Patent ID: 6869703

Claim:
A thermal barrier coating for an underlying metal substrate which comprises a zirconia-containing ceramic composition having a c/a ratio of the zirconia lattice in the range of from about 1.0117 to about 1.0148 and stabilized in the tetragonal phase by a stabilizing amount of a stabilizer metal oxide other than solely yttria, the thermal barrier coating having: 1. a fraction of porosity of from about 0.10 to about 0.25; and 2. an impact and erosion resistance property defined by at least one of the following formulas: I =exp.[5.85−(144 ×s )−(3.68 ×p )]; (a) E=[ 187−(261 ×p )−(9989 ×s )]; (b) wherein s=1.0117−c/a ratio; p is the fraction of porosity; I is at least about 140 g/mil; and E is at least about 130 g/mil.