Patent US1009588A successfully refreshed from Google Patents.
Patent US4463058A successfully refreshed from Google Patents.
US4463058A
Expired / Lapsed
US
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Silicon carbide whisker composites
Assignee: Advanced Composite Materials Corp
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Filing: 1981-06-16
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Granted: 1984-07-31
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Expires: 2001-06-16
Abstract
Abstract The invention features a method and resultant article of the method, wherein deagglomerated silicon carbide whiskers are uniformly dispersed and/or distributed in a matrix material, generally a metal. The uniform distribution achieved by the invention greatly enhances the mechanical properties of the composite, such as the ultimate strength. The method comprises the deagglomeration of silicon carbide whiskers prior to mixing with matrix materials.
Inventors
- 👤 Paul E. Hood
- 👤 John O. Pickens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:14
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C03; C03C; C03C14/00; C03C14/004; C04B35/622; C04B35/626; C04B35/62605; C04B35/6261; C04B35/62625; C04B35/6264; C04B35/62695; C22; C22C; C22C47/00; C22C47/14; C03C2214/00; C03C2214/06; C04B2235/00; C04B2235/02; C04B2235/50; C04B2235/52; C04B2235/5208; C04B2235/5216; C04B2235/524; C04B2235/5244; C04B2235/5276; C04B2235/60; C04B2235/602; C04B2235/6021; Y; Y10; Y10S; Y10S75/00; Y10S75/95
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
A method of preparing a composite material including a reinforced matrix of substantially uniformly distributed deagglomerated silicon carbide whiskers, comprising the steps of: (a) deagglomerating agglomerated silicon carbide whiskers by mixing with a polar solvent and milling under conditions that result in a mixture substantially free from agglomeration; and (b) mixing the deagglomerated whiskers with a matrix material to form a mixture of substantially uniformly and homogeneously dispersed whiskers within said matrix material.
Claim 2
Independent Claim
73 words
A method of preparing a composite material including a reinforced matrix of substantially uniformly distributed deagglomerated silicon carbide whiskers, comprising the steps of: (a) deagglomerating agglomerated silicon carbide whiskers by mixing with a polar solvent and milling under conditions that result in a mixture substantially free from agglomeration; and (b) mixing the deagglomerated whiskers with a matrix material to form a mixture of substantially uniformly and homogeneously dispersed whiskers within said matrix material.
Claim 3
Dependent Claim
18 words
The method of claim 1, further comprising the step of: (c) forming a billet of said composite material.
Claim 4
Dependent Claim
27 words
The method of claim 1, wherein said deagglomerating step (a) further includes the step of: (c) forming a slurry of silicon carbide whiskers with a polar solvent.
Claim 5
Dependent Claim
14 words
The method of claim 2, further comprising the step of: (d) forging said billet.
Claim 6
Dependent Claim
14 words
The method of claim 2, further comprising the step of: (d) extruding said billet.
Claim 7
Dependent Claim
21 words
The method of claim 3, wherein said polar solvent is selected from a group consisting of alcohols, water and halogenated hydrocarbons.
Claim 8
Dependent Claim
30 words
The method of claim 1, wherein said matrix material is selected from a group consisting of aluminum, magnesium, titanium, lead, zinc, tin, iron, nickel, copper, antimony, mercury, and alloys thereof.
Claim 9
Dependent Claim
20 words
The method of claim 1, wherein said matrix material is selected from a group consisting of glass, ceramic and plastic.
Claim 10
Dependent Claim
35 words
A substantially homogeneous composite material comprising an aluminum matrix reinforced by silicon carbide whiskers deagglomerated according to the method of claim 1 which are substantially uniformly and homogeneously dispersed and distributed throughout said aluminum matrix.
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) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |