粉末冶金技术2025，Vol.43Issue(5)：559-567,9.DOI:10.19591/j.cnki.cn11-1974/tf.2024060013
纳米W-30Cu-La2O3粉末的制备及烧结性能
Preparation and sintering properties of nanometer W-30Cu-La2O3 powders
摘要
Abstract
Tungsten copper oxide precursor powders were prepared by low temperature self-propagation method with tungstic acid,copper nitrate,and cerium nitrate hexahydrate as the raw materials,glycine as the fuel,ammonium nitrate as the accelerant.Nanometer W-30Cu-La2O3 composite powders were obtained by hydrogen reduction,and the W-30Cu-La2O3 alloys were prepared by sintering in hydrogen atmosphere.The effects of molar ratios of tungstate with glycine and ammonium nitrate on phase,morphology,and properties of the precursor powders and the reduced composite powders were investigated.The relative density,microstructure,and comprehensive properties of the W-30Cu-La2O3 alloys at different sintering temperatures were analyzed.The results show that the optimal molar ratio of tungstic acid with glycine and ammonium nitrate is 1:10 and 1:25,respectively.The powders have good uniformity,the specific surface area is 6.6271 m2·g-1,and the powder size is 100～200 nm.The optimal sintering temperature is 1350 ℃.The relative density,bending strength,Vickers hardness,and thermal expansion coefficient of the alloys sintered at 1350 ℃ is 99.0％,1205 MPa,HV 307,and 9.17×10-6 K-1,respectively.The microstructure is fine and uniform,and the fracture morphology is ductile fracture.关键词
低温自蔓燃/氢气还原/W-30Cu-La2O3合金/综合性能/微观组织Key words
low-temperature self-propagation/hydrogen gas reduction/W-30Cu-La2O3 alloys/comprehensive properties/microstructure分类
矿业与冶金引用本文复制引用
郭荣臻,郭世柏,官慧,钟韬,王佳鑫,黄英杰..纳米W-30Cu-La2O3粉末的制备及烧结性能[J].粉末冶金技术,2025,43(5):559-567,9.基金项目
湖南省教育厅重点项目(23A0379) （23A0379）
湖南省大学生创新创业一般项目(S202310534108) （S202310534108）
中国大学生创新创业项目(S202310534003S) （S202310534003S）
湖南省教研教改一般项目(HNJG-2021-0643) （HNJG-2021-0643）
