EP1563111A1 - Magnesium material and use of the same - Google Patents

Magnesium material and use of the same

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Publication number
EP1563111A1
EP1563111A1 EP03769481A EP03769481A EP1563111A1 EP 1563111 A1 EP1563111 A1 EP 1563111A1 EP 03769481 A EP03769481 A EP 03769481A EP 03769481 A EP03769481 A EP 03769481A EP 1563111 A1 EP1563111 A1 EP 1563111A1
Authority
EP
European Patent Office
Prior art keywords
material according
thin layer
long
layer
matrix
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.)
Withdrawn
Application number
EP03769481A
Other languages
German (de)
French (fr)
Inventor
Bernd Eigenmann
Karl Rudolf
Manfred Schildknecht
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.)
Diehl BGT Defence GmbH and Co KG
Original Assignee
Diehl BGT Defence GmbH and Co KG
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 Diehl BGT Defence GmbH and Co KG filed Critical Diehl BGT Defence GmbH and Co KG
Publication of EP1563111A1 publication Critical patent/EP1563111A1/en
Withdrawn legal-status Critical Current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
    • C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
    • C22C47/02—Pretreatment of the fibres or filaments
    • C22C47/04—Pretreatment of the fibres or filaments by coating, e.g. with a protective or activated covering
    • 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
    • C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0085—Materials for constructing engines or their parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity

Definitions

  • the invention relates to a magnesium material (hereinafter called Mg material) according to the preamble of claim 1 and uses thereof.
  • the invention is therefore based on the object of providing a Mg material of the type mentioned at the outset, the strength of which transversely to the fiber direction is considerably improved, alloy elements of the matrix which form relatively coarse chemical reaction products being avoided on the fibers.
  • This object is achieved by the features of claim 1.
  • Preferred embodiments of the Mg material according to the invention are characterized in claims 2 to 8.
  • the long C fibers are provided with a thin layer which fulfills the following tasks:
  • At least one element of the layer material forms a thin, sufficiently homogeneous chemical reaction layer with the respective long carbon fiber;
  • the thin layer acts as a diffusion barrier in such a way that the local
  • At least one element of the material of the thin layer forms an intermetallic or intermediate connection or mixed crystal zone with the matrix.
  • the layer material is expediently formed by carbide formers.
  • carbide formers can be, for example, Al, Cr, Ti, Ta, Nb, Hf, Zr or alloys, for example based on Ni, which contain carbide formers.
  • the thin layer of the long C fibers can be produced by PVD (physical vapor depositon) or CVD (chemical vapor deposition).
  • the PVD process is preferably sputtering.
  • the CVD process can be a galvanic, wet chemical or electroless electrochemical process.
  • the thin layer of the long C fibers can have a thickness in the range between a few nm and a few ⁇ m.
  • the Mg material according to the invention can be made from a matrix with a C long fiber reinforcement for the production of pistons from
  • Creep resistance As is known, a slight increase in strength can be achieved if such Mg alloys are reinforced with short fibers or with suitable particles. However, this slight increase in strength is still not sufficient. Adequate strength, rigidity and creep resistance are only achieved with the Mg material according to the invention from a matrix with a C-long fiber reinforcement, the C-long fibers being provided with a thin layer of the type mentioned above. In the Mg material according to the invention, the interfacial strength between the C- Long fibers and the matrix optimized. A suitable design and fiber arrangement can save up to 30% in weight when using the Mg material according to the invention in pistons of internal combustion engines.
  • the composite material according to the invention consisting of the matrix and the C-long fiber reinforcement has strengths in the critical areas and directions of an internal combustion engine piston which are comparable to those of high-strength Al alloys.
  • the stiffness is even higher than the high-strength AI alloys.
  • Force introduction areas such as the bearing eyes for piston pins, grooves for piston rings and possibly piston crowns or combustion chambers can be formed as inserts, which in turn can be made of high-strength metal alloys or composite materials and which have a positive and / or form an integral bond.
  • the Mg material according to the invention made of a matrix with a C-long fiber reinforcement, the C-long fibers being provided with a thin layer, as has been described above, can also be used according to the invention for the production of connecting rods of internal combustion engines.
  • the currently Connecting rods used in internal combustion engines usually consist of steel or a Ti alloy. Attempts have also been made with GRP and CFRP connecting rods. Weight reduction compared to connecting rods made of steel or Ti alloys can be achieved by using Mg alloys. However, these do not have sufficient strength and rigidity. A slight increase in strength is possible if such Mg alloys are reinforced with short fibers or with particles. However, such an increase in strength is still not sufficient.
  • Adequate strength and rigidity can only be obtained by using the Mg material according to the invention made of a matrix with a C long fiber reinforcement with a thin layer, as has been described above, by means of which the interfacial strength between the matrix and the C long fibers is optimized.
  • a weight saving of up to 70% can be achieved with the Mg material according to the invention for connecting rods.
  • the Mg material according to the invention has strengths in the critical areas and directions of connecting rods which are comparable to those of high-strength Al alloys. The stiffness is even higher than that of Ti alloys.
  • Force introduction areas such as the bearing eyes for the piston pins and for the crank pins can be designed as inserts, which in turn can be made from higher-strength metal alloys or from composite materials. These inserts can form a positive and / or a material bond with the component made of the Mg material according to the invention.
  • the Mg material according to the invention can also be used according to the invention for the production of sabots for sub-caliber projectiles.
  • Known sabotages usually consist of high-strength AI alloys. Weight reduction can be achieved with such sabotages by using Mg alloys.
  • the known Mg alloys do not have sufficient mechanical strength. With short fiber or particle reinforcements, only small increases in strength are possible with known Mg alloys.
  • the Mg material according to the invention provides a remedy here, so that a weight saving of approximately 20 to 30% can be achieved by suitable design and fiber arrangement of the Mg material according to the invention.
  • the Mg composite material with C-long fiber reinforcement according to the invention with the thin coating, as described at the beginning, has strengths in critical areas and directions that the critical areas and directions strengths that are comparable to the strengths of high-strength Al alloys.
  • the stiffness is even higher than the high-strength AI alloys.
  • Force introduction areas such as > thread to the penetrator can be designed as inserts, which in turn can be made of high-strength metal alloys or composite materials and which can be positively and / or cohesively connected to the component, ie the sabot made of the Mg material according to the invention.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Abstract

The invention relates to a magnesium material consisting of a matrix with C long-fibre reinforcement. The aim of the invention is to improve the resistance of the material perpendicularly to the direction of the fibre. To this end, the C long fibres are provided with a thin layer. At least one element of the material of the thin layer forms a homogeneous chemical reaction layer with the respective C long fibre. The thin layer forms a diffusion barrier, such that the local formation of relatively coarse chemical reaction products formed by alloy elements of the matrix with the C long fibres and acting as crack initiators is prevented. The invention also relates to uses of the inventive magnesium material.

Description

Diehl Munitionssysteme GmbH & Co. KG.. Fischbachstr.16 . 90552 RöthenbachDiehl Munitionssysteme GmbH & Co. KG .. Fischbachstr. 16. 90552 Röthenbach
Magnesiumwerkstoff und Verwendungen desselbenMagnesium material and uses of the same
Die Erfindung betrifft einen Magnesiumwerkstoff (nachfolgend Mg-Werkstoff genannt) gemäß dem Oberbegriff des Anspruches 1 sowie Verwendungen desselben.The invention relates to a magnesium material (hereinafter called Mg material) according to the preamble of claim 1 and uses thereof.
Um Mg- erkstoffe mit einer C-Langfaser-Verstärkung technisch nutzbar zu machen, ist es notwendig, daß ihre Festigkeit quer zur Faserrichtung erheblich verbessert ist. Zu diesem Zwecke muß eine verbesserte Anbindung der Kohlenstoffasern (C-Fasern) an die Matrix erfolgen. Desweiteren muß vermieden werden, daß Legierungselemente der Matrix an den Fasern örtlich relativ grobe chemische Reaktionsprodukte bilden, weil solche Reaktionsprodukte als Riß- Starter wirken und die mechanische Festigkeit herabsetzen.In order to make Mg materials with a C long fiber reinforcement technically usable, it is necessary that their strength transversely to the fiber direction is considerably improved. For this purpose, an improved connection of the carbon fibers (C fibers) to the matrix must take place. Furthermore, it must be avoided that alloy elements of the matrix form relatively coarse chemical reaction products locally on the fibers, because such reaction products act as crack starters and reduce the mechanical strength.
Der Erfindung liegt deshalb die Aufgabe zugrunde, einen Mg-Werkstoff der eingangs genannten Art zu schaffen, dessen Festigkeit quer zur Faserrichtung erheblich verbessert ist, wobei an den Fasern relativ grobe chemische Reaktionsprodukte bildende Legierungselemente der Matrix vermieden werden. Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruches 1 gelöst. Bevorzugte Ausbildungen des erfindungsgemäßen Mg- Werkstoffes sind in den Ansprüchen 2 bis 8 gekennzeichnet.The invention is therefore based on the object of providing a Mg material of the type mentioned at the outset, the strength of which transversely to the fiber direction is considerably improved, alloy elements of the matrix which form relatively coarse chemical reaction products being avoided on the fibers. This object is achieved by the features of claim 1. Preferred embodiments of the Mg material according to the invention are characterized in claims 2 to 8.
Erfindungsgemäße Verwendungen des erfindungsgemäßen Mg- Werkstoffes sind in den Patentansprüchen 9 bis 11 beansprucht.Uses of the Mg material according to the invention are claimed in claims 9 to 11.
Erfindungsgemäß sind die C-Langfasern mit einer dünnen Schicht versehen, die die folgenden Aufgaben erfüllt:According to the invention, the long C fibers are provided with a thin layer which fulfills the following tasks:
Mindestens ein Element des Schichtwerkstoffes bildet mit der jeweiligen C- Langfaser eine dünne, ausreichend homogene chemische Reaktionsschicht;At least one element of the layer material forms a thin, sufficiently homogeneous chemical reaction layer with the respective long carbon fiber;
die dünne Schicht wirkt als Diffusionsbarriere in der Weise, daß die lokalethe thin layer acts as a diffusion barrier in such a way that the local
Bildung relativ grober chemischer Reaktionsprodukte von Legierungselementen der Matrix an den C-Langfasern verhindert wird; undFormation of relatively coarse chemical reaction products of alloy elements of the matrix on the long C fibers is prevented; and
mindestens ein Element des Werkstoffes der dünnen Schicht bildet eine intermetallische bzw. intermediäre Verbindung oder Mischkristallzone mit der Matrix.at least one element of the material of the thin layer forms an intermetallic or intermediate connection or mixed crystal zone with the matrix.
Bei dem erfindungsgemäßen Mg-Werkstoff ist der Schichtwerkstoff zweckmäßigerweise von Karbidbildnern gebildet. Hierbei kann es sich z.B. um AI, Cr, Ti, Ta, Nb, Hf, Zr oder um Legierungen beispielsweise auf Ni-Basis handeln, die Karbidbildner enthalten. Die dünne Schicht der C-Langfasern kann durch PVD-Verfahren (physical vapor depositon) oder durch CVD-Verfahren (chemical vapor deposition) hergestellt sein. Bei dem PVD-Verfahren handelt es sich vorzugsweise um Sputtern. Bei dem CVD-Verfahren kann es sich um ein galvanisches, naßchemisches oder stromlos elektrochemisches Verfahren handeln.In the Mg material according to the invention, the layer material is expediently formed by carbide formers. These can be, for example, Al, Cr, Ti, Ta, Nb, Hf, Zr or alloys, for example based on Ni, which contain carbide formers. The thin layer of the long C fibers can be produced by PVD (physical vapor depositon) or CVD (chemical vapor deposition). The PVD process is preferably sputtering. The CVD process can be a galvanic, wet chemical or electroless electrochemical process.
Die dünne Schicht der C-Langfasern kann eine Dicke im Bereich zwischen einigen nra und einigen μm aufweisen.The thin layer of the long C fibers can have a thickness in the range between a few nm and a few μm.
Der erfϊndungsgemäße Mg-Werkstoff weist den Vorteil einer hinreichendenThe Mg material according to the invention has the advantage of being sufficient
Querfestigkeit auf, während bekannte C-faserverstärkte Mg- Werkstoffe praktisch nicht eingesetzt werden, weil ihre Festigkeit quer zur Faserrichtung zu gering ist.Cross strength, while known C-fiber-reinforced Mg materials are practically not used because their strength across the grain is too low.
Erfindungsgemäß kann der erfindungsgemäße Mg-Werkstoff aus einer Matrix mit einer C-Langfaser- Verstärkung zur Herstellung von Kolben vonAccording to the invention, the Mg material according to the invention can be made from a matrix with a C long fiber reinforcement for the production of pistons from
Verbrennungsmotoren Verwendung finden. Herkömmliche Kolben von Verbrennungsmotoren bestehen üblicherweise aus Stahl oder einer AI-Legierung. Eine erwünschte Gewichtsreduktion im Vergleich zu Kolben aus Stahl oder aus AI-Legierungen ist durch die Verwendung von Mg-Legierungen realisierbar. Diese besitzen jedoch bislang keine ausreichende Festigkeit, Steifigkeit undFind internal combustion engines. Conventional pistons of internal combustion engines usually consist of steel or an Al alloy. A desired weight reduction in comparison to pistons made of steel or Al alloys can be achieved by using Mg alloys. However, these have not yet had sufficient strength, rigidity and
Kriechbeständigkeit. Eine geringe Festigkeitssteigerung ist bekanntermaßen erzielbar, wenn solche Mg-Legierungen mit Kurzfasem oder mit geeigneten Partikeln verstärkt sind. Auch diese geringe Festigkeitssteigerung ist jedoch noch nicht ausreichend. Eine ausreichende Festigkeit, Steifigkeit und Kriechbeständigkeit wird erst mit dem erfindungsgemäßen Mg-Werkstoff aus einer Matrix mit einer C-Langfaser- Verstärkung erreicht, wobei die C-Langfasern mit einer dünnen Schicht der oben genannten Art versehen sind. Bei dem erf ndungsgemäßen Mg-Werkstoff ist die Grenzflächenfestigkeit zwischen den C- Langfasern und der Matrix optimiert. Durch geeignete Gestaltung und Faseranordnung kann bei Verwendung des erfindungsgemäßen Mg- Werkstoffes bei Kolben von Verbrennungsmotoren eine Gewichtseinsparung von bis zu 30% erreicht werden. Der erfindungsgemäße Verbundwerkstoff aus der Matrix und der C-Langfaser- Verstärkung weist in den kritischen Bereichen und Richtungen eines Verbrennungsmotor-Kolbens Festigkeiten auf, die denen hochfester AI- Legierungen vergleichbar sind. Die Steifigkeiten sind sogar höher als die hochfester AI-Legierungen. Krafteinleitungsbereiche wie beispielsweise die Lageraugen für Kolbenbolzen, Nuten für Kolbenringe und gegebenenfalls Kolbenböden bzw. Brennkammern können als Inserts ausgebildet werden, die ihrerseits aus höherfesten Metallegierungen oder aus Verbundwerkstoffen hergestellt sein können und die mit dem Bauteil aus dem erfindungsgemäßen Mg- Werkstoff einen formschlüssigen und/oder einen stoffschlüssigen Verbund bilden.Creep resistance. As is known, a slight increase in strength can be achieved if such Mg alloys are reinforced with short fibers or with suitable particles. However, this slight increase in strength is still not sufficient. Adequate strength, rigidity and creep resistance are only achieved with the Mg material according to the invention from a matrix with a C-long fiber reinforcement, the C-long fibers being provided with a thin layer of the type mentioned above. In the Mg material according to the invention, the interfacial strength between the C- Long fibers and the matrix optimized. A suitable design and fiber arrangement can save up to 30% in weight when using the Mg material according to the invention in pistons of internal combustion engines. The composite material according to the invention consisting of the matrix and the C-long fiber reinforcement has strengths in the critical areas and directions of an internal combustion engine piston which are comparable to those of high-strength Al alloys. The stiffness is even higher than the high-strength AI alloys. Force introduction areas such as the bearing eyes for piston pins, grooves for piston rings and possibly piston crowns or combustion chambers can be formed as inserts, which in turn can be made of high-strength metal alloys or composite materials and which have a positive and / or form an integral bond.
Der erfindungsgemäße Mg-Werkstoff aus einer Matrix mit einer C-Langfaser- Verstärkung, wobei die C-Langfasern mit einer dünnen Schicht versehen sind, wie sie oben beschrieben worden ist, kann erfindungsgemäß auch zur Herstellung von Pleuelstangen von Verbrennungsmotoren Verwendung finden. Die z.Zt. in Verbrennungsmotoren eingesetzten Pleuelstangen bestehen üblicherweise aus Stahl oder aus einer Ti-Legierung. Es wurden auch bereits Versuche mit GFK- und CFK-Pleuelstangen unternommen. Eine Gewichtsreduktion im Vergleich zu Pleuelstangen aus Stahl oder Ti-Legierungen kann durch die Verwendung von Mg-Legierungen realisiert werden. Diese besitzen jedoch keine ausreichende Festigkeit und Steifigkeit. Eine geringe Festigkeitssteigerung ist möglich, wenn solche Mg-Legierungen mit Kurzfasern oder mit Partikeln verstärkt werden. Auch eine solche Festigkeitssteigerung ist jedoch noch nicht ausreichend. Eine ausreichende Festigkeit und Steifigkeit ergibt sich erst durch die Verwendung des erfindungsgemäßen Mg-Werkstoffs aus einer Matrix mit einer C-Langfaser- Verstärkung mit einer dünnen Schicht, wie sie oben beschrieben worden ist, durch die die Grenzflächenfestigkeit zwischen der Matrix und den C-Langfasern optimiert wird. Durch geeignete Gestaltung und Faseranordnung kann mit dem erfindungsgemäßen Mg-Werkstoff bei Pleuelstangen eine Gewichtseinsparung von bis zu 70% erreicht werden. Der erfindungsgemäße Mg-Werkstoff weist in den kritischen Bereichen und Richtungen von Pleuelstangen Festigkeiten auf, die denen von hochfesten AI-Legierungen vergleichbar sind. Die Steifigkeiten sind sogar höher als die von Ti-Legierungen. Krafteinleitungsbereiche wie die Lageraugen für die Kolbenbolzen und für die Kurbelzapfen können als Inserts ausgeführt werden, die ihrerseits aus höherfesten Metallegierungen oder aus Verbundwerkstoffen hergestellt sein können. Diese Inserts können mit dem Bauteil aus dem erfindungsgemäßen Mg-Werkstoff einen formschlüssigen und/oder einen stoffschlüssigen Verbund bilden.The Mg material according to the invention made of a matrix with a C-long fiber reinforcement, the C-long fibers being provided with a thin layer, as has been described above, can also be used according to the invention for the production of connecting rods of internal combustion engines. The currently Connecting rods used in internal combustion engines usually consist of steel or a Ti alloy. Attempts have also been made with GRP and CFRP connecting rods. Weight reduction compared to connecting rods made of steel or Ti alloys can be achieved by using Mg alloys. However, these do not have sufficient strength and rigidity. A slight increase in strength is possible if such Mg alloys are reinforced with short fibers or with particles. However, such an increase in strength is still not sufficient. Adequate strength and rigidity can only be obtained by using the Mg material according to the invention made of a matrix with a C long fiber reinforcement with a thin layer, as has been described above, by means of which the interfacial strength between the matrix and the C long fibers is optimized. With a suitable design and fiber arrangement, a weight saving of up to 70% can be achieved with the Mg material according to the invention for connecting rods. The Mg material according to the invention has strengths in the critical areas and directions of connecting rods which are comparable to those of high-strength Al alloys. The stiffness is even higher than that of Ti alloys. Force introduction areas such as the bearing eyes for the piston pins and for the crank pins can be designed as inserts, which in turn can be made from higher-strength metal alloys or from composite materials. These inserts can form a positive and / or a material bond with the component made of the Mg material according to the invention.
Der erfindungsgemäße Mg-Werkstoff kann erfindungsgemäß auch zur Herstellung von Treibspiegeln für unterkalibrige Geschosse Verwendung finden. Bekannte Treibspiegel bestehen üblicherweise aus hochfesten AI-Legierungen. Eine Gewichtsreduktion kann bei solchen Treibspiegeln durch die Verwendung von Mg-Legierungen erreicht werden. Die bekannten Mg-Legierungen besitzen jedoch keine ausreichende mechanische Festigkeit. Mit Kurzfaser- oder Partikelverstärkungen sind bei bekannten Mg-Legierungen nur geringe Festigkeitssteigerungen möglich. Hier schafft der erfindungsgemäße Mg-Werkstoff Abhilfe, so daß durch geeignete Gestaltung und Faseranordnung des erfindungsgemäßen Mg- Werkstoffes eine Gewichtseinsparung von ca. 20 bis 30% erreicht werden kann. Der erfindungsgemäße Mg- Verbundwerkstoff mit C- Langfaserverstärkung mit der dünnen Beschichtung, wie sie eingangs beschrieben worden ist, weist in kritischen Bereichen und Richtungen Festigkeiten auf, die den kritischen Bereichen und Richtungen Festigkeiten auf, die den Festigkeiten hochfester AI-Legierungen vergleichbar sind. Die Steifigkeiten sind sogar höher als die hochfester AI-Legierungen. Krafteinleitungsbereiche wie z.B. > Gewinde zum Penetrator können als Inserts gestaltet sein, die ihrerseits aus höherfesten Metallegierungen oder aus Verbundwerkstoffen hergestellt sein können und die mit dem Bauteil, d.h. dem Treibspiegel aus dem erfindungsgemäßen Mg- Werkstoff formschlüssig und/oder stoffschlüssig verbunden sein können. The Mg material according to the invention can also be used according to the invention for the production of sabots for sub-caliber projectiles. Known sabotages usually consist of high-strength AI alloys. Weight reduction can be achieved with such sabotages by using Mg alloys. The known Mg alloys, however, do not have sufficient mechanical strength. With short fiber or particle reinforcements, only small increases in strength are possible with known Mg alloys. The Mg material according to the invention provides a remedy here, so that a weight saving of approximately 20 to 30% can be achieved by suitable design and fiber arrangement of the Mg material according to the invention. The Mg composite material with C-long fiber reinforcement according to the invention with the thin coating, as described at the beginning, has strengths in critical areas and directions that the critical areas and directions strengths that are comparable to the strengths of high-strength Al alloys. The stiffness is even higher than the high-strength AI alloys. Force introduction areas such as > thread to the penetrator can be designed as inserts, which in turn can be made of high-strength metal alloys or composite materials and which can be positively and / or cohesively connected to the component, ie the sabot made of the Mg material according to the invention.

