Titanium-based porous body and method for producing titanium-based porous body

Patent metadata

Field	Value
Publication number	US-11975388-B2
Application number	US-202118019709-A
Country	US
Kind code	B2
Filing date	Aug 17, 2021
Priority date	Sep 28, 2020
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

The titanium-based porous body according to the present invention is in a form of a sheet and contains titanium, and the titanium-based porous body has a thickness of 0.8 mm or less, a porosity of 30% to 65%, a maximum height Rz1 of one sheet surface of 30 μm or less, a ratio of a maximum height Rz2 of other sheet surface to the maximum height Rz1 of the one sheet surface (Rz2/Rz1) of 1.2 or more, and a compression deformation rate of 19% or less.

First claim

The invention claimed is:

1. A titanium-based porous body in a form of a sheet, the titanium-based porous body containing titanium,
wherein the titanium-based porous body has a thickness of 0.8 mm or less, a porosity of 30% to 65%, a maximum height Rz1 of one sheet surface of 30 μm or less, a ratio of a maximum height Rz2 of other sheet surface to the maximum height Rz1 of the one sheet surface (Rz2/Rz1) of 1.2 or more, and a compression deformation rate of 19% or less.

2. The titanium-based porous body according to claim 1 , wherein the compression deformation rate is 12% or less.

3. The titanium-based porous body according to claim 1 , wherein the titanium-based porous body has a titanium content of 75% by mass or more.

4. The titanium-based porous body according to claim 3 , wherein the titanium content is 98% by mass or more.

5. The titanium-based porous body according to claim 1 , wherein the compression deformation rate is 12% or less and wherein the titanium-based porous body has a titanium content of 75% by mass or more.

6. The titanium-based porous body according to claim 5 , wherein the titanium content is 98% by mass or more.

7. A method for producing a titanium-based porous body, the method comprising:
a raw material preparation step of preparing, as a raw material, a titanium-containing powder having a 10% particle diameter D10 of 30 μm or less and a 90% particle diameter D90 of 15 μm to 105 μm, and has a ratio (D90/D10) of the 90% particle diameter D90 to the 10% particle diameter D10 of 2.0 or more;
a powder depositing step of depositing the titanium-containing powder on a molding surface of a mold in a dry process; and
a powder sintering step of heating the titanium-containing powder on the molding surface to a temperature of 980° C. or more for 2 hours or more.

8. The method for producing a titanium-based porous body according to claim 7 , wherein a titanium-based porous body having a thickness of 0.8 mm or less is produced.

Assignees

• Toho Titanium Co Ltd

Inventors

• Inoue Yosuke
• Tsumagari Shougo

Classifications

• Y02E60/50

  Fuel cells · CPC title

• B22F2999/00

  Aspects linked to processes or compositions used in powder metallurgy · CPC title

• B22F2998/10

  Processes characterised by the sequence of their steps · CPC title

• B22F2301/205

  Titanium, zirconium or hafnium · CPC title

• B22F2304/10

  Micron size particles, i.e. above 1 micrometer up to 500 micrometer · CPC title