US4134759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light metal matrix composite materials reinforced with silicon carbide fibers
Assignee: Research Institute for Iron Steel and Other Metals of Tohoku University
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Filing: 1976-12-13
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Granted: 1979-01-16
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Expires: 1996-12-13
Abstract
Abstract Light metal composite materials reinforced with novel continuous silicon carbide fibers composed of aluminum, aluminum alloy or magnesium alloy matrix and the continuous silicon carbide fibers containing 0.01-40% by weight of free carbon, in which the free carbon is reacted with aluminum or added metal elements in the aluminum alloy or magnesium alloy to form carbides. When the silicon carbide fibers are coated with a metal or ceramics, the wettability of the silicon carbide fibers to said matrix is more improved.
Inventors
- 👤 Seishi Yajima
- 👤 Josaburo Hayashi
- 👤 Mamoru Omori
- 👤 Hideo Kayano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:51
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/62227; C04B35/62272; C04B35/62277; C04B35/62281; C04B35/71; C04B35/78; C04B35/80; C04B35/626; C04B35/62605; C04B35/62645; C04B35/6265; C04B35/62675; C04B35/6268; C04B35/628; C04B35/62844; C04B35/62847; C04B35/62849; C04B35/62852; C04B35/62855; C04B35/62857; C04B35/6286; C04B35/62863; C04B35/62865; C04B35/62871; C04B35/62876; C04B35/62878; C04B35/62884; C04B35/62897; C22; C22C; C22C47/00; C22C47/08; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/48; C04B2235/483; C04B2235/50; C04B2235/52; C04B2235/5208; C04B2235/5216; C04B2235/524; C04B2235/5244; C04B2235/5264; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12444; Y10T428/12486
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
111 words
A method for producing aluminum, aluminum alloy or magnesium alloy composite material reinforced with continuous silicon carbide fibers, which comprises arranging 80-20% by volume of the continuous silicon carbide fibers containing 0.01-40% by weight of free carbon obtained by baking spun fibers consisting mainly of an organosilicon high molecular weight compound in 20-80% by volume of fused aluminum matrix, to react the free carbon contained in the silicon carbide fibers with aluminum or the metal elements contained in the above described aluminum alloy or magnesium alloy which easily form carbides, to form carbides of these metals and to make the wettability of the silicon carbide fibers to the metal matrix high.
Claim 2
Independent Claim
111 words
A method for producing aluminum, aluminum alloy or magnesium alloy composite material reinforced with continuous silicon carbide fibers, which comprises arranging 80-20% by volume of the continuous silicon carbide fibers containing 0.01-40% by weight of free carbon obtained by baking spun fibers consisting mainly of an organosilicon high molecular weight compound in 20-80% by volume of fused aluminum matrix, to react the free carbon contained in the silicon carbide fibers with aluminum or the metal elements contained in the above described aluminum alloy or magnesium alloy which easily form carbides, to form carbides of these metals and to make the wettability of the silicon carbide fibers to the metal matrix high.
Claim 3
Dependent Claim
31 words
The method as claimed in claim 1, wherein the metal element in said aluminum alloy which easily forms the carbide with the free carbon is silicon, manganese, chromium, titanium or calcium.
Claim 4
Dependent Claim
32 words
The method as claimed in claim 1, wherein the metal element in said magnesium alloy which easily forms the carbide with the free carbon is aluminum, manganese, zirconium, silicon calcium or yttrium.
Claim 5
Dependent Claim
27 words
The method as claimed in claim 1, wherein said continuous silicon carbide fibers are coated with at least one material selected from a metal or a ceramic.
Claim 6
Dependent Claim
35 words
The method as claimed in claim 4, wherein said metal is selected from the group consisting of B, Mn, Mo, Al, W, Si, Cr, Ca, Ce, V, U, Th, Nb, Ta, Ti, Zr, and Hf.
Claim 7
Dependent Claim
47 words
The method as claimed in claim 4, wherein said metal is selected from the group consisting of Be, Mg, Fe, Co, Ni, Cu, Zn, Ge, Pd, Ag, Cd, Sn, Sb, Pt, Au and Pb and alloys consisting of at least two metal elements of the above metals.
Claim 8
Dependent Claim
39 words
The method as claimed in claim 4, wherein said ceramics are Mg0, Al 2 O 3 , TiO 2 , ZnO, AlN, Mg 2 N 2 , Si 3 N 4 , Ti N, ZrN, TiC, ZrC or WC.
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) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |