Powder material for powder additive manufacturing and powder additive manufacturing method using same

Patent metadata

Field	Value
Publication number	US-2017189960-A1
Application number	US-201515320034-A
Country	US
Kind code	A1
Filing date	Jun 22, 2015
Priority date	Jun 20, 2014
Publication date	Jul 6, 2017
Grant date	—

Abstract

[Problem] To provide a powder material that has good fluidity and is used for powder additive manufacturing.
[Solution] The powder material of this invention is used in powder additive manufacturing. The powder material is formed of particles having a form of secondary particles that are formed with primary particles bound three-dimensionally with interspaces. The secondary particles forming the powder material preferably have an average particle diameter of 1 μm or larger, but 100 μm or smaller. The secondary particles forming the powder material are preferably granulated particles. The powder additive manufacturing method of this invention is carried out, using the powder material.

First claim

1 . A powder material for powder additive manufacturing comprising:
particles having a form of secondary particles, the secondary particles formed with primary particle bound three-dimensionally with interspaces.

2 . The powder material according to claim 1 , wherein the secondary particles have an average particle diameter of 1 μm or larger and 100 μm or smaller.

3 . The powder material according to claim 1 , wherein the secondary particles are granulated particles obtainable by spherical granulation of the primary particles.

4 . The powder material according to claim 1 , wherein the secondary particles are granulated sintered particles obtainable by spherical granulation and sintering of the primary particles.

5 . The powder material according to claim 1 , wherein the primary particles have an average particle diameter of 1 nm or larger, but 10 nm or smaller.

6 . The powder material according to claim 1 , wherein
the secondary particles are formed of core particles being the first primary particles and microparticles being the second primary particles, with the core particles bearing the microparticles on their surfaces, the core particles have an average particle diameter of 1 μm or larger, but 100 μm or smaller, and the microparticles have an average particle diameter of 1 nm or larger, but smaller than 1000 nm.

7 . The powder material according to claim 6 , comprising the microparticles at 100 ppm or greater, but 5000 ppm or less by mass.

8 . The powder material according to claim 1 formed of at least one species of material selected from the group consisting of metal materials, ceramic materials and cermets.

9 . A three-dimensional object obtained by powder additive manufacturing using the powder material according to claim 1 .

10 . A powder additive manufacturing method using the powder material according to claim 1 .

11 . A method for producing a three-dimensional object, using the powder additive manufacturing method according to claim 10 .

Assignees

• Fujimi Inc

Inventors

• Ibe Hiroyuki

Classifications

• B29B9/12

  characterised by structure or composition · CPC title

• B29B9/16

  Auxiliary treatment of granules · CPC title

• B29C64/153

  using layers of powder being selectively joined, e.g. by selective laser sintering or melting · CPC title

• B22F1/148

  Agglomerating · CPC title

• B22F9/026 Primary

  Spray drying of solutions or suspensions · CPC title