Effect of crystal orientation relationship on inducement of anisotropy in HDDR-treated Nd-Fe-B alloys

Abstract

Using anisotropic sintered bodies, the crystal orientation relationship between the parent Nd/sub 2/Fe/sub 14/B phase and the disproportionated mixture during the hydrogenation disproportionation desorption recombination (HDDR) treatment was investigated by using X-ray diffraction and transmission electron microscopy. It can be concluded that retaining the crystallographic orientation relationship such as <111>/sub /spl alpha/-Fe/ and <111>(NdH/sub 2/)//<001>(Nd/sub 2/Fe/sub 14/B), [110]/sub /spl alpha/-Fe/ and [110](NdH/sub 2/)//[100](Nd/sub 2/Fe/sub 14/B) during HDDR treatment is important for the inducement of anisotropy.