Patent ID: 8304098
Filing Date: 2012-11-06
Classification: C23C,Y10T

Abstract:
1. A hard-coated member having a hard coating having a compression stress and a thickness of 5 μm or more, said hard coating being made of a compound having a composition represented by (Me 1-a X a ) α (N 1-x-y C x O y ), wherein Me is at least one element selected from Groups 4a, 5a and 6a, X is at least one element selected from the group consisting of Al, Si, B and S, a, x and y are respectively the contents (atomic ratios) of X, C and O, and α is a ratio of (Me 1-a X a ) to (N 1-x-y C x O y ), meeting 0.1≦a≦0.65, 0≦x≦0.1, 0≦y≦0.1, and 0.85≦α≦1.25; compound crystal grains grown from (Me 1-a X a )-based droplets in the hard coating projecting from the hard coating surface; and a ratio L/T of the length L of said compound crystal grains to the thickness T of the coating meeting 0.1≦L/T≦1.2.