US4136211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making bearing materials
Assignee: National Aeronautics and Space Administration
•
Filing: 1977-12-13
•
Granted: 1979-01-23
•
Expires: 1997-12-13
Abstract
Abstract A composite material is described which will provide low friction surfaces for materials in rolling or sliding contact and is self-lubricating and oxidation resistant up to and in excess of about 930 DEG C. The composite is comprised of a metal component which lends strength and elasticity to the structure, a fluoride salt component which provides lubrication and, lastly, a glass component which not only provides oxidation protection to the metal but may also enhance the lubrication qualities of the composite.
Inventors
- 👤 Harold E. Sliney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:28
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/24; B22F3/26; C; C10; C10M; C10M103/00; C22; C22C; C22C32/00; C22C32/0089; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/12; F16C33/121; F16C33/14; C10M2201/00; C10M2201/04; C10M2201/05; C10M2201/08; C10M2201/081; C10M2201/082; C10M2201/084; C10M2201/12; C10N; C10N2040/00; C10N2040/02; F16C2220/00; F16C2220/20; F16C2220/60; F16C2223/00; F16C2223/02; F16C2223/08; F16C2223/30; F16C2223/42; F16C2226/00; F16C2226/30; F16C2226/32; F16C2226/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
A method for fabricating a self-lubricating, oxidation-resistant article comprising the steps of forming a frit of a glass capable of inhibiting oxidation in a metal capable of providing strength and elasticity to a temperature up to and in excess of about 930° C., mixing said glass frit with powders of said metal and powders of a fluoride salt capable of providing lubrication thereby forming a composition of matter, co-depositing the mixture of said metal, said fluoride salt and said glass on a substrate by means of plasma-arc spraying to form a coating having a thickness from about 0.010 centimeter to about 0.060 centimeter, and machining said coating to a thickness between about 0.005 centimeter and about 0.050 centimeter.
Claim 2
Independent Claim
118 words
A method for fabricating a self-lubricating, oxidation-resistant article comprising the steps of forming a frit of a glass capable of inhibiting oxidation in a metal capable of providing strength and elasticity to a temperature up to and in excess of about 930° C., mixing said glass frit with powders of said metal and powders of a fluoride salt capable of providing lubrication thereby forming a composition of matter, co-depositing the mixture of said metal, said fluoride salt and said glass on a substrate by means of plasma-arc spraying to form a coating having a thickness from about 0.010 centimeter to about 0.060 centimeter, and machining said coating to a thickness between about 0.005 centimeter and about 0.050 centimeter.
Claim 3
Dependent Claim
41 words
A method for fabricating a self-lubricating, oxidation-resistant article as claimed in claim 1, further comprising heat treating said deposit-containing substrate at a temperature of from about 760° C. to 900° C. for a period of from about 4 to 24 hours.
Claim 4
Dependent Claim
69 words
A method for fabricating a self-lubricating, oxidation-resistant article as claimed in claim 1, wherein said article comprises: (a) 20%-80% of an alloy consisting essentially of 80% Ni and 20% Cr; (b) 10% to 40% of CaF 2 ; (c) 10% to 40% of a glass consisting essentially of 20% BaO, 10% K 2 O, 10% CaO and 60% SiO 2 ; and (d) 0-50% Ag, Au or alloys thereof.
Claim 5
Dependent Claim
58 words
A method for fabricating a self-lubricating, oxidation-resistant article as claimed in claim 1, wherein said article comprises: (a) 67% of an alloy consisting essentially of 80% Ni and 20% Cr; (b) 161/2% of CaF 2 ; and (c) 161/2% of a glass consisting essentially of 20% BaO, 10% K 2 O, 10% CaO and 60% SiO 2 .
Claim 6
Dependent Claim
22 words
A method for fabricating a self-lubricating, oxidation-resistant article as claimed in claim 1 wherein the glass frit is formed by ball milling.
Claim 7
Dependent Claim
24 words
A method for fabricating a self-lubricating, oxidation-resistant article as claimed in claim 1 wherein the glass frit is sized to particles of 125 microns.
Claim 8
Dependent Claim
32 words
A method for fabricating a self-lubricating, oxidation-resistant article as claimed in claim 1 including the step of grit blasting the surface of said substrate prior to co-depositing the glass, metal and lubricant.
References Cited (Backward Citations)
US3257317A
Cited
US3297571A
Cited
US3242076A
Cited
US3378392A
Cited
US3370006A
Cited
US3419363A
Cited
US3508955A
Cited
US3598635A
Cited
US3941903A
Cited
US3954479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |