Patent US4424066A successfully refreshed from Google Patents.
US4424066A
Expired / Lapsed
US
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Alumina coated composite silicon aluminum oxynitride cutting tools
Assignee: Verizon Laboratories Inc
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Filing: 1982-05-20
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Granted: 1984-01-03
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Expires: 2002-05-20
Abstract
Abstract Coated abrasion resistant composite ceramic cutting tools comprise a composite substrate body consisting essentially of a particulate material selected from the group consisting of the refractory metal carbides, nitrides, carbonitrides and combinations thereof uniformly distributed in a matrix, coated with at least one adherent coating layer of alumina. The particulate material is of an average particle size ranging between about 0.5 microns to about 20 microns and comprises from about 5 to about 60 volume percent of the composite cutting tool. The matrix consists essentially of a modified silicon aluminum oxynitride having about 2 to about 25 volume percent of a modifier selected from the oxides of silicon, yttrium, magnesium, hafnium, zirconium, beryllium, the lanthanides and combinations thereof.
Inventors
- 👤 Vinod K. Sarin
- 👤 Sergej-Tomislav Buljan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:58
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/50; C04B41/5053; B; B23; B23B; B23B27/00; B23B27/14; B23B27/148; C04B35/00; C04B35/515; C04B35/58; C04B35/597; C04B41/5025; C04B41/80; C04B41/81; C04B41/85; C04B41/87; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
116 words
A coated abrasion resistant composite ceramic cutting tool comprising a substrate body and at least one adherent alumina coating layer; said substrate body consisting essentially of a particulate material selected from the group consisting of the refractory metal carbides, nitrides, carbonitrides and mixtures thereof uniformly distributed in a matrix comprising a modified silicon aluminum oxynitride, said particulate material comprising from about 5 volume percent to about 60 volume percent of said cutting tool and having an average particle size of between about 0.5 microns and about 20 microns; said modified silicon aluminum oxynitride having a modifier selected from the group consisting of the oxides of silicon, yttrium, magnesium, hafnium, zirconium, beryllium, the lanthanides and combinations thereof.
Claim 2
Dependent Claim
116 words
A coated abrasion resistant composite ceramic cutting tool comprising a substrate body and at least one adherent alumina coating layer; said substrate body consisting essentially of a particulate material selected from the group consisting of the refractory metal carbides, nitrides, carbonitrides and mixtures thereof uniformly distributed in a matrix comprising a modified silicon aluminum oxynitride, said particulate material comprising from about 5 volume percent to about 60 volume percent of said cutting tool and having an average particle size of between about 0.5 microns and about 20 microns; said modified silicon aluminum oxynitride having a modifier selected from the group consisting of the oxides of silicon, yttrium, magnesium, hafnium, zirconium, beryllium, the lanthanides and combinations thereof.
Claim 3
Dependent Claim
28 words
A coated abrasion resistant composite ceramic cutting tool in accordance with claim 1 wherein said coating layer is of a thickness between about 0.1 microns and 10 microns.
Claim 4
Dependent Claim
28 words
A coated abrasion resistant composite ceramic cutting tool in accordance with claim 2 wherein said coating layer is of a thickness between about 1.0 and about 10 microns.
Claim 5
Dependent Claim
53 words
A coated abrasion esistant composite ceramic cutting tool in accordance with claim 1 wherein said modified silicon aluminum oxynitride is formed from about 2 to about 25 volume percent of said modifier, from about 20 to about 90 volume percent silicon nitride, and from about 5 to about 60 volume percent aluminum oxide.
Claim 6
Dependent Claim
31 words
A coated abrasion resistant composite ceramic cutting tool in accordance with claim 1 wherein the average particle size of said particulate material ranges between about 0.5 microns and about 5 microns.
Claim 7
Dependent Claim
30 words
A coated abrasion resistant composite ceramic cutting tool in accordance with claim 1 wherein said particulate material comprises from about 20 to about 40 volume percent of said cutting tool.
Claim 8
Dependent Claim
28 words
A coated abrasion resistant composite ceramic cutting tool in accordance with claim 6 wherein sad modifier comprises from about 2 to about 10 volume percent of said matrix.
Claim 9
Dependent Claim
32 words
A coated abrasion resistant composite ceramic cutting tool in accordance with claim 1 wherein said particulate material is selected from the carbides of titanium, tungsten, hafnium, niobium, tantalum, vanadium, and combinations thereof.
Claim 10
Dependent Claim
31 words
A coated abrasion resistant composite ceramic cutting tool in accordance with claim 1 wherein said particulate material is selected from the group consisting of titanium nitride, hafnium nitride, and combinations thereof.
Claim 11
Dependent Claim
31 words
A coated abrasion resistant composite ceramic cutting tool in accordance with claim 1 wherein said particulate material is selected from the group consisting of titanium carbonitride, hafnium carbonitride, and combinations thereof.
Claim 12
Dependent Claim
20 words
A coated abrasion resistant composite ceramic cutting tool in accordance with claim 8 wherein said particulate material is titanium carbide.
Claim 13
Dependent Claim
19 words
A coated abrasion resistant composite ceramic cutting tool in accordance with claim 1 wherein said modifier is yttrium oxide.
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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) | 1987-01-02 | 1987-07-04 | 1988-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-02 | 1991-07-04 | 1992-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-02 | 1995-07-04 | 1996-01-03 | $7700.00 | Window Closed / Lapsed |