Thermal barrier coating film, turbine member, and thermal barrier coating method
A thermal barrier coating film includes a bond coat layer that is a metallic bond layer formed on a base material; a topcoat layer that is a ceramic-containing layer formed on the bond coat layer; and at least one of a protective layer and a protective substance. The protective layer is formed on the topcoat layer and mainly contains SrSO 4 . The protective substance is provided in a plurality of void spaces included in the topcoat layer and mainly contains SrSO 4 .
1. A thermal barrier coating film comprising:
a bond coat layer that is a metallic bond layer formed on a base material;
a topcoat layer that is a ceramic-containing layer formed on the bond coat layer; and
at least one of a protective layer formed on the topcoat layer and mainly containing SrSO 4 and a protective substance provided in the interior of a plurality of void spaces included in the topcoat layer, the protective substance mainly containing SrSO 4 .
2. The thermal barrier coating film according to claim 1 , wherein the thermal barrier coating film includes the protective substance out of the protective layer and the protective substance.
3. The thermal barrier coating film according to claim 2 , wherein the topcoat layer is a dense vertically cracked coat layer and has the protective substance in the interior of cracks in the dense vertically cracked coat layer.
4. A turbine member comprising the thermal barrier coating film according to claim 1 on a surface thereof.
5. A thermal barrier coating method for producing the thermal barrier coating film according to claim 1 , comprising:
forming, on a base material, a bond coat layer that is a metallic bond layer;
forming, on the bond coat layer, a topcoat layer that is a ceramic-containing layer; and
forming, on the topcoat layer, a protective layer that mainly contains SrSO 4 .
6. A thermal barrier coating method for producing the thermal barrier coating film according to claim 1 , comprising:
forming, on a base material, a bond coat layer that is a metallic bond layer;
forming, on the bond coat layer, a topcoat layer that is a ceramic-containing layer having a plurality of void spaces; and
injecting, in the interior of the void spaces in the topcoat layer, a protective substance that mainly contains SrSO 4 .
7. The thermal barrier coating film according to claim 1 , wherein the thermal barrier coating film includes the protective layer out of the protective layer and the protective substance.
8. The thermal barrier coating film according to claim 7 , wherein the topcoat layer has a plurality of void spaces.
9. The thermal barrier coating film according to claim 8 , wherein the topcoat layer is a dense vertically cracked coat layer.
10. The thermal barrier coating film according to claim 7 , wherein the protective layer has a porosity of 0.1% to 5%.