Patent ID: 7862911
Filing Date: 2011-01-04
Classification: C23C,Y10T

Abstract:
1. A thermal spray coating made of cermet containing boron, molybdenum, chromium, and cobalt on a surface of a base member, wherein a value gained by dividing, by a coefficient of thermal expansion of the base member, a value that is gained by dividing a coefficient of thermal expansion of the thermal spray coating by a thickness of the thermal spray coating (unit: μm) is no less than 0.15×10 −2 , wherein a formula: t−23e 0.3P ≧0 (where, 0<P≦4) is satisfied when a porosity of the thermal spray coating is defined as P (unit: %) and the thickness of the thermal spray coating is defined as t (unit: μm), and the average particle size of the cermet is between 5 to 50 μm.