Claims

Ansprüche Expectations
1. Mg-Werkstoff aus einer Matrix mit einer C-Langfaser- Verstärkung, dadurch gekennzeichnet , daß die C-Langfasern mit einer dünnen Schicht versehen sind, wobei mindestens ein Element des Schichtwerkstoffes eine homogene chemische Reaktionsschicht mit der jeweiligen C-Langfaser büdet, und die dünne Schicht eine Diffusionsbarriere büdet, so daß die lokale Büdung relativ grober . chemischer Reaktionsprodukte von Legierungselementen aus der Matrix mit den C-Langfasern verhindert wird.1. Mg material from a matrix with a C-long fiber reinforcement, characterized in that the C-long fibers are provided with a thin layer, at least one element of the layer material forming a homogeneous chemical reaction layer with the respective C-long fiber, and the thin layer forms a diffusion barrier, so that the local exposure is relatively coarse. chemical reaction products of alloy elements from the matrix with the long C fibers is prevented.
2. Mg-Werkstoff nach Anspruch 1, dadurch gekennzeichnet , daß der Schichtwerkstoff der dünnen Schicht von Karbidbüdnem gebüdet ist.2. Mg material according to claim 1, characterized in that the layer material of the thin layer is carbide-bonded.
3. Mg-Werkstoff nach Anspruch 2 , dadurch gekennzeichnet , daß der Schichtwerkstoff der dünnen Schicht von AI, Cr, Ti, Ta, Nb, Hf, Zr gebüdet ist.3. Mg material according to claim 2, characterized in that the layer material of the thin layer of Al, Cr, Ti, Ta, Nb, Hf, Zr is bonded.
4. Mg-Werkstoff nach Anspruch 2, dadurch gekennzeichnet , daß der Schichtwerkstoff der dünnen Schicht von Legierungen auf Ni-Basis, die Karbidbüdner enthalten, gebüdet ist.4. Mg material according to claim 2, characterized in that the layer material of the thin layer of Ni-based alloys, which contain carbide alloys, is bonded.
5. Mg-Werkstoff nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet , daß die dünne Schicht durch PVD- oder durch CVD-Verfahren hergesteüt wird.5. Mg material according to one of claims 1 to 4, characterized in that the thin layer is produced by PVD or by CVD processes.
6. Mg-Werkstoff nach Anspruch 5 , dadurch gekennzeichnet , daß die dünne Schicht durch Sputtern auf die C-Langfasem aufgebracht wird.6. Mg material according to claim 5, characterized in that the thin layer is applied by sputtering onto the C-long fibers.
7. Mg-Werkstoff nach Anspruch 5 , dadurch gekennzeichnet , daß die dünne Schicht galvanisch, naßchemisch oder stromlos elektrochemisch auf die C-Langfasem aufgebracht wird.7. Mg material according to claim 5, characterized in that the thin layer is applied galvanically, wet-chemically or electrolessly electrochemically to the C-long fibers.
8. Mg-Werkstoff nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet , daß die dünne Schicht eine Dicke im Bereich zwischen einigen nm und einigen μm aufweist. 8. Mg material according to one of claims 1 to 7, characterized in that the thin layer has a thickness in the range between a few nm and a few microns.
9. Verwendung eines Mg-Werkstoffes nach einem der Ansprüche 1 bis 8 zur HersteUung von Kolben von Verbrennungsmotoren.9. Use of a Mg material according to one of claims 1 to 8 for the manufacture of pistons of internal combustion engines.
10. Verwendung eines Mg-Werkstoffes nach einem der Ansprüche 1 bis 8 zur HersteUung von Pleuelstangen von Verbrennungsmotoren.10. Use of a Mg material according to one of claims 1 to 8 for the manufacture of connecting rods of internal combustion engines.
11. Verwendung eines Mg-Werkstoffes nach einem der Ansprüche 1 bis 8 zur HersteUung von Treibspiegeln für unterkalibrige Geschosse. 11. Use of a Mg material according to one of claims 1 to 8 for the manufacture of sabots for sub-caliber projectiles.
EP03769481A 2002-11-02 2003-10-31 Magnesium material and use of the same Withdrawn EP1563111A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10251119 2002-11-02
DE2002151119 DE10251119A1 (en) 2002-11-02 2002-11-02 Magnesium material, used in production of I.C. engine pistons or connecting rods, comprises matrix with carbon longitudinal fiber reinforcement with thin layer
PCT/EP2003/012174 WO2004042103A1 (en) 2002-11-02 2003-10-31 Magnesium material and use of the same

