EP0375473A1 - Verfahren zur Herstellung von Verbundwerkstoff mit Metallmatrix und so hergestellter Verbundwerkstoff - Google Patents

Verfahren zur Herstellung von Verbundwerkstoff mit Metallmatrix und so hergestellter Verbundwerkstoff Download PDF

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Publication number
EP0375473A1
EP0375473A1 EP89402986A EP89402986A EP0375473A1 EP 0375473 A1 EP0375473 A1 EP 0375473A1 EP 89402986 A EP89402986 A EP 89402986A EP 89402986 A EP89402986 A EP 89402986A EP 0375473 A1 EP0375473 A1 EP 0375473A1
Authority
EP
European Patent Office
Prior art keywords
reinforcement
alloy
silica
magnesium
content
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89402986A
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English (en)
French (fr)
Other versions
EP0375473B1 (de
Inventor
Michel Barthole
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0375473A1 publication Critical patent/EP0375473A1/de
Application granted granted Critical
Publication of EP0375473B1 publication Critical patent/EP0375473B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
    • C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
    • C22C49/04—Light metals
    • C22C49/06—Aluminium

Definitions

  • the present invention essentially relates to a method of manufacturing a composite material with a metal matrix based on aluminum reinforced with ceramic fibers.
  • Composite materials consist, on the one hand, of a reinforcing material based on ceramic fibers such as, for example, alumina or alumina-silica fibers, which are entangled in the manner of a felt. whose cohesion is ensured by an inorganic binder, such as for example a silica binder, and on the other hand by an aluminum-based matrix and preferably constituted by an aluminum-silicon alloy.
  • the reinforcing material is impregnated under high pressure, for example using a hydraulic press, with the aforementioned aluminum-silicon alloy in the liquid state.
  • Composite materials of the above type are particularly useful in the automotive industry, for example at the level of the motor-propulsion unit of vehicles (connecting rods, pistons and cylinder head), in which it is obviously advantageous to use parts of reduced mass and having good static and dynamic characteristics at ambient temperature, and at operating temperatures, good resistance to thermal fatigue.
  • the present invention aims to fill this gap by providing such a method.
  • the subject of the invention is a method of manufacturing a composite material with a metallic matrix, consisting of a reinforcement based on alumina or alumina-silica fibers forming a felt whose cohesion is ensured by a silica binder, said reinforcement being impregnated under high pressure with an aluminum-liquid silicon alloy comprising magnesium, characterized in that said alloy comprises a magnesium content defined in particular as a function of the initial silica content of the reinforcement, in order to obtain a total reduction of silica without the formation of a residual magnesium-silicon compound at the matrix-reinforcement interface.
  • the magnesium content of the alloy is given by the following relationship: in which : Mg% is the mass content of magnesium; Vf is the volume reinforcement of the composite (fiber volume / composite volume); ⁇ f is the density of the fibers; s is the mass content of silica in the fibers; l is the mass content of binder of fiber felt; and ⁇ m is the density of the matrix.
  • the method of the invention consists in rendering the error by excess affecting, in the aforementioned formula, the magnesium content of the alloy given by this formula, below the threshold of appearance of the compound Mg2Si at level of the matrix-reinforcement interface.
  • impregnation of the reinforcement by the alloy is carried out at impregnation speeds between 5 and 50 mm s ⁇ 1 and with impregnation pressures between 30 and 150 MPa.
  • the composite material after impregnation, undergoes a heat treatment comprising dissolution, quenching and tempering.
  • the alloy used to manufacture the composite material is, according to a preferred embodiment, an aluminum-based alloy containing from 5 to 12% of silicon and from 3 to 5% of copper.
  • the invention also relates to a composite material obtained by the method meeting one and / or the other of the above characteristics, this composite material having optimal mechanical characteristics for use in the automotive industry for example.
  • the residual magnesium content in the matrix must be zero, so as to prevent any development of interface, when the material is subjected to high temperatures.
  • the magnesium content of the aluminum-silicon alloy must be limited in order to prevent the degradation of the alumina of the reinforcing fibers.
  • the magnesium content of the alloy must be optimized, so as to control the degree of interface bonds.
  • Step (1) without redox reaction, does not allow an interface bond.
  • Step (3) shows that there is formation at the interface of Mg2Si which considerably weakens the material.
  • step (2) is to be taken into consideration and according to the invention, the magnesium content in the alloy allowing the total reduction of the silica without the formation of a residual compound of Mg2Si at interface level, is given by the following formula: in which : Mg% is the mass content of magnesium; Vf is the volume reinforcement of the composite (fiber volume / composite volume); ⁇ f is the density of the fibers; s is the mass content of silica in the fibers; l is the mass content of binder of fiber felt; and ⁇ m is the density of the matrix.
  • Mg% is the mass content of magnesium
  • Vf is the volume reinforcement of the composite (fiber volume / composite volume)
  • ⁇ f is the density of the fibers
  • s is the mass content of silica in the fibers
  • l is the mass content of binder of fiber felt
  • ⁇ m is the density of the matrix.
  • This alloy is an aluminum-based alloy, the silicon content of which can be between 5% and 12%, and preferably equal to 5%, so as to produce a good foundry alloy.
  • This alloy also has a copper content of between 3 and 5%, which improves the mechanical temperature properties of the matrix.
  • magnesium content is calculated according to the above relationship established as a function of the fiber reinforcement and of the mineral binder used.
  • a composite material according to this invention is produced by impregnating the fiber reinforcement under high pressure with the aluminum-silicon alloy.
  • the impregnation is carried out at a reduced, constant and controlled speed which can be between 5 and 50 mm s ⁇ 1, while solidification is carried out under a high pressure which can be between 30 and 150 MPa .
  • the first phase of the impregnation can be carried out at a speed between 10 and 20 mm s ⁇ 1 and the second phase at a pressure between 100 and 150 MPa.
  • the composite material obtained can undergo a heat treatment advantageously comprising the following phases: - Dissolution intended for the homogenization of the copper content in the matrix, and for the migration of magnesium to the fiber to create the stage materialized by reaction (2) given above; - quenching, and - tempered to benefit from the structural hardening of the matrix linked to the presence of copper.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
EP19890402986 1988-11-21 1989-10-27 Verfahren zur Herstellung von Verbundwerkstoff mit Metallmatrix und so hergestellter Verbundwerkstoff Expired - Lifetime EP0375473B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8815113A FR2639360B1 (fr) 1988-11-21 1988-11-21 Procede de fabrication d'un materiau composite a matrice metallique, et materiau obtenu par ce procede
FR8815113 1988-11-21

