US4268276A
Expired / Lapsed
US
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Compact of boron-doped diamond and method for making same
Assignee: General Electric Co
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Filing: 1979-02-13
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Granted: 1981-05-19
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Expires: 1999-02-13
Abstract
Abstract In one embodiment, a compact for tools, such as cutting, drilling, wire drawing and shaping tools, consists essentially of a porous mass of self-bonded, boron-doped diamond particles and a catalyst-solvent material. The method for making such a compact comprises the steps of bonding a mass of boron-doped diamond particles, aided by a catalyst-solvent material, under high temperatures and high pressures (HP/HT). In another embodiment, a composite compact, which is made in a similar manner to the first embodiment, consists essentially of (i) a layer of a porous mass of self-bonded, boron-doped diamond particles and catalyst-solvent material; and (ii) a substrate layer of cemented carbide bonded to the diamond layer.
Inventors
- 👤 Harold P. Bovenkerk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:53
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/021; B; B01; B01J; B01J3/00; B01J3/06; B01J3/062; B23; B23B; B23B27/00; B23B27/14; B23B27/18; B23B27/20; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/64; C04B35/645; C04B35/6455; C04B37/023; C04B37/026; B01J2203/00; B01J2203/06; B01J2203/0605; B01J2203/062; B01J2203/065; B01J2203/0655; B01J2203/0675; B01J2203/0685; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2235/658; C04B2235/6582; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/123; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/363; C04B2237/40; C04B2237/401; C04B2237/405; C04B2237/50; C04B2237/61; C04B2237/76; C04B2237/765; C04B2237/84
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
79 words
In a process for making a compact comprising: (a) placing within a charge assembly (i) a mass comprised of diamond particles and (ii) a source of diamond catalyst-solvent material; and (b) subjecting said charge assembly and the contents thereof to thermodynamically stable conditions for the diamond content thereof at temperatures in the range of 1300° C. to 1600° C. and pressures in excess of about 45 kilobars; the improvement which comprises using boron doped diamond particles in step (a).
Claim 2
Dependent Claim
79 words
In a process for making a compact comprising: (a) placing within a charge assembly (i) a mass comprised of diamond particles and (ii) a source of diamond catalyst-solvent material; and (b) subjecting said charge assembly and the contents thereof to thermodynamically stable conditions for the diamond content thereof at temperatures in the range of 1300° C. to 1600° C. and pressures in excess of about 45 kilobars; the improvement which comprises using boron doped diamond particles in step (a).
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein said source of diamond catalyst-solvent is cemented carbide.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein said source of diamond catalyst-solvent is carbide molding powder.
Claim 5
Dependent Claim
15 words
The process of claim 1 wherein said source of diamond catalyst-solvent is a metal shim.
Claim 6
Dependent Claim
70 words
The process of claim 1 wherein said catalyst-solvent material is selected from the group consisting of: (a) a catalytic metal, in elemental form, selected from the group consisting of Group VIII metals Cr, Mn, Ta; (b) a mixture of alloyable metals of the catalytic metal(s) and non-catalytic metal(s); (c) an alloy of at least two of said catalytic metals; and (d) an alloy of the catalytic metal(s) and non-catalytic metal(s).
Claim 7
Dependent Claim
28 words
The process of claim 1 wherein the level of the boron dopant in said particles is between about 0.01% and 0.5% of the weight of the doped particles.
Claim 8
Dependent Claim
15 words
The process of claim 1 wherein said mass is at least 70% by volume diamond.
Claim 9
Dependent Claim
15 words
The process of claim 1 wherein said mass is at least 90% by volume diamond.
Claim 10
Dependent Claim
22 words
A compact comprised of a mass of self-bonded diamond particles doped with boron atoms distributed substantially uniformly throughout each of said particles.
Claim 11
Dependent Claim
22 words
A compact comprised of a mass of self-bonded diamond particles doped with boron atoms distributed substantially uniformly throughout each of said particles.
