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US4720434A Expired / Lapsed US ⏱️ 0.0 years remaining

Composite material including silicon carbide and/or silicon nitride short fibers as reinforcing material and aluminum alloy with copper and relatively small amount of silicon as matrix metal

Assignee: Toyota Motor Corp
•
Filing: 1986-08-28
•
Granted: 1988-01-19
•
Expires: 2006-08-28
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Abstract

Abstract A composite material is made from silicon carbide and/or silicon nitride short fibers embedded in a matrix of metal. The metal is an alloy consisting essentially of between approximately 2% to approximately 6% of copper, between approximately 0.5% to approximately 3% of silicon, and remainder substantially aluminum. The short fibers may be all silicon carbide short fibers, or may be all silicon nitride short fibers, or may be a mixture of silicon carbide and silicon nitride short fibers. The fiber volume proportion of the silicon carbide and/or silicon nitride short fibers may desirably be between approximately 5% and approximately 50%, and may more desirably be between approximately 5% and approximately 40%.

Inventors

  • 👤 Masahiro Kubo
  • 👤 Tadashi Dohnomoto
  • 👤 Atsuo Tanaka
  • 👤 Hidetoshi Hirai

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 16:41
CPC Classifications
C; C22; C22C; C22C49/00; C22C49/02; C22C49/04; C22C49/06; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/1216; Y10T428/12486; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 60 words
A composite material, comprising short fibers, the material of each one of which is selected from the class made up of silicon carbide and silicon nitride, embedded in a matrix of metal, said metal being an alloy consisting essentially of between approximately 2% to approximately 6% of copper, between approximately 0.5% to approximately 3% of silicon, and remainder substantially aluminum.
Claim 2
Dependent Claim 60 words
A composite material, comprising short fibers, the material of each one of which is selected from the class made up of silicon carbide and silicon nitride, embedded in a matrix of metal, said metal being an alloy consisting essentially of between approximately 2% to approximately 6% of copper, between approximately 0.5% to approximately 3% of silicon, and remainder substantially aluminum.
Claim 3
Dependent Claim 18 words
A composite material according to claim 1, wherein substantially all said short fibers are composed of silicon carbide.
Claim 4
Dependent Claim 18 words
A composite material according to claim 1, wherein substantially all said short fibers are composed of silicon nitride.
Claim 5
Dependent Claim 33 words
A composite material according to claim 1, wherein a substantial proportion of said short fibers are composed of silicon carbide and a substantial proportion of said short fibers are composed of silicon nitride.
Claim 6
Dependent Claim 23 words
A composite material according to claim 1, wherein the fiber volume proportion of said short fibers is between approximately 5% and approximately 50%.
Claim 7
Dependent Claim 23 words
A composite material according to claim 1, wherein the fiber volume proportion of said short fibers is between approximately 5% and approximately 40%.

References Cited (Backward Citations)

US3180727A Cited
US3492119A Cited
US3600163A Cited
US4152149A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-01-18 1991-07-20 1992-01-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-01-18 1995-07-20 1996-01-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-01-18 1999-07-20 2000-01-19 $7700.00 Window Closed / Lapsed

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