US4714660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard coatings with multiphase microstructures
Assignee: Fansteel Inc
•
Filing: 1985-12-23
•
Granted: 1987-12-22
•
Expires: 2005-12-23
Abstract
Abstract A coated cemented carbide product comprising a cemented carbide substrate and a dense chemical vapor deposited coating having a microstructure of at least two simultaneously co-deposited phases which form a composite layer. The microstructure of the composite layer has one phase dispersed either as discrete particulates or as oriented fibrous, rod-like or columnar particulates in the other phase.
Inventors
- 👤 Alfred S. Gates, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:18
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/007; B24D11/00; B24D3/001; B24D3/02; B24D3/04; C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C30/00; C23C30/005
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
157 words
A surface-coated article for cutting and wear applications comprising: (a) a substrate selected from the group consisting of cemented carbide, hard metals and high-temperature ceramics, and (b) a first chemical vapor deposition coating on said substrate comprised of a composite layer of at least two simultaneously co-deposited phases, a first of said phases being selected from the group consisting of: a carbide, carbonitride, nitride, oxycarbide, oxycarbonitride, silicide or boride of titanium, zirconium, hafnium, vanadium, niobium and tantalum; a carbide, silicide or boride of chromium, molybdenum and tungsten; and a carbide or nitride of silicon and boron; and a second of said phases being selected from the group consisting of an oxide or oxynitride of aluminum, titanium, zirconium, hafnium, magnesium, silicon and calcium, or stabilized zirconium oxide; said co-deposited phases comprising at least one phase present in fiber, rod-like or columnar form oriented with longitudinally axes in a direction normal to the substrate/coating interface in said composite layer.
Claim 2
Dependent Claim
157 words
A surface-coated article for cutting and wear applications comprising: (a) a substrate selected from the group consisting of cemented carbide, hard metals and high-temperature ceramics, and (b) a first chemical vapor deposition coating on said substrate comprised of a composite layer of at least two simultaneously co-deposited phases, a first of said phases being selected from the group consisting of: a carbide, carbonitride, nitride, oxycarbide, oxycarbonitride, silicide or boride of titanium, zirconium, hafnium, vanadium, niobium and tantalum; a carbide, silicide or boride of chromium, molybdenum and tungsten; and a carbide or nitride of silicon and boron; and a second of said phases being selected from the group consisting of an oxide or oxynitride of aluminum, titanium, zirconium, hafnium, magnesium, silicon and calcium, or stabilized zirconium oxide; said co-deposited phases comprising at least one phase present in fiber, rod-like or columnar form oriented with longitudinally axes in a direction normal to the substrate/coating interface in said composite layer.
Claim 3
Dependent Claim
13 words
A surface-coated article according to claim 1 wherein said substrate is cemented carbide.
Claim 4
Dependent Claim
25 words
A surface-coated article according to claim 1 wherein said first phase is selected from the group consisting of titanium-aluminum oxycarbide solid solution and titanium carbide.
Claim 5
Dependent Claim
17 words
A surface-coated article according to claim 1 wherein said second phase is comprised essentially of aluminum oxide.
Claim 6
Dependent Claim
18 words
A surface-coated article according to claim 1 wherein said second phase is comprised essentially of alpha aluminum oxide.
Claim 7
Dependent Claim
25 words
A surface-coated article according to claim 1 wherein said co-deposited phases comprise at least one phase present as discrete dispersed particles in said composite layer.
Claim 8
Dependent Claim
21 words
A surface-coated article according to claim 1 wherein said second phase is present as discrete dispersed particles in said composite layer.
Claim 9
Dependent Claim
36 words
A surface-coated article according to claim 1 wherein said second phase is present in fiber, rod-like or columnar form oriented in said co-deposited layer in a direction normal to the substrate/coating interface in said composite layer.
Claim 10
Dependent Claim
68 words
A surface-coated article according to claim 1 further comprising: (c) a second coating adjacent said substrate between said substrate and said first coating, said second coating comprising a layer selected from the group consisting of a carbide, carbonitride, nitride, oxycarbonitride, silicide or boride of titanium, zirconium, hafnium/ vanadium, niobium and tantalum; a carbide, silicide or boride of chromium, molybdenum and tungsten; and a nitride of silicon or boron.
Claim 11
Dependent Claim
16 words
The surface-coated article according to claim 9 wherein said second coating is comprised of titanium carbide.
Claim 12
Dependent Claim
79 words
A surface-coated article according to claim 1 further comprising an outer coating adjacent said co-deposited layer, said outer coating comprising at least one layer selected from the group consisting of a carbide, carbonitride, nitride, oxycarbonitride, silicide or boride of titanium, zirconium, hafnium, vanadium, niobium and tantalum; a carbide, silicide or boride of chromium, molybdenum and tungsten; a nitride of silicon or boron; and an oxide or oxynitride of aluminum, titanium, zirconium, hafnium, magnesium and calcium, or stabilized zirconium oxide.
Claim 13
Dependent Claim
16 words
The surface-coated article according to claim 11 wherein said outer coating is comprised of aluminum oxide.
Claim 14
Dependent Claim
65 words
A surface-coated article for cutting or wear applications comprising: a cemented carbide substrate, and a first coating on said substrate comprised of at least two simultaneously co-deposited phases, comprising a matrix phase selected from titanium-aluminum oxycarbide solid solution and titanium carbide, and a second phase being comprised of aluminum oxide as discrete dispersed particles or in fiber, rod-like or columnar form supported in the matrix.
Claim 15
Dependent Claim
65 words
A surface-coated article for cutting or wear applications comprising: a cemented carbide substrate, and a first coating on said substrate comprised of at least two simultaneously co-deposited phases, comprising a matrix phase selected from titanium-aluminum oxycarbide solid solution and titanium carbide, and a second phase being comprised of aluminum oxide as discrete dispersed particles or in fiber, rod-like or columnar form supported in the matrix.
Claim 16
Dependent Claim
27 words
The surface-coated article according to claim 13 further comprising a second coating intermediate said first coating and said substrate, said second coating being comprised of titanium carbide.
Claim 17
Dependent Claim
24 words
The surface-coated article according to claim 14 further comprising a third coating over said first coating, said third coating being comprised of aluminum oxide.
References Cited (Backward Citations)
US4052530A
Cited
US4169913A
Cited
US4389465A
Cited
US4269899A
Cited
US4357382A
Cited
US4406669A
Cited
US4441894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-21 | 1991-06-22 | 1991-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-21 | 1995-06-22 | 1995-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-21 | 1999-06-22 | 1999-12-22 | $7700.00 | Window Closed / Lapsed |