Patent ID: 7947381

Claim:
A moving blade or impeller for a rotating machine, the moving blade or impeller comprising: a nitrided layer formed on a surface of the moving blade or impeller by a radical nitridation treatment to improve fatigue strength; a plated film deposited on the nitrided layer for preventing particulates contained in a gas that comes into contact with the plated film as the rotating machine rotates from adhering to the plated film, wherein the plated film includes a plated matrix made of nickel or a nickel-based metal, and fluorocarbon polymer particles, wherein the fluorocarbon polymer particles are contained in the plated matrix and at least some of the fluorocarbon polymer particles are exposed at a surface of the plated matrix, and wherein a ratio of the exposed fluorocarbon polymer particles on the surface of the plated matrix to the occupied area of the surface of the plated film is 10% to 40%.