Metal-based structure or nanoparticles containing hydrogen, and method for producing same

Patent metadata

Field	Value
Publication number	US-10125019-B2
Application number	US-201415104571-A
Country	US
Kind code	B2
Filing date	Dec 12, 2014
Priority date	Dec 18, 2013
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

To provide a metal-based structure or nanoparticles whose homogeneity is not deteriorated and whose sticking formation is easy, and a production method thereof with a high safety. A metal-based structure comprises a hydrogen compound, cluster, or an aggregate thereof, represented by the general formula: MmH. The M is a metal-based atom. The m is an integer of 3 or more and 300 or less. H is a hydrogen atom.

First claim

The invention claimed is:

1. A metal-based structure comprising: a metal element d hydrogen,
wherein the metal element comprises a single element,
wherein the single element is iron,
wherein at least a part of the hydrogen are non-diffusible hydrogen contained in the metal-based structure after the metal-based structure is heated at 200° C. for 2 minutes; and
a content of the non-diffusible hydrogen is 0.01% by mass or more, or 0.41% by atom or more, based on the whole amount of the metal-based structure.

2. The metal-based structure according to claim 1 ,
wherein the metal-based structure comprises a metal-based amorphous phase at least in part,
wherein the metal-based amorphous phase comprises the metal element and the hydrogen, and
wherein the metal-based amorphous phase is amorphized by containing the hydrogen.

3. The metal-based structure according to claim 1 , wherein the metal-based structure comprises a hydrogen compound, a cluster, or an aggregate thereof, represented by the general formula: M m H, wherein
M is an iron atom:
m is an integer of 3 or more and 300 or less; and
H is a hydrogen atom.

4. The metal-based structure according to claim 3 , wherein m is 4, 6, 8, 12, 20, or 30.

5. The metal-based structure according to claim 2 , wherein the metal-based structure comprises a hydrogen compound, a cluster, or an aggregate thereof, represented by the general formula: M m H, wherein
M is an iron atom;
m is an integer of 3 or more and 300 or less; and
H is a hydrogen atom.

6. The metal-based structure according to claim 5 , wherein m is 4, 6, 8, 12, 20, or 30.

7. The metal-based structure according to claim 1 , wherein a content A of the hydrogen, % by atom, is a value satisfying the following formulae (1) and (2), based on the whole amount of the metal-based structure
Y= 100×1/( X+ 1) wherein X= 4,6,8,12,20, or 30  (1)

0.85 Y≤A≤ 1.15 Y   (2).

8. The metal-based structure according to claim 2 , wherein a content A of the hydrogen, % by atom, is a value satisfying the following formulae (1) and (2), based on the whole amount of the metal-based structure
Y= 100×1/( X+ 1) wherein X= 4,6,8,12,20, or 30  (1)

0.85 Y≤A≤ 1.15 Y   (2).

9. The metal-based structure according to claim 1 , wherein a content of the hydrogen is 0.095% by mass or more, or 5.04% by atom or more, based on the whole amount of the structure.

10. The metal-based structure according to claim 1 , wherein the metal-based structure comprises an amorphous phase at least in part.

11. The metal-based structure according to claim 10 , wherein the amorphous phase contains hydrogen.

12. The metal-based structure according to claim 1 , wherein the hydrogen content is 0.037% by mass or more and 0.59% by mass or less, or 2.0% by atom or more and 25% by atom or less, based on the whole amount of the metal-based structure.

13. The metal-based structure according to claim 1 , wherein at least a part of the metal-based structure comprises a particle structure or a wire-shaped structure.

14. The metal-based structure according to claim 10 , wherein the metal-based structure comprises a formless amorphous phase, which fills up a cavity in the metal-based structure, or consists of the formless amorphous phase.

15. The metal-based structure according to claim 13 , wherein the pa structure or the wire-shaped structure is formed by a self-granulating reaction.

