METHOD FOR PREPARING SINTERED PRODUCT, SINTERED PRODUCT AND MAGNETOSTRICTION MATERIAL

摘要

A method for preparing a sintered product, characterized in that an alloy powder having a composition represented by the formula 1: RTw, wherein R represents one or more rare earth metals, T represents one or more transition metals, and w is 1 < w < 4, is sintered in an atmosphere of a mixed gas from a hydrogen gas and an inert gas; and a method for preparing a sintered product, characterized in that an alloy powder having the above composition is sintered in a vacuum atmosphere or in an atmosphere comprising a gas having a molecular weight of 30 or less and then is subjected to a hot isotropic pressure treatment. The method allows the preparation of a sintered product being decreased in the deterioration of sintered product properties, such as magnetostriction characteristics, in a high temperature atmosphere, through the preparation of a sintered product such as ultra magnetostriction element having an increased density by the powder metallurgy method.