Erosion resistant material and turbine blade

Patent metadata

Field	Value
Publication number	US-10082035-B2
Application number	US-201615052003-A
Country	US
Kind code	B2
Filing date	Feb 24, 2016
Priority date	Aug 30, 2013
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

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.

First claim

What is claimed is:

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 .

Assignees

• Toshiba Kk

Inventors

• Okamoto Tetsushi
• Sawa Fumio
• Harakawa Takashi
• Yamazaki Kenichi
• Cho Hiroaki
• Shibukawa Naoki
• Hashidate Tadayuki
• Hyodo Yoshihiro
• Tanaka Akira
• Sakuma Masamitsu

Classifications

• F05D2300/614

  Fibres or filaments · CPC title

• B22F7/02

  of composite layers {(B22F7/002 takes precedence)} · CPC title

• F05D2300/13

  Refractory metals, i.e. Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W · CPC title

• F05D2300/211

  Silica · CPC title

• C08K3/013

  Fillers, pigments or reinforcing additives · CPC title