US4137075A
Expired / Lapsed
US
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Metallic glasses with a combination of high crystallization temperatures and high hardness values
Assignee: Honeywell International Inc
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Filing: 1977-05-25
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Granted: 1979-01-30
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Expires: 1997-05-25
Abstract
Abstract Glassy metal alloys which include substantial amounts of one or more of the refractory metals of molybdenum, tungsten, tantalum and niobium evidence both high thermal stability, with a high crystallization temperature of at least about 700 DEG C, and a high hardness of at least about 1000 kg/mm2.
Inventors
- 👤 Ranjan Ray
- 👤 Lee E. Tanner
- 👤 Carl F. Cline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:17
CPC Classifications
C; C22; C22C; C22C45/00; C22C45/008
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
165 words
A metal alloy which is primarily glassy and has high crystallization temperature and high hardness, characterized in that the metal alloy consists essentially of (a) about 15 to 25 atom percent of at least one metalloid selected from the group consisting of phosphorus, boron, carbon and silicon; (b) about 20 to 40 atom percent of least one metal selected from the group consisting of nickel, chromium, iron vanadium, cobalt and aluminum, with the proviso that when the metalloid consists essentially of boron, then about 20 to 55 atom percent of at least one of iron and cobalt is employed; and (c) about 40 to 60 atom percent of at least one refractory metal selected from the group consisting of molybdenum, tungsten, tantalum and niobium, with the proviso that when the metalloid consists essentially of boron and the metal consists essentially of at least one of iron and cobalt, then about 25 to 60 atom percent of at least one of molybdenum and tungsten is employed.
Claim 2
Dependent Claim
165 words
A metal alloy which is primarily glassy and has high crystallization temperature and high hardness, characterized in that the metal alloy consists essentially of (a) about 15 to 25 atom percent of at least one metalloid selected from the group consisting of phosphorus, boron, carbon and silicon; (b) about 20 to 40 atom percent of least one metal selected from the group consisting of nickel, chromium, iron vanadium, cobalt and aluminum, with the proviso that when the metalloid consists essentially of boron, then about 20 to 55 atom percent of at least one of iron and cobalt is employed; and (c) about 40 to 60 atom percent of at least one refractory metal selected from the group consisting of molybdenum, tungsten, tantalum and niobium, with the proviso that when the metalloid consists essentially of boron and the metal consists essentially of at least one of iron and cobalt, then about 25 to 60 atom percent of at least one of molybdenum and tungsten is employed.
Claim 3
Dependent Claim
11 words
The glassy metal alloy of claim 1 which is substantially glassy.
Claim 4
Dependent Claim
59 words
The glassy metal alloy of claim 1 consisting essentially of about 15 to 25 atom percent boron, about 20 to 55 atom percent of at least one metal selected from the group consisting of iron and cobalt and about 25 to 60 atom percent of at least one refractory metal selected from the group consisting of molybdenum and tungsten.
Claim 5
Dependent Claim
57 words
The glassy metal alloy of claim 3 consisting essentially of about 20 atom percent boron, about 30 to 40 atom percent of at least one metal selected from the group consisting of iron and cobalt and about 40 to 50 atom percent of at least one refractory metal selected from the group consisting of molybdenum and tungsten.
Claim 6
Dependent Claim
25 words
The glassy alloy of claim 4 consisting essentially of about 20 atom percent boron, about 40 atom percent iron and about 40 atom percent molybdenum.
Claim 7
Dependent Claim
30 words
The glassy alloy of claim 4 consisting essentially of about 20 atom percent boron, about 20 atom percent cobalt, about 20 atom percent iron and about 40 atom percent molybdenum.
Claim 8
Dependent Claim
79 words
The glassy alloy of claim 1 consisting essentially of about 18 to 22 atom percent of at least one metalloid selected from the group consisting of phosphorus, boron, carbon and silicon, about 25 to 35 atom percent of at least one metal selected from the group consisting of iron, cobalt, nickel, chromium, vanadium and aluminum and about 45 to 55 atom percent of at least one refractory metal selected from the group consisting of molybdenum, tungsten, tantalum and niobium.
Claim 9
Dependent Claim
19 words
The glassy alloy of claim 1 in which the refractory metal is at least one of molybdenum and tungsten.
Claim 10
Dependent Claim
13 words
The glassy alloy of claim 8 in which the refractory metal is molybdenum.
Claim 11
Dependent Claim
29 words
The glassy alloy of claim 9 containing at least about 25 atom percent of at least one metal selected from the group consisting of nickel, chromium, iron and aluminum.
Claim 12
Dependent Claim
40 words
The glassy alloy of claim 10 containing about 25 to 32 atom percent of at least one metal selected from the group consisting of nickel, chromium, iron and aluminum, about 12 atom percent phosphorus and about 8 atom percent boron.
Claim 13
Dependent Claim
32 words
The glassy alloy of claim 11 in which about 6 to 8 atom percent of phosphorus is replaced by at least one metalloid selected from the group consisting of carbon and silicon.
Claim 14
Dependent Claim
20 words
The glassy alloy of claim 10 in which about 8 to 20 atom percent of molybdenum is replaced by tungsten.
Claim 15
Dependent Claim
65 words
The glassy alloy of claim 8 consisting essentially of about 20 atom percent of at least one metalloid selected from the group consisting of phosphorus, boron, carbon and silicon, about 20 to 35 atom percent of at least one metal selected from the group consisting of nickel, iron and chromium, about 15 to 25 atom percent molybdenum and about 30 to 40 atom percent tungsten.
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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |