US5009673A
Expired / Lapsed
US
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Method for making polycrystalline sandwich compacts
Assignee: Diamond Innovations Inc
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Filing: 1988-11-30
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Granted: 1991-04-23
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Expires: 2008-11-30
Abstract
Abstract Disclosed is a method for manufacturing a polycrystalline sandwich compact comprising a polycrystalline diamond or CBN core interposed between outer support layers. The method comprises providing an assembly comprising a mass of diamond or CBN particles, a pair of compression disks, and two metal layers, one of each of which is interposed between said mass and each said compression disk. When said mass comprises diamond particles, a source of sintering aid/catalyst for diamond sintering also is provided in the assembly and optionally for CBN particles a source of sintering aid/catalyst for CBN sintering is provided in said assembly. The assembly then is subjected to HP/HT sintering for forming a sintered polycrystalline diamond or CBN core having two metal-derived support layers adherently bound thereto.
Inventors
- 👤 Hyun S. Cho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:48
CPC Classifications
B; B01; B01J; B01J3/00; B01J3/06; B01J3/062; B32; B32B; B32B18/00; C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/583; C04B35/5831; C04B35/622; C04B35/64; C04B35/645; C04B37/00; C04B37/02; C04B37/023; C04B37/026; B01J2203/00; B01J2203/06; B01J2203/0605; B01J2203/062; B01J2203/0645; B01J2203/065; B01J2203/0655; B01J2203/066; B01J2203/0675; B01J2203/0685; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6562; C04B2235/6567; C04B2235/658; C04B2235/66; C04B2235/668; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/123; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/361; C04B2237/363; C04B2237/40; C04B2237/401; C04B2237/50; C04B2237/60
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
96 words
A method for manufacturing a polycrystalline sandwich compact comprising a polycrystalline diamond or CBN core interposed between outer support layers, which comprises: (a) providing an assembly comprising a mass of diamond or CBN particles; a pair of compression disks; two metal layers, one each of which is interposed between said mass and each of said compression disks; and when said mass comprises diamond particles, a source of sintering aid/catalyst for diamond sintering; (b) subjecting said assembly to HP/HT sintering for forming a sintered polycrystalline diamond or CBN core having two metal-derived support layers adherently bound thereto.
Claim 2
Independent Claim
96 words
A method for manufacturing a polycrystalline sandwich compact comprising a polycrystalline diamond or CBN core interposed between outer support layers, which comprises: (a) providing an assembly comprising a mass of diamond or CBN particles; a pair of compression disks; two metal layers, one each of which is interposed between said mass and each of said compression disks; and when said mass comprises diamond particles, a source of sintering aid/catalyst for diamond sintering; (b) subjecting said assembly to HP/HT sintering for forming a sintered polycrystalline diamond or CBN core having two metal-derived support layers adherently bound thereto.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein when said mass comprises CBN particles, a source of sintering aid/catalyst for CBN sintering is provided.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein both said metal layers also include a source of sintering aid/catalyst for diamond sintering.
Claim 5
Dependent Claim
21 words
The method of claim 2 wherein each of said metal layers also includes a source of sintering aid/catalyst for CBN sintering.
Claim 6
Dependent Claim
21 words
The method of claim 1 wherein only one of said metal layers includes a source of sintering aid/catalyst for diamond sintering.
Claim 7
Dependent Claim
21 words
The method of claim 2 wherein only one of said metal layers includes a source of sintering aid/catalyst for CBN sintering.
Claim 8
Dependent Claim
31 words
The method of claim 1 wherein said metal of said metal layers is selected from the group consisting of molybdenum, tantalum, tungsten, zirconium, titanium, copper, niobium, alloys thereof, and mixtures thereof.
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein each of said compression disks comprises cemented carbide.
Claim 10
Dependent Claim
43 words
The method of claim 8 wherein said cemented carbide is selected from the group consisting of tungsten carbide, titanium carbide, tantalum carbide, and mixtures thereof; cemented with a bonding medium selected from the group consisting of cobalt, nickel, iron, chromium, and mixtures thereof.
Claim 11
Dependent Claim
33 words
The method of claim 1 wherein said diamond sintering aid/catalyst is selected from the group consisting of cobalt, nickel, iron, ruthenium, rhodium, palladium, platinum, chromium, manganese, tantalum, osmium, irridium, mixtures and alloys thereof.
Claim 12
Dependent Claim
47 words
The method of claim 2 wherein said CBN sintering aid/catalyst is selected from the group consisting of a Group VIII metal, chromium, tantalum, manganese, aluminum, and aluminum alloyed with a metal selected from the group consisting of nickel, cobalt, manganese, iron, vanadium, and chromium; and mixtures thereof.
Claim 13
Dependent Claim
32 words
The method of claim 1 wherein said source of sintering aid/catalyst adjacent to said mass is not interposed between said mass and said compression disk, for infiltrating through said mass during sintering.
Claim 14
Dependent Claim
28 words
The method of claim 1 wherein said HP/HT conditions comprise a temperature of between about 1200° and 1500° C. and a pressure in excess of about 50 Kbar.
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| 3.5 Years (Year 4) | 1994-04-22 | 1994-10-22 | 1995-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-22 | 1998-10-22 | 1999-04-23 | $3760.00 | Window Closed / Lapsed |
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