Patent ID: 9551059
Date: 2017-01-24
CPC Classifications: C01F,C01P,C23C,Y10T

Claim:
1. A rare earth element fluoride sprayed article comprising a substrate and a sprayed coating which is deposited on the substrate by plasma spraying a spray powder comprising rare earth element fluoride particles having an aspect ratio of up to 2, an average particle size of 10 to 100 μm, a bulk density of 0.8 to 1.5 g/cm 3 , a carbon content of 0.1 to 0.5% by weight, and the total content of water and hydroxyl group of the rare earth element fluoride particles is up to 10,000 ppm, the sprayed coating having a carbon content of 0.03 to 0.1% by weight and an oxygen content of 0.3 to 0.8% by weight, and further having a L*a*b* color space chromaticity with a L* value of 65 to 85, an a* value of −3.0 to +3.0, and a b* value of 0.0 to +8.0.