COMPOSITE DIAMOND BODY AND COMPOSITE DIAMOND TOOL

• US 20170320144A1
• Filed: 10/29/2015
• Published: 11/09/2017
• Est. Priority Date: 10/29/2014
• Status: Active Grant

• Current Assignee: Sumitomo Electric Hardmetal Corp (Sumitomo Corporation), Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Original Assignee: Sumitomo Electric Hardmetal Corp (Sumitomo Corporation), Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Inventors: Nishibayashi, Yoshiki, Ueda, Akihiko, Kobayashi, Yutaka
• Granted Patent: US 10,639,725 B2
• Time in Patent Office: Days
• CPC Class Codes: B23B 2222/68 Palladium
• CPC Class Codes: B23B 2222/72 Platinum
• CPC Class Codes: B23B 2222/84 Steel high speed steel B23B2222/32, stainless steel B23B2222/80
• CPC Class Codes: B23B 2226/31 Diamond
• CPC Class Codes: B23B 2226/315 polycrystalline [PCD]
• CPC Class Codes: B23B 2228/04 applied by chemical vapour deposition [CVD]
• CPC Class Codes: B23B 2228/36 Multi-layered
• CPC Class Codes: B23B 2240/08 Brazed connections
• CPC Class Codes: B23B 27/148 Composition of the cutting inserts
• CPC Class Codes: B23B 27/20 with diamond bits or cutting inserts
• CPC Class Codes: C23C 14/0617 AIII BV compounds, where A is Al, Ga, In or Tl and B is N, P, As, Sb or Bi
• CPC Class Codes: C23C 14/0635 Carbides
• CPC Class Codes: C23C 14/0641 Nitrides C23C14/0617 takes precedence
• CPC Class Codes: C23C 14/18 on other inorganic substrates
• CPC Class Codes: C23C 14/185 by cathodic sputtering
• CPC Class Codes: C23C 14/352 using more than one target C23C14/56 takes precedence
• CPC Class Codes: C23C 14/48 Ion implantation
• CPC Class Codes: C23C 14/5806 Thermal treatment
• CPC Class Codes: C23C 16/06 characterised by the deposition of metallic material
• CPC Class Codes: C23C 16/27 Diamond only
• CPC Class Codes: C30B 25/00 : Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
• CPC Class Codes: C30B 29/04 : Diamond
• CPC Class Codes: C30B 31/22 : by ion-implantation

Abstract

A composite diamond body includes a diamond base material and a stable layer disposed on the diamond base material. The stable layer may have a thickness of 0.001 μm or more and less than 10 μm, and may include a plurality of layers. A composite diamond tool includes the composite diamond body. There are thus provided highly wear-resistant composite diamond body and composite diamond tool that are even applicable to mirror-finish planarization of a workpiece which reacts with diamond to cause the diamond to wear.

Claims

1. A composite diamond body comprising:

a diamond base material; and

at least one stable layer disposed in at least one of

a position on the diamond base material and

a position in an inner region from a surface of the diamond base material to occupy at least a part of the diamond base material.

2. The composite diamond body according to claim 1, wherein

the stable layer has a thickness of 0.001 μ

m or more and less than 10 μ

m.

3. The composite diamond body according to claim 1, wherein

the stable layer includes a plurality of layers.

4. The composite diamond body according to claim 1, wherein

the stable layer includes at least one kind of metal selected from the group consisting of tungsten, tantalum, molybdenum, niobium, vanadium, chromium, titanium, zirconium, and hafnium.

5. The composite diamond body according to claim 1, wherein

the stable layer includes at least one kind of metal selected from the group consisting of ruthenium, osmium, rhodium, iridium, palladium, and platinum.

6. The composite diamond body according to claim 1, wherein

the stable layer includes at least one kind of carbide selected from the group consisting of tungsten carbide, tantalum carbide, molybdenum carbide, niobium carbide, vanadium carbide, chromium carbide, titanium carbide, zirconium carbide, hafnium carbide, and silicon carbide.

7. The composite diamond body according to claim 1, wherein

the stable layer includes an inner stable layer located at a side of the diamond base material, and

the inner stable layer includes at least one kind of metal selected from the group consisting of ruthenium, osmium, rhodium, iridium, palladium, and platinum.

8. The composite diamond body according to claim 1, wherein

the stable layer includes an inner stable layer located at a side of the diamond base material, and

the inner stable layer includes at least one kind of carbide selected from the group consisting of tungsten carbide, tantalum carbide, molybdenum carbide, niobium carbide, vanadium carbide, chromium carbide, titanium carbide, zirconium carbide, hafnium carbide, and silicon carbide.

9. The composite diamond body according to claim 1, wherein

the stable layer includes at least one layer which is a deposited layer disposed on the diamond base material.

10. The composite diamond body according to claim 1, wherein

the stable layer includes at least one layer which is an ion-implanted layer disposed in the inner region from the surface of the diamond base material to occupy at least a part of the diamond base material.

11. The composite diamond body according to claim 10, wherein

the ion-implanted layer includes separate portions located in respective multiple regions each having a diameter of less than 1 μ

m as seen in a direction perpendicular to the surface of the diamond base material.

12. The composite diamond body according to claim 1, wherein

the stable layer includes at least one layer which is an annealed layer disposed in at least one of

a position on the diamond base material and

a position in the inner region from the surface of the diamond base material to occupy at least a part of the diamond base material.

13. The composite diamond body according to claim 1, wherein

the diamond base material is formed of at least one of synthetic single crystal diamond and synthetic polycrystalline diamond.

14. The composite diamond body according to claim 1, wherein

the diamond base material is formed of vapor-phase-synthesized diamond having a non-substitutional nitrogen concentration of more than 1 ppm.

15. The composite diamond body according to claim 1, further comprising a diamond surface layer disposed on the stable layer and having a thickness of 5 μ

m or less.

16. A composite diamond tool comprising a composite diamond body as recited in claim 1.