FIBER REINFORCED METAL COMPOSITE MATERIAL

PURPOSE:To make it possible to set tensile strength and coefficient of heat expansion to predetermined values corresponding to a use without losing the strong points of a material, in the title composition material comprising an Al base metal matrix, by using a carbon fiber and a fiber having specific coefficient of heat expansion and tensile strength in a combined form. CONSTITUTION:In a fiber reinforced metal composite material wherein fibers are embedded in a metal matrix based on Al, the fibers consist of a carbon fiber and one or more of a fiber large in coefficient of heat expansion and having tensile strength of 200kg/mm. or more. As the latter fiber, for example, there are an SiC fiber and an Al2O3 fiber. By using this fiber, the various characteristics of the composite material is not uniquely determined by fiber content as shown in a case only comprising a carbon fiber and can be changed corresponding to a use so that coefficient of heat expansion is enhanced while tensile strength is kept same or an opposite case is performed.