Metallic structure

Patent metadata

Field	Value
Publication number	US-10895006-B2
Application number	US-201615345863-A
Country	US
Kind code	B2
Filing date	Nov 8, 2016
Priority date	Nov 8, 2016
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

A metallic structure includes a first plurality of metal particles arranged in an amorphous structure; a second plurality of metal particles arranged in a crystalline structure having at least two grain sizes, wherein the crystalline structure is arranged to receive the amorphous structure deposited thereon; wherein the grain size is arranged in a gradient structure.

First claim

The invention claimed is:

1. A metal structure comprising:
a first plurality of metal particles arranged in an amorphous structure formed by a magnesium alloy;
a physically treated second plurality of metal particles arranged in a crystalline structure formed by a magnesium alloy and having at least two grain sizes, wherein the crystalline structure includes a receiving surface arranged to receive the amorphous structure deposited thereon; and
wherein the metal structure includes an increased yield strength of at least 24% over the same metal structure without the physically treated second plurality of metal particles.

2. The metal structure in accordance with claim 1 , wherein the grain size is arranged in a gradient structure.

3. The metal structure in accordance with claim 2 , wherein the grain sizes of the gradient structure decrease gradually from the center of the crystalline structure to the receiving surface of the crystalline structure.

4. The metal structure in accordance with claim 3 , wherein the gradient structure includes coarse crystal at the center of the crystalline structure.

5. The metal structure in accordance with claim 4 , wherein the gradient structure further includes a nanocrystalline surface at the receiving surface of the crystalline structure.

6. The metal structure in accordance with claim 5 , wherein the grain of the nanocrystalline surface includes a size smaller than or equal to 1 μm.

7. The metal structure in accordance with claim 1 , wherein the amorphous structure forms a metallic glass film.

8. The metal structure in accordance with claim 1 , wherein, the receiving surface of the crystalline structure of the physically treated second plurality of metal particles includes only minor surface indentation and non-substantial cracking about the surface indentation, as compared to the receiving surface of the same crystalline structure without the physically treated second plurality of metal particles.

9. The metal structure in accordance with claim 8 , wherein the minor surface indentation and non-substantial cracking are significantly reduced by the high diffusion factor of the crystalline structure.

10. The metal structure in accordance with claim 1 , wherein the grain sizes of the amorphous structure and the crystalline structure form a multilayer gradient structure, with the grain sizes being decreased gradually from the center of the crystalline structure to the amorphous structure.

11. The metal structure in accordance with claim 1 , wherein the metal structure includes an increased ultimate tensile strength of at least 13% over the same metal structure without the physically treated second plurality of metal particles.

12. The metal structure in accordance with claim 1 , wherein the metal structure includes an increased wear resistance of at least 65% over the same metal structure without the physically treated second plurality of metal particles.

13. The metal structure in accordance with claim 1 , wherein the metal structure includes an increased corrosive resistance at least 5 times of the same metal structure without the physically treated second plurality of metal particles.

14. The metal structure in accordance with claim 1 , wherein the metal structure includes an increased hardness of at least 60% over the same metal structure without the physically treated second plurality of metal particles.

15. The metal structure in accordance with claim 14 , wherein the metal structure includes a hardness of at least 3.02 GPa.

Assignees

• Univ City Hong Kong

Inventors

• Lu Jian
• Wu Ge

Classifications

• C22C1/11

  Making amorphous alloys · CPC title

• C23C28/028

  Including graded layers in composition or in physical properties, e.g. density, porosity, grain size · CPC title

• Y10T428/12993

  Surface feature [e.g., rough, mirror] · CPC title

• C23C30/00

  Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process (C23C26/00, C23C28/00 take precedence) · CPC title

• C23C28/021

  including at least one metal alloy layer · CPC title