# US 10,118,861 B2 · Composite polycrystal

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,118,861 B2
- Document ID: US10118861B2
- Status: Granted
- Kind: B2
- Application number: 15/534,323
- Filed: 2016-10-07
- Published: 2017-11-23
- Granted: 2018-11-06
- Earliest claimed: 2015-10-30
- Assignees: Sumitomo Electric Industries, Ltd.
- Applicants: Sumitomo Electric Industries, Ltd.
- Inventors: Hitoshi Sumiya; Takeshi Sato
- Web page: https://patentgrep.com/patent/US10118861B2

## CPC

- C04B 35/52: based on carbon, e.g. graphite
- B26D 1/0006: {Cutting members therefor}
- C01B 32/26: Preparation (by using ultra-high pressure B01J3/06; by crystal growth C30B29/04)
- C04B 35/528: obtained from carbonaceous particles with or without other non-organic components
- C04B 35/645: Pressure sintering
- C09K 3/1436: {Composite particles, e.g. coated particles}
- C04B 2235/422: Carbon
- C04B 2235/425: Graphite
- C04B 2235/427: Diamond
- C04B 2235/5445: submicron sized, i.e. from 0,1 to 1 micron
- C04B 2235/5454: nanometer sized, i.e. below 100 nm
- C04B 2235/608: Green bodies or pre-forms with well-defined density
- C04B 2235/72: Products characterised by the absence or the low content of specific components, e.g. alkali metal free alumina ceramics
- C04B 2235/781: Nanograined materials, i.e. having grain sizes below 100 nm
- C04B 2235/785: Submicron sized grains, i.e. from 0,1 to 1 micron
- C04B 2235/80: Phases present in the sintered or melt-cast ceramic products other than the main phase
- C04B 2235/85: Intergranular or grain boundary phases
- C04B 2235/96: Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- B26D: CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING (for growing crops or plants A01D, A01G; for fodder or straw A01F; for bulk butter A01J; for dough A21C; slaughtering A22B; for tobacco, cigars or cigarettes A24; marking-out, perforating or making buttonholes A41H25/00; manufacturing footwear A43D; brushmaking A46D; surgery A61B; disintegrating, mincing or shredding in general B02C; cutting wire, making pins or nails B21F, B21G; of the kind used formetal B23; cutting by abrasive fluid jets B24C5/02; hand-held cutting tools B26B; perforating, cutting-out, stamping-out or punching, or severing by means other than cutting B26F; for wood B27; for stone B28D; working of plastics or substances in a plastic state B29; making boxes, cartons, envelopes or bags, of paper or similarly worked materials, e.g. metal foil, B31B; article or web delivery apparatus incorporating cutting or line-perforating devices B65H35/00; for leather or upholstery B68, C14B; for glass C03B; making matches C06F; for peat C10F; for sugar C13B45/00; for textile materials D06H; civil engineering, building, mining, see Section E; for light guides G02B6/25; cutting processed photographic material G03D15/04)
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

A composite polycrystal contains polycrystalline diamond formed of diamond grains that are directly bonded mutually, and non-diamond carbon dispersed in the polycrystalline diamond, and has a concentration of contained hydrogen of less than or equal to 1000 ppm.

## Claims

### Claim 1

A composite polycrystal comprising: polycrystalline diamond formed of diamond grains that are directly bonded mutually, and non-diamond carbon dispersed in said polycrystalline diamond, wherein
the composite polycrystal has a concentration of contained hydrogen of less than or equal to 1000 ppm; and
said diamond grains forming said polycrystalline diamond have a mean grain size of greater than or equal to 10 nm and less than or equal to 500 nm.

### Claim 2 (depends on 1)

The composite polycrystal according to claim 1, wherein said polycrystalline diamond has a phase that is continuous three-dimensionally.

### Claim 3 (depends on 1)

The composite polycrystal according to claim 1, wherein said non-diamond carbon has a mean grain size of greater than or equal to 10 nm and less than or equal to 500 nm.

### Claim 4 (depends on 1)

The composite polycrystal according to claim 1, wherein said non-diamond carbon has a percentage in said composite polycrystal in whole of greater than or equal to 0.1% and less than or equal to 30% as calculated from 100×Ig (002)/{Id (111)+Ig (002)} wherein Ig (002) is an area of an X-ray diffraction peak derived from (002) surface of said non-diamond carbon, and Id (111) is an area of an X-ray diffraction peak derived from (111) surface of said polycrystalline diamond in an X-ray diffraction profile of said composite polycrystal.

### Claim 5 (depends on 1)

The composite polycrystal according to claim 1, wherein said non-diamond carbon is graphite.

### Claim 6 (depends on 1)

The composite polycrystal according to claim 1, wherein said non-diamond carbon is amorphous carbon.

### Claim 7 (depends on 1)

The composite polycrystal according to claim 1, having a Knoop hardness of greater than or equal to 50 GPa.

### Claim 8

A composite polycrystal comprising: polycrystalline diamond formed of diamond grains that are directly bonded mutually, and non-diamond carbon dispersed in said polycrystalline diamond, wherein
the composite polycrystal has a concentration of contained hydrogen of less than or equal to 1000 ppm;
said polycrystalline diamond has a phase that is continuous three-dimensionally;
said diamond grains forming said polycrystalline diamond have a mean grain size of greater than or equal to 10 nm and less than or equal to 500 nm;
said non-diamond carbon has a mean grain size of greater than or equal to 10 nm and less than or equal to 500 nm;
said non-diamond carbon has a percentage in said composite polycrystal in whole of greater than or equal to 0.1% and less than or equal to 30% as calculated from 100×Ig (002)/{Id (111)+Ig (002)} wherein Ig (002) is an area of an X-ray diffraction peak derived from (002) surface of said non-diamond carbon, and Id (111) is an area of an X-ray diffraction peak derived from (111) surface of said polycrystalline diamond in an X-ray diffraction profile of said composite polycrystal;
said non-diamond carbon is either one of graphite and amorphous carbon; and
the composite polycrystal has a Knoop hardness of greater than or equal to 50 GPa.