METHOD OF SURFACE TREATMENT FOR METAL GLASS PART, AND METAL GLASS PART WITH ITS SURFACE TREATED BY THE METHOD

• US 20100089761A1
• Filed: 03/13/2007
• Published: 04/15/2010
• Est. Priority Date: 03/13/2007
• Status: Active Grant

• Current Assignee: NGK Insulators Limited, Tohoku University National Universities Corporation
• Original Assignee: Eyetec Co., Ltd., Makabe R&D Co., Ltd., NGK Insulators Limited, Tohoku University National Universities Corporation
• Inventors: Suzuki, Hiroshi, Muramatsu, Naokuni, Makabe, Eiichi, Kiuchi, Junsuke, Arakawa, Tatsue, Wang, Xin Min, Inoue, Akihisa, Kimura, Hisamichi
• Granted Patent: US 9,175,406 B2
• Time in Patent Office: Days
• US Class Current: 205/194
• CPC Class Codes: C23C 18/165 Multilayered product layered product B32B
• CPC Class Codes: C23C 18/1844 with use of organic or inorganic compounds other than metals, first
• CPC Class Codes: C23C 18/31 Coating with metals
• CPC Class Codes: C23G 1/02 with acid solutions
• CPC Class Codes: C23G 1/086 solutions containing HF
• CPC Class Codes: C23G 1/10 Other heavy metals
• CPC Class Codes: C23G 1/103 copper or alloys of copper
• CPC Class Codes: C23G 1/106 refractory metals
• CPC Class Codes: C25D 5/34 Pretreatment of metallic surfaces to be electroplated
• CPC Class Codes: C25D 5/36 of iron or steel
• CPC Class Codes: C25D 5/38 of refractory metals or nickel
• CPC Class Codes: C25D 5/40 Nickel; Chromium
• CPC Class Codes: C25D 5/48 After-treatment of electroplated surfaces

Abstract

There is provided a metallic glass component with its surface layer having both durability of a film and chromatic color properties, and a method for forming the surface layer. Surface active treatment is performed wherein the surface of the metallic glass component is reacted with a mixed aqueous solution of nitric acid and hydrofluoric acid to remove an oxide film and to provide an anchor bond shape on the surface of a metallic glass component, and electroplating or electroless plating is then performed, to form a plating film on the surface of the metallic glass component. It is thereby possible to form a surface layer of a metallic glass which has both durability and a chromatic color.

Claims

1. A surface treatment method for a metallic glass component, comprising:

removing an oxide film on a surface of the metallic glass component and providing an anchor bond shape on the surface of the metallic glass component by surface active treatment with a mixed aqueous solution of nitric acid and hydrofluoric acid; and

forming a plating film on the surface of the metallic glass component by electroplating or electroless plating.

3. The surface treatment method for a metallic glass component according to claim 1, further comprising:

adjusting a surface roughness by physical polishing between the surface active treatment and the electroplating, or the electroless plating.

4. The surface treatment method for a metallic glass component according to claim 1, further comprising:

forming a transparent resin coat by applying transparent resin after the electroplating, or the electroless plating.

6. The surface treatment method for a metallic glass component according to claim 4, wherein,

the transparent resin coat or the resin coat has a thickness of not less than 1 μ

m and not more than 10 μ

m.

7. The surface treatment method for a metallic glass component according to claim 1, wherein,

a volumetric ratio of the nitric acid to the hydrofluoric acid is in a range of 2 to 5, and the mixed aqueous solution of nitric acid and hydrofluoric acid has a concentration of 1 to 10% in a volumetric ratio.

8. The surface treatment method for a metallic glass component according to claim 1, wherein,

the metallic glass component is Zr based, Ti based, Cu based, Ni based or Fe based.

9. A metallic glass component, wherein the surface thereof is treated by claim 1.

12. The surface treatment method for a metallic glass component according to claim 3, further comprising:

forming a transparent resin coat by applying transparent resin after the electroplating or the electroless plating.

15. The surface treatment method for a metallic glass component according to 12, wherein,

the transparent resin coat has a thickness of not less than 1 μ

m and not more than 10 μ

m.

2. A surface treatment method for a metallic glass component, comprising:

removing an oxide film on a surface of the metallic glass component and providing an anchor bond shape on the surface of the metallic glass component by surface active treatment with a mixed aqueous solution of nitric acid and hydrofluoric acid; and

forming a metal deposition film uniformly on the surface of the metallic glass component by a dry plating method such as vacuum deposition, ion plating or sputtering.

10. The surface treatment method for a metallic glass component according to claim 2, further comprising:

adjusting a surface roughness by physical polishing between the surface active treatment and the dry plating method.

11. The surface treatment method for a metallic glass component according to claim 2, further comprising:

forming a transparent resin coat by applying transparent resin after the dry plating method.

13. The surface treatment method for a metallic glass component according to claim 10, further comprising:

forming a transparent resin coat by applying transparent resin after the dry plating method.

14. The surface treatment method for a metallic glass component according to 11, wherein,

the transparent resin coat has a thickness of not less than 1 μ

m and not more than 10 μ

m.

16. The surface treatment method for a metallic glass component according to 13, wherein,

the transparent resin coat has a thickness of not less than 1 μ

m and not more than 10 μ

m.

18. The surface treatment method for a metallic glass component according to claim 2, wherein,

a volumetric ratio of the nitric acid to the hydrofluoric acid is in a range of 2 to 5, and the mixed aqueous solution of nitric acid and hydrofluoric acid has a concentration of 1 to 10% in a volumetric ratio.

5. A surface treatment method for a metallic glass component, comprising:

removing an oxide film on a surface of the metallic glass component and providing an anchor bond shape on the surface of the metallic glass component by surface active treatment with a mixed aqueous solution of nitric acid and hydrofluoric acid;

adding a metal gloss color to the surface of the metallic glass component by physical polishing;

forming a resin coat to the surface of the metallic glass component by applying resin.

17. The surface treatment method for a metallic glass component according to 5, wherein,

the resin coat has a thickness of not less than 1 μ

m and not more than 10 μ

m.

19. The surface treatment method for a metallic glass component according to claim 5, wherein,