Patent ID: 7462407
Filing Date: 2008-12-09
Classification: C23C,Y10T

Abstract:
1. A fluoride-containing coating containing an element selected from the group consisting of Sm, Eu, Gd, Tb, Dy, Ho, Er, Y, Tm, Yb and Lu and comprising a fluoride phase of the element which contains at least 50% of a crystalline phase of the orthorhombic system belonging to space group Pnma as a primary crystalline phase on the basis of the entire crystalline phase, the fluoride-containing coating being formed by a thermal spraying process comprising supplying a feed material in form of powder to gas or plasma gas stream, melting or softening the material and depositing droplets thereof on a substrate, and a heat treatment by holding the coating at a temperature in the range of 200 to 500° C. for at least 1 minute during or after the thermal spraying.