Claim 12
Dependent Claim
10 words
The compact of claim 9 wherein said mass is porous.
Claim 13
Dependent Claim
18 words
The compact of claim 10 which further comprises a catalyst-solvent material dispersed in the pores of said mass.
Claim 14
Dependent Claim
70 words
The compact of claim 11 wherein said catalyst-solvent material is selected from the group consisting of: (a) a catalytic metal, in elemental form, selected from the group consisting of Group VIII metals Cr, Mn, Ta; (b) a mixture of alloyable metals of the catalytic metal(s) and non-catalytic metal(s); (c) an alloy of at least two of said catalytic metals; and (d) an alloy of the catalytic metal(s) and non-catalytic metal(s).
Claim 15
Dependent Claim
21 words
The compact of claim 9 further comprising a mass of cemented carbide, said carbide bonded to said compact along an interface.
Claim 16
Dependent Claim
15 words
The compact of claim 9 wherein said mass is at least 90% by volume diamond.
Claim 17
Dependent Claim
23 words
The compact of claim 9 wherein said particles are boron-doped to a level between about 0.01% to 0.5% of the doped particle weight.
Claim 18
Dependent Claim
111 words
A compact comprising: (a) a porous mass of self-bonded, boron-doped diamond particles, said mass comprising at least 90% by volume diamond, said particles containing a boron-dopant level between about 0.01% to 0.5% of the doped particle weight; and (b) a catalyst-solvent material dispersed in the pores of said mass, said material selected from the group consisting of: (i) a catalytic metal, in elemental form, selected from the group consisting of Group VIII metals Cr, Mn, Ta; (ii) a mixture of alloyable metals of the catalytic metal(s) and non-catalytic metal(s); (iii) an alloy of at least two of said catalytic metals; and (iv) an alloy of the catalytic metal(s) and non-catalytic metal(s).
Claim 19
Dependent Claim
111 words
A compact comprising: (a) a porous mass of self-bonded, boron-doped diamond particles, said mass comprising at least 90% by volume diamond, said particles containing a boron-dopant level between about 0.01% to 0.5% of the doped particle weight; and (b) a catalyst-solvent material dispersed in the pores of said mass, said material selected from the group consisting of: (i) a catalytic metal, in elemental form, selected from the group consisting of Group VIII metals Cr, Mn, Ta; (ii) a mixture of alloyable metals of the catalytic metal(s) and non-catalytic metal(s); (iii) an alloy of at least two of said catalytic metals; and (iv) an alloy of the catalytic metal(s) and non-catalytic metal(s).
Claim 20
Dependent Claim
25 words
A compact comprised of: (a) a porous mass of self-bonded, boron-doped diamond particles; and (b) a catalyst-solvent material dispersed in the pores of said mass.
Claim 21
Dependent Claim
25 words
A compact comprised of: (a) a porous mass of self-bonded, boron-doped diamond particles; and (b) a catalyst-solvent material dispersed in the pores of said mass.
Claim 22
Dependent Claim
69 words
The compact of claim 17 wherein said material is selected from the group consisting of: (a) a catalytic metal, in elemental form, selected from the group consisting of Group VIII metals Cr, Mn, Ta; (b) a mixture of alloyable metals of the catalytic metal(s) and non-catalytic metal(s); (c) an alloy of at least two of said catalytic metals; and (d) an alloy of the catalytic metal(s) and non-catalytic metal(s).
Claim 23
Dependent Claim
21 words
The compact of claim 17 further comprising a mass of cemented carbide, said carbide bonded to said compact along an interface.
Claim 24
Dependent Claim
15 words
The compact of claim 17 wherein said mass is at least 90% by volume diamond.
Claim 25
Dependent Claim
23 words
The compact of claim 17 wherein said particles are boron-doped to a level between about 0.01% to 0.5% of the doped particle weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |