Texture and microstructure in Ni-W alloy tape manufactured by the powder metallurgy process

Abstract

Ni-3at.%W alloy tapes for YBCO coated conductor were fabricated by powder metallurgy process including powder compaction, cold isostatic pressing(CIP), cold rolling and annealing for recrystallization. The Ni-3at.%W tapes annealed in an atmosphere of 96%Ar and 4%H-2 mixing gas were characterized by X-ray pole figures, orientation distribution function(ODF) and optical microscopy(OM). The Ni-W alloy tapes were heat-treated at 700 similar to 1000 degrees C for the development of cube texture {001}< 100 >. The texture analysis indicated that as fabricated tapes have a sharp cube texture after annealing at 900 and 1000 degrees C. Also, thoroughly recrystallization takes place for the annealed tapes at the both temperatures and the average grain size of the two tapes is about the same, which is about 35 mu m.