| 摘要 |
PURPOSE:To easily produce an untra-magnetostrictive alloy having oriented crystal or single crystal, etc., by sintering and integrating an alloy powder having a (near-) stoichiometric composition of an intermetallic compound of rare earth element and transition metal element. CONSTITUTION:An ingot having an alloy composition of (Tb0.5Dy0.5)(Fe0.9 Mn0.1)1.999 by atomic ratio as a stoichimetric composition of an intermetallic compound of Laves type, etc., of rare earth element, such as Tb and Dy, and transition metal element, such as Fe and Mn, or a composition in the vicinity of the above is prepared. This ingot is crushed in an Ar gas flow and subjected to jet mill crushing in a nitrogen jet stream, and the resulting pulverized powder is formed into a green compact by using dies and punches made of stainless steel while applying the prescribed magnetic field. This green compact is sintered in an Ar atmosphere at about 1210 deg.C for about 1hr, by which the ultra- magnetostrictive alloy having a polycrystal oriented structure with uniform crystal orientation can be produced. Further, by controlling the conditions, a single crystal or macrocrystalline grain close to the single crystal can be obtained. |
