US6214079B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triphasic composite and method for making same
Assignee: Rutgers, The State University of New Jersey
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Filing: 1999-12-21
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Granted: 2001-04-10
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Expires: 2019-12-21
Abstract
Abstract A method for fabricating a triphasic composite such as a WC/Co/diamond composite with a high volume fraction of diamond in a WC/Co matrix. The method involves sintering of a WC/Co powder compact to develop a porous preform, which displays some rigidity and strength, infiltrating the porous preform with a controlled distribution of carbon, and high pressure/high temperature treatment of the carbon-containing WC/Co preform to transform the carbon to diamond. The distribution of diamond in the composite can be functionally graded to provide a WC/Co core and a diamond-enriched surface, wherein all three phases form an interconnected structure in three dimensions. Such a tricontinuous structure combines high strength and toughness with superior wear resistance, making it attractive for applications in machine tools and drill bits.
Inventors
- 👤 Bernard H. Kear
- 👤 Rajendra K. Sadangi
- 👤 Larry E. McCandlish
- 👤 Oleg Voronov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:29
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/24; B22F3/26; C; C22; C22C; C22C1/00; C22C1/04; C22C1/05; C22C1/051; C22C1/053; C22C1/056; B22F5/00; B22F2005/001
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
58 words
A tricontinuous composite comprising: a superhard phase material; a hard phase material; and a binder phase material; wherein the three material phases are three-dimensionally interconnected, the superhard phase material forms approximately 10-80 volume percent of an exterior surface of the composite, and each of the three material phases has a grain size which is less than 0.1 microns.
Claim 2
Dependent Claim
58 words
A tricontinuous composite comprising: a superhard phase material; a hard phase material; and a binder phase material; wherein the three material phases are three-dimensionally interconnected, the superhard phase material forms approximately 10-80 volume percent of an exterior surface of the composite, and each of the three material phases has a grain size which is less than 0.1 microns.
Claim 3
Dependent Claim
59 words
The composite according to claim 1 , wherein the hard phase material comprises a material selected from the group consisting of WC, SiC, B 4 C, Cr 3 C 2 , VC, TaC, NbC, HfC and mixtures thereof, the binder phase material comprises a material selected from the group consisting of Co, Ni, Cr, Fe, Mn, and mixtures thereof.
Claim 4
Dependent Claim
39 words
The composite according to claim 2 , wherein the superhard phase material comprises a material selected from the group consisting of diamond, cubic BN, boron carbonitride, mixtures of diamond and cubic BN, and mixtures of diamond and boron carbonitride.
Claim 5
Dependent Claim
39 words
The composite according to claim 1 , wherein the superhard phase material comprises a material selected from the group consisting of diamond, cubic BN, boron carbonitride, mixtures of diamond and cubic BN, and mixtures of diamond and boron carbonitride.
Claim 6
Dependent Claim
21 words
The composite according to claim 1 , wherein the hard phase material comprises WC and the binder phase material comprises Co.
Claim 7
Dependent Claim
37 words
The composite according to claim 5 , wherein the superhard phase material comprises diamond, the diamond and WC phases forming approximately 50-97 volume percent of the composite and the Co phase forming a balance of the composite.
Claim 8
Dependent Claim
27 words
The composite according to claim 6 , wherein each of the three material phases has a grain size which approximately ranges between 0.005 microns and 0.1 microns.
Claim 9
Dependent Claim
26 words
The composite according to claim 1 , wherein each of the material phases has a grain size which approximately ranges between 0.005 microns and 0.1 microns.
Claim 10
Dependent Claim
18 words
The composite according to claim 1 , wherein the superhard phase material is uniformly distributed throughout the composite.
Claim 11
Dependent Claim
21 words
The composite according to claim 1 , wherein the volume percentage of the superhard phase material changes gradually through the composite.
Claim 12
Dependent Claim
23 words
The composite according to claim 1 , wherein the composite defines one of a machine tool, a drill bit, and a wear part.
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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) | 2004-04-09 | 2004-10-09 | 2005-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-04-09 | 2008-10-09 | 2009-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-04-09 | 2012-10-09 | 2013-04-10 | $7700.00 | Window Closed / Lapsed |