16. The metal-based structure according to claim 1 ,
wherein the metal-based structure comprises a hydrogen compound, a cluster, or an aggregate thereof, which comprises a regular polyhedron structure or an almost regular polyhedron structure,
wherein a hydrogen atom is disposed at the center of the regular polyhedron structure or the almost regular polyhedron structure, and
wherein a metal atom is disposed on each vertex of the regular polyhedron structure or the almost regular polyhedron structure, on the middle of each surface of the regular polyhedron structure or the almost regular polyhedron structure, or on the middle of each side of the regular polyhedron structure or the almost regular polyhedron structure.

17. A metal-based structure,
wherein the metal-based structure is a metal-based structure bound body that is bound to the metal-based structure according to claim 1 , and
wherein the metal-based structure bound body has a shape anisotropy.

18. The metal-based structure according to claim 1 , wherein the metal-based structure is used for a 3D printer.

19. A method for producing the metal-based structure according to claim 1 , the method comprising controlling at least one of the following (i) to (iii) by controlling a hydrogen content based on the whole amount of the metal-based structure, the hydrogen being contained in the metal-based structure:
(i) controlling formation of an amorphous phase which the metal-based structure comprises;
(ii) controlling a particle shape of the metal-based structure; and
(iii) controlling a composition of the metal-based structure,
wherein the metal-based structure is a structure obtained by reducing a reducible substance in liquid, and
wherein the reducible substance is a substance containing a metal-based reducible component containing at least one metal element and/or semi-metal element.

20. The method for producing the metal-based structure according to claim 19 , wherein
the hydrogen content is controlled to 0.41% by atom or more, thereby to form the metal-based structure comprising a metal-based amorphous phase, or
the hydrogen content is controlled to 2.0% by atom or more, thereby to form the metal-based structure comprising a metal-based amorphous phase, wherein the metal-based amorphous phase comprises the metal element and the hydrogen, or
the hydrogen content is controlled to 3.3% by atom or more, thereby to form the metal-based structure substantially comprising a metal-based amorphous phase alone, wherein the metal-based amorphous phase comprises the metal element and the hydrogen, or
the hydrogen content is controlled to 5.5% by atom or more, thereby to form the metal-based structure substantially comprising a metal-based amorphous phase alone, wherein the metal-based amorphous phase comprises the metal element and the hydrogen and at least a part of the metal-based amorphous phase is formless.

21. A method for producing the metal-based structure according to claim 1 , wherein the metal-based structure comprises a hydrogen compound, a cluster, or an aggregate thereof, represented by the general formula: MmH wherein
M is an iron atom;
m is an integer of 3 or more and 300 or less; and
H is a hydrogen atom,
the method comprising:
controlling m to 31 or more, thereby to form the metal-based structure comprising a metal-based amorphous phase, or
controlling m to 30 or less, thereby to form the metal-based structure comprising a metal-based amorphous phase, wherein the metal-based amorphous phase comprises the metal element and the hydrogen, or
controlling m to 20 or less, thereby to form the metal-based structure substantially comprising a metal-based amorphous phase alone, wherein the metal-based amorphous phase comprises the metal element and the hydrogen, or
controlling m to 12 or less, thereby to form the metal-based structure substantially comprising a metal-based amorphous phase alone, wherein the metal-based amorphous phase comprises the metal element and the hydrogen and at least a part of the metal-based amorphous phase is formless.

Assignees

• Public Univ Corp Yokohama City Univ
• Taguchi Kohei
• Kohei Taguchi

Inventors

• Taguchi Kohei
• Shinozaki Kazuteru
• Takayasu Satoshi

Classifications

• B22F1/08

  Metallic powder characterised by particles having an amorphous microstructure · CPC title

• B22F1/148

  Agglomerating · CPC title

• B22F9/26 Primary

  using gaseous reductors · CPC title

• B01J37/16

  Reducing · CPC title

• C01P2006/42

  Magnetic properties · CPC title