US4353737A
Expired / Lapsed
US
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Method of making metallic glass powders from glassy alloys
Assignee: Honeywell International Inc
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Filing: 1981-04-17
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Granted: 1982-10-12
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Expires: 2001-04-17
Abstract
Abstract Metallic glass powder is prepared by heating a solid metallic glass body to a temperature below its glass transition temperature for time sufficient to effect embrittlement, followed by comminution of the embrittled metallic glass body.
Inventors
- 👤 Ranjan Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:49
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/002; B22F9/008; B22F9/02; B22F9/04; C; C21; C21D; C21D1/00; C22; C22C; C22C45/00; B22F2009/041
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
47 words
A method for making metallic glass powder comprising: annealing a solid metallic glass body at temperature within the range from about 250° C. below its glass transition temperature up to its glass transition temperature, for time sufficient to effect embrittlement; and comminuting the embrittled metallic glass body.
Claim 2
Independent Claim
47 words
A method for making metallic glass powder comprising: annealing a solid metallic glass body at temperature within the range from about 250° C. below its glass transition temperature up to its glass transition temperature, for time sufficient to effect embrittlement; and comminuting the embrittled metallic glass body.
Claim 3
Dependent Claim
26 words
The method for making metallic glass powder according to claim 1 wherein the metallic glass is annealed under a vacuum of at least 10 -3 torr.
Claim 4
Dependent Claim
22 words
The method for making metallic glass powder according to claim 1 wherein the metallic glass body is annealed in an inert atmosphere.
Claim 5
Dependent Claim
19 words
The method for making metallic glass powder according to claim 3 wherein the inert atmosphere is an argon atmosphere.
Claim 6
Dependent Claim
21 words
The method for making metallic glass powder according to claim 3 wherein the inert atmosphere is provided by high purity argon.
Claim 7
Dependent Claim
34 words
The method for making metallic glass powder according to claim 1 wherein the solid metallic glass body is annealed at a temperature of between 50° C. and 150° C. below it glass transition temperature.
Claim 8
Dependent Claim
29 words
The method for making metallic glass powder according to claim 1 wherein the solid metallic glass body is annealed for a time period of less than about two hours.
Claim 9
Dependent Claim
22 words
The method for making metallic glass powder according to claim 7 wherein the metallic glass body is annealed in an inert atmosphere.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |