Injection molding of nano-structured90W-7Ni-3Fe alloy powder prepared by high energy ball milling

来源期刊：中国有色金属学报(英文版)2000年第6期

论文作者：范景莲 曲选辉 黄伯云

文章页码：794 - 797

Key words：tungsten heavy alloy; nano-structured powder; injection molding

Abstract: Blended elemental 90W-7Ni-3Fe (mass fraction, %) powder was mechanically alloyed in a planetary ball mill. Nano-crystalline grains were obtained after 10 h milling. The nano-structured powder was processed to full density by metal injection molding approach. Compacts from the optimal powder-binder mixture were studied for molding and sintering behaviors. Milling significantly increases the maximum powder loading and homogeneity of the feedstock, and enhances the sintering densification process. When solid-state-sintered at 1 350~1 450℃, the alloy shows very fine grains (~3μm), high tensile strength (>1 130 MPa) and almost no distortion.