METAL COMPOSITE MATERIAL WITH CONTROLLED THERMAL EXPANSION AND MANUFACTURING PROCESS THEREFOR

摘要

[Problem] To realize a metal-base composite material of which the thermal expansion can be controlled with high precision. [Solution] In one embodiment of the present invention, a metal composite material with controlled thermal expansion is provided by subjecting a mixed power obtained by mixing an antiperovskite manganese nitride powder which exhibits negative thermal expansion at least in a certain temperature range with a simple metal or metal alloy powder which can form a metal phase to heating in a hermetically sealed state to thus form a metal phase/ antiperovskite manganese nitride composite through sintering. Also provided is a manufacturing process for the metal composite material with controlled thermal expansion.