Composite material and method of manufacturing the same

摘要

In a composite material manufactured by connecting a sintered body to a surface of a metal substrate, the connection strength under a high temperature is increased, stress relaxation in the composite material is attained, and the strength, wear resistance and corrosion resistance are improved. The sintered body has a multilayer structure having layers with different compositions, i.e. compositions that vary or differ in a direction perpendicular to the connection surface, and the volume relation between the respective layers of the sintered body and the substrate is (substrate volumex0.2)>/=(sintered body volume/number of layers), while the thickness of each layer is at least 0.2 mm and not more than 5 mm.