Erosion resistant material and turbine blade
An erosion resistant material has a continuous portion and discontinuous portions. The continuous portion has a continuous structure. The discontinuous portions are arranged inside the continuous portion to have a discontinuous structure. The discontinuous portions are formed of particles having an average particle diameter of 1 μm or less. Further, the discontinuous portions are formed of a material having a surface hardness and a Young's modulus higher than those of the continuous portion.
1. An erosion resistant material, comprising: a continuous portion having a continuous structure, the continuous portion including a resin material containing a hydroxyl group, the resin material having a water droplet contact angle of 47 to 67 degrees on a surface thereof; and discontinuous portions arranged inside the continuous portion and being discontinuous with each other, the discontinuous portions including particles of core shell rubber and/or silicate, wherein the particles have a first average particle diameter of 1 μm or less, the resin material includes at least one of an epoxy resin, a phenol resin, a polyimide resin, and a polyester imide resin, the continuous portion has a Young's modulus of 1 GPa or more and 50 GPa or less, and the discontinuous portion has a Young's modulus of 0.1 MPa or more and 100 MPa or less.
2. The erosion resistant material according to claim 1 , wherein an average aspect ratio of the particles is 5 or more.
3. The erosion resistant material according to claim 1 , wherein a ratio of the discontinuous portions to the total of the continuous portion and the discontinuous portions is not less than 1 vol % nor more than 40 vol%.
4. The erosion resistant material according to claim 1 , further comprising fibers inside the continuous portion.
5. The erosion resistant material according to claim 4 , wherein the fibers include at least one of a glass fiber, a carbon fiber, and a polymer fiber.
6. The erosion resistant material according to claim 4 , wherein the ratio of the fibers to the total of the continuous portion, the discontinuous portions, and the fibers is not less than 1 vol % nor more than 40 vol %.
7. The erosion resistant material according to claim 1 , wherein the discontinuous portions include particles of core shell rubber and silicate.
8. The erosion resistant material according to claim 1 , wherein a ratio of the continuous portion to a total of the discontinuous portion and the discontinuous portion is 5 to 40 volume %.
9. The erosion resistant material according to claim 1 , wherein the resin material further includes at least one of an ester-acrylic monomer resin, an epoxy phenolic resin, an epoxy-acid anhydride-acrylic monomer resin, and an epoxy-ester-acrylic monomer resin.
10. A turbine blade, comprising:
a turbine blade body having a surface; and
a film on the surface, the film including the erosion resistant material according to claim 1 .