Patent ID: 11946147
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C  B  F | IPC B  C  F

Claim 0:
1. A thermal barrier coating comprising:
a bond coat layer deposited on a substrate; and
a ceramic layer deposited on the bond coat layer,
the ceramic layer including
a first layer having a porosity of 10% or more and 15% or less, and
a second layer having a porosity of 0.5% or more and less than 9.0%, and having a thickness of 50 μm or more and 100 μm or less, the second layer being deposited on the first layer,

wherein a thickness of the second layer is 10% or more and 100% or less of a thickness of the first layer,
wherein the first layer and the second layer are each composed of ytterbium-stabilized zirconia (“YbSZ”),
wherein the second layer is formed by thermally spraying first spray particles having a particle size distribution with a D10 particle size of 30 μm or more and 40 μm or less, a D50 particle size of 40 μm or more and 60 μm or less, and a D90 particle size of 70 μm or more and 80 μm or less,
wherein the first layer is formed by thermally spraying second spray particles having a particle size distribution with a D10 particle size of 40 μm or more and 50 μm or less, a D50 particle size of 60 μm or more and 70 μm or less, and a D90 particle size of 80 μm or more and 100 μm or less, and
wherein a ratio of the D10 particle size of the first spray particles to the D10 particle size of the second spray particles is larger than a ratio of the D50 particle size of the first spray particles to the D50 particle size of the second spray particles and a ratio of the D90 particle size of the first spray particles to the D90 particle size of the second spray particles.