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EP1563111A1 true EP1563111A1 (en) 2005-08-17

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EP03769481A Withdrawn EP1563111A1 (en) 2002-11-02 2003-10-31 Magnesium material and use of the same

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US (1) US20060051565A1 (en)
EP (1) EP1563111A1 (en)
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WO (1) WO2004042103A1 (en)

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FR2081237A1 (en) * 1970-03-20 1971-12-03 Onera (Off Nat Aerospatiale) Fibre impregnated composites - by forming a eutectic alloy in situ over the fibres
US4056874A (en) * 1976-05-13 1977-11-08 Celanese Corporation Process for the production of carbon fiber reinforced magnesium composite articles
US4223075A (en) * 1977-01-21 1980-09-16 The Aerospace Corporation Graphite fiber, metal matrix composite
JPS6169448A (en) * 1984-09-14 1986-04-10 工業技術院長 Carbon fiber reinforced metal and manufacture thereof
CA1285831C (en) * 1985-05-21 1991-07-09 Senichi Yamada Fibrous material for composite materials, fiber- reinforced metal produced therefrom, and process for producing same
US4778722A (en) * 1986-05-15 1988-10-18 Ube Industries, Ltd. Reinforcing fibers and composite materials reinforced with said fibers
US4961990A (en) * 1986-06-17 1990-10-09 Kabushiki Kaisha Toyota Chuo Kenkyusho Fibrous material for composite materials, fiber-reinforced composite materials produced therefrom, and process for producing same
EP0394463B1 (en) * 1988-08-12 1995-06-28 Ube Industries, Ltd. Carbide fibers with high strength and high modulus of elasticity and polymer composition used for their production
FR2695409B1 (en) * 1992-09-10 1994-11-25 Aerospatiale Composite material combining a magnesium alloy containing zirconium with a carbon reinforcement, and its manufacturing process.
US6245439B1 (en) * 1994-08-09 2001-06-12 Kabushiki Kaisha Toyoyta Chuo Kenkyusho composite material and method for the manufacture
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AU2003278169A1 (en) 2004-06-07
WO2004042103A1 (en) 2004-05-21
US20060051565A1 (en) 2006-03-09

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