Patent ID: 7364806

Claim:
A thermal baffler coating system comprising a metal substrate, a metal bonding layer, and a ceramic thermal baffler layer formed on the surface of the metal substrate via the metal bonding layer by an electron beam physical vapor deposition method, wherein the ceramic thermal baffler layer contains 0.1 to 10 mol % of lanthanum oxide, and has a columnar structure of a stabilized zirconia containing a stabilizer, and the ceramic thermal barrier layer has a composition represented by the general formula: (Zr α )O 2 -β mol % (M 2 O 3 )-γ mol % (La 2 O 3 )(wherein M 2 O 3 is the stabilizer and M consists of at least one element selected from Y, Er, Gd, Yb, Ce, Nd, Pr and Sc, and α, β and γ are coefficients) and the coefficients α, β and γ satisfy the relationships: α=1, 3.1≦β≦15, and 0.1 ≦γ≦10.