中国钼业2026，Vol.50Issue(4)：91-98,8.DOI:10.13384/j.cnki.cmi.1006-2602.2026.04.014
热等离子制备钼-氧化钇纳米复合粉体及其烧结性能研究
Preparation of Mo-Y2O3 nanocomposite powders by thermal plasma and their sintering behavior
摘要
Abstract
Oxide dispersion strengthening is an effective way to improve the performance of Mo alloy.However,the segregation of oxide second phase at grain boundary is generally occurred in conventional preparation methods,which results in dissatisfied reinforcement effect on alloy.In this study,a novel thermal plasma strategy was developed to dissolve Y2 O3 into Mo nanocrystals,and further in situ precipitated out during sintering process.The influence of Y2O3 addition on the densification behavior of powder compact and micro-structure of obtained alloys were systematically investigated.The results reveal that the synergy of grain refinement and accelerated sin-tering were achieved for the Mo nanoparticles with 1.0 wt％Y2O3 introducing,and the alloys with relative density of 98％and grain size of 3.2 μm was obtained when sintering at 1 600 ℃ for 1 h.Importantly,hierarchical distribution of oxides was observed in Mo grains,and larger Y2O3 particles exhibit semi-coherent interface with the Mo matrix,while the locally presented small particles exhibit coherent structures due to the enrichment of Mo.Furthermore,the mechanical property investigation indicated that the Mo-1.0 wt％Y2O3 alloy possesses the highest compressive yield strength of 535 MPa,which was ascribed to the integrated effect of grain refinement and dispersion strengthening by the second-phase.关键词
等离子合成/钼合金/氧化钇/弥散强化/等级结构Key words
plasma synthesis/Mo alloy/yttria/dispersion strengthening/hierarchical structure分类
矿业与冶金引用本文复制引用
任佳文,高一杰,刘美君,柳书雅,崔明玉,胡鹏,王金淑..热等离子制备钼-氧化钇纳米复合粉体及其烧结性能研究[J].中国钼业,2026,50(4):91-98,8.基金项目
国家自然科学基金项目(编号:52174342) （编号:52174342）
