Metal fusion bonding – Process – Plural joints
Patent
1986-07-08
1988-03-22
Godici, Nicholas P.
Metal fusion bonding
Process
Plural joints
228221, 228242, B23K 3102
Patent
active
047323140
DESCRIPTION:
BRIEF SUMMARY
Technical Field
The present invention relates to a method of manufacturing a reinforced metal-based composite material in which a fibrous inorganic reinforcing material such as carbon fiber, silicon carbide fiber, boron fiber, or silicon carbide whisker is dispersed as a reinforcing material in a metal matrix.
BACKGROUND ART
A hot press method is known as one of the conventional methods of manufacturing metal-based composite materials. According to these methods, a laminate of intermediates, called a preform, such as: (1) a green tape {fiber is placed on a foil layer (packing foil) of a matrix metal and is adhered and fixed with an acrylic or styrene resin}, (2) a sprayed tape {in item (1) above, the fiber is covered and fixed with a sprayed matrix metal in place of the resin}, or (3) an impregnated wire preform (a fier bundle is immersed in molten matrix metal and the fiber bundle is infiltrated with the molten metal) is heated and pressed to prepare a composite material.
This heating/pressing method includes the solid phase press method for processign in a solid phase region of the matrix metal, and the liquid phase press method for processing in a solid/liquid phase coexisting region or a liquid phase region higher than the solidus of the matrix metal. In the former method, the heating temperature is relatively low, and degradation of the fiber due to the interfacial reaction between the fiber and matrix metal during forming is small. However, in order to obtain a composite material, high pressure processes are normally required, resulting in high equipment and manufacturing costs. In the latter method, forming can be performed with low-pressure processes, and advantages in respect to the equipment and manufacturing costs are obtained. However, the heating temperature during forming is high, and degradation of the fiber by the interfacial reaction and formation of a brittle phase at the interface tend to occur. As a result, the obtained composite material tends to have poor mechanical properties.
It is, therefore, an object of the present invention to provide a method of manufacturing a composite material with excellent mechanical properties, in which the interfacial reaction caused in the conventional liquid phase press method is suppressed.
Disclosure of Invention
There is provided according to the present invention, a method of manufacturing a metal-based composite material, characterized in that a preform laminate consisting of a fibrous inorganic reinforcing material and aluminum, an aluminum alloy, magnesium or a magnesium alloy, or a sandwiched body of the reinforcing material and the metal sheets or foil layers is packed in a sealing metal container, the container is rapidly heated to a temperature higher than the solidus of the metal while it is maintained in a vacuum, and immediately thereafter the container is compressed by a platen heated to and kept at a temperature lower than the solidus of the metal, thereby preparing a composite material of the reinforcing material and the metal.
The fibrous inorganic material which can be used herein is not particularly limited. However, in general, fibrous inorganic materials having excellent heat resistance, strength, and wear resistance, such as carbon fiber, silicon carbide fiber, boron fiber, alumina fiber, graphite whisker, silicon carbide whisker, alumina whisker, or silicon nitride whisker can be used.
The base metal of the composite material is preferably aluminum, magnesium, an aluminum alloy, or a magnesium alloy. The type of aluminum alloy to be used is not particularly limited and any general aluminum alloy can be used. however, an aluminum alloy containing 80% by weight or more of A1 is particularly preferable. Examples of aluminum alloys include 2024, 3003, 5052, 7075, 7475, and the like. The type of magnesium alloy is not particularly limited, either, and any general magnesium alloy can be used. However, a magnesium alloy containing 80% by weight or more of Mg is particularly preferable. Examples of magnesium alloys include AZ31,
REFERENCES:
patent: 2947077 (1960-08-01), Lazarus
patent: 3419952 (1969-01-01), Carlson
patent: 3699623 (1972-10-01), Kreider
patent: 3729805 (1973-05-01), Mollica et al.
patent: 3748721 (1973-07-01), Alexander
patent: 3936277 (1976-02-01), Jackway et al.
patent: 4010884 (1977-03-01), Rothman
patent: 4260441 (1981-04-01), Prewo
Van Vlack, Elements of Materials Science and Engineering, pp. 316, 332 and 313, Addison-Wesley (1975).
Director--General of Agency of Industrial Science and Technology
Godici Nicholas P.
Skillman Karen
LandOfFree
Method of manufacturing a metal-based composite material does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of manufacturing a metal-based composite material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of manufacturing a metal-based composite material will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-437681