Publications (2)

Publication Number Publication Date
EP0375473A1 true EP0375473A1 (de) 1990-06-27
EP0375473B1 EP0375473B1 (de) 1994-05-11

Family

ID=9372042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890402986 Expired - Lifetime EP0375473B1 (de) 1988-11-21 1989-10-27 Verfahren zur Herstellung von Verbundwerkstoff mit Metallmatrix und so hergestellter Verbundwerkstoff

Country Status (3)

Country Link
EP (1) EP0375473B1 (de)
DE (1) DE68915260T2 (de)
FR (1) FR2639360B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0501539A2 (de) * 1991-02-25 1992-09-02 General Motors Corporation Verbundmaterial mit Metallmatrix und Verfahren seiner Herstellung
EP0656428A1 (de) * 1993-12-04 1995-06-07 Ae Piston Products Limited Faserverstärkte Metallkolben

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0204319A1 (de) * 1985-06-04 1986-12-10 Toyota Jidosha Kabushiki Kaisha Verbundwerkstoff aus kurzen Aluminiumoxidfasern als Armierungsmaterial und eine kupfer- und magnesiumhaltige Aluminiumlegierung als Matrixmetall
EP0236729A2 (de) * 1986-02-06 1987-09-16 Toyota Jidosha Kabushiki Kaisha Verbundwerkstoff mit kurzen Siliziumnitridfasern des Typs der versetzungsfreien Einkristalle als Verstärkungselement und eine Matrix, bestehend aus einer Aluminiumlegierung mit geringem Kupfer- und Magnesiumgehalt
EP0291441A1 (de) * 1987-05-13 1988-11-17 Lanxide Technology Company, Lp. Verbundwerkstoffe mit Metallmatrix

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61538A (ja) * 1984-06-13 1986-01-06 Tokai Carbon Co Ltd ＳｉＣウイスカ−強化Ａｌ合金材の製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0204319A1 (de) * 1985-06-04 1986-12-10 Toyota Jidosha Kabushiki Kaisha Verbundwerkstoff aus kurzen Aluminiumoxidfasern als Armierungsmaterial und eine kupfer- und magnesiumhaltige Aluminiumlegierung als Matrixmetall
EP0236729A2 (de) * 1986-02-06 1987-09-16 Toyota Jidosha Kabushiki Kaisha Verbundwerkstoff mit kurzen Siliziumnitridfasern des Typs der versetzungsfreien Einkristalle als Verstärkungselement und eine Matrix, bestehend aus einer Aluminiumlegierung mit geringem Kupfer- und Magnesiumgehalt
EP0291441A1 (de) * 1987-05-13 1988-11-17 Lanxide Technology Company, Lp. Verbundwerkstoffe mit Metallmatrix

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WORLD PATENT INDEX, FILE SUPPLIER, résumé An-86-045994/07, Derwent Puglications Ltd, Londres, GB; & JP-A-61 000 538 (TOKAI CARBON K.K.) 06-01-1986 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0501539A2 (de) * 1991-02-25 1992-09-02 General Motors Corporation Verbundmaterial mit Metallmatrix und Verfahren seiner Herstellung
EP0501539A3 (en) * 1991-02-25 1993-09-08 General Motors Corporation Metal matrix composite composition and method
EP0656428A1 (de) * 1993-12-04 1995-06-07 Ae Piston Products Limited Faserverstärkte Metallkolben
EP0710729A1 (de) * 1993-12-04 1996-05-08 Federal-Mogul Bradford Limited Faserverstärkte Metallkolben

Also Published As

Publication number Publication date
DE68915260T2 (de) 1994-12-22
DE68915260D1 (de) 1994-06-16
FR2639360B1 (fr) 1991-03-15
EP0375473B1 (de) 1994-05-11
FR2639360A1 (fr) 1990-05-25

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