A nanocomposite having titanium aluminum carbon nitride and amorphous
carbon is disclosed, and the nanocomposite comprises a titanium aluminum
carbon nitride grain of nanometer scale and an amorphous carbon matrix,
wherein the titanium aluminum carbon nitride grain of nanometer scale is
embedded into the amorphous carbon matrix. The method for coating the
nanocomposite of titanium aluminum carbon nitride-amorphous carbon on a
substrate comprises: depositing the substrate in a reaction chamber; and
igniting plasma to clean and remove an oxide layer and adsorptive on the
substrate; injecting a reaction gas. The reaction gas is activated and
thermal decomposed by plasma to form the nanocomposite coating layer of
titanium aluminum carbon nitride-amorphous carbon on the surface of the
substrate.
