Additive manufacturing of metallic glasses and high-entropy alloys:Significance,unsettled issues,and future directions

As two kinds of well-known prominent high-performance alloys,metallic glasses(MGs)and high-entropy alloys(HEAs)have attracted increasing attention.Most of them contain multiple alloying components,demonstrate intriguing microstructures,and exhibit excellent properties;however,their unique performances are closely dependent on the fabrication process,although they are limited due to the need for rapid solidification during fabrication.On the other hand,additive manufacturing(AM)can be used to fabricate complex parts via rapid solidification,thus saving materials.These advantages provide AM with a great possibility to produce MG and HEA materials with tunable microstructures therefore properties,and corresponding parts with complex geometries,large dimensions,and more functions.This paper provides a comprehensive and systematic overview of the manufacturing and properties of MGs and HEAs using AM techniques.The correlation between MGs and HEAs with conventional manufacturing meth-ods and the difficulties encountered are retrospectively discussed.Afterward,this review specifically focuses on the recent research advances in MGs and HEAs fabricated using AM technologies.Then,various properties of the AM-fabricated MGs and HEAs are discussed.Finally,the remaining issues and potential solutions,challenges,and future directions on the AM of MGs and HEAs are also presented.

Fe基磁性金属微粉吸收剂发展现状及趋势

电磁波吸收材料在军工和民用领域都有非常广泛的应用,Fe基磁性金属微粉吸收剂可满足吸波材料向厚度薄、质量轻、频带宽、强吸收方向发展的需要,是目前电磁波吸收材料研究的重点。对Fe基磁性金属微粉吸收剂的研究重点内容进行了总结,综述了Fe基磁性金属微粉研究进展,包括Sendust合金、羰基铁、铁镍合金,并对金属微粉吸收剂未来的发展进行了展望。