may further contain a rare earth fluoride. When the particles are analyzed by X-ray diffractometry using CuK? or CuK?1 radiation, a ratio of the maximum peak intensity (S0) of a rare earth oxide observed in a range of 2? angles of from 20° to 40° to the maximum peak intensity (S1) of the rare earth oxyfluoride observed in the same range, S0/S1, is preferably 0.10 or less.