采用机械球磨的方法制备W-1%La2O3(质量分数,下同)复合粉体,将粉体在1823 K烧结1 h制备出La2O3增强钨合金.对材料的显微组织结构和力学性能进行分析,结果表明:显微组织均匀,氧化镧主要以微小的颗粒分布在钨-钨界面上,钨晶粒尺寸约为10 μm～15μm;La2O3增强钨合金的抗弯强度值475 Mpa,在相同密度条件下,相对纯钨烧结体提高了35%.抗弯断口形貌表明,加入氧化镧颗粒后,钨合金的断裂方式发生了变化,由钨晶粒断裂为主转变为穿晶断裂和沿晶断裂的混合,同时分析讨论了氧化镧颗粒对合金组织性能的影响.
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