| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_80713b1ded8e1b89fbd40bcb7588346a |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22C29-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-76
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F2005-001
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22C2026-003
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-386
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22C29-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-427
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F2003-244
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-5472 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B10-5676
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F7-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22C26-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B10-46
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-5831
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-645
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F3-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-528
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-638
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22C29-08 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F7-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B10-46
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22C26-00 |
| filingDate |
2017-12-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_51842e9adca0f013662716455acf1495 |
| publicationDate |
2018-08-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
GB-2559481-A |
| titleOfInvention |
Superhard constructions and methods of making same |
| abstract |
A polycrystalline construction comprises a body of super hard material bonded to a substrate, the body comprising an outer peripheral region 30 formed of inter-bonded grains of super hard material extending around one or more inner regions 32, 34 and having a radial thickness proportional to the square of the ratio of the fracture toughness of the material forming the outer peripheral region to the transverse rupture strength of the material. The body of super hard material may comprise two or more concentric inner regions or rings 32, 34 located within the outer peripheral region, with the inner and outer regions being formed from polycrystalline diamond material having progressively increasing toughness from the outer ring to the inner core and increasing hardness from the inner core region to the outer ring. The outer region is preferably more abrasive resistant than the inner region or regions. The super hard grains may comprise diamond or cubic boron nitride (cBN) or both. A tool comprising the construction may comprise a drill bit for earth boring or rock drilling or a rotary fixed cutter bit for oil and gas drilling. |
| priorityDate |
2016-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |