Patent ID: 8021742
Filing Date: 2011-09-20
Classification: C23C,F01D,Y10T

Abstract:
1. A thermal barrier coating system comprising: a layer of bond coating disposed on a substrate surface; a first layer of ceramic insulating material disposed on the layer of bond coating; a second layer of ceramic insulating material disposed on the first layer of ceramic insulating material, the second layer of ceramic insulating material comprising one or more crack arrestors therein; and a third layer of ceramic insulating material disposed on the second layer of ceramic insulating material, the third layer configured as a sacrificial layer, and wherein the one or more crack arrestors in the second layer avoid propagation towards the first layer of one or more cracks that can form in the second layer, wherein a porosity value of the second layer of ceramic insulating material comprises a higher value than a porosity value of the first layer of ceramic insulating material, wherein the third layer of ceramic insulating material comprises a density value which is highest relative to respective density values of the first layer of ceramic insulating material and the second layer of ceramic insulating material, and further wherein the first layer comprises a thickness value, which is largest relative to respective thickness values of the second layer of ceramic insulating material and the third layer of ceramic insulating material.