Abstract Oxide dispersion strengthening (ODS) tungsten alloys are highly desirable in irradiation applications. However, how to improve the properties of ODS-tungsten alloys efficiently has been worth studying for a long time. Here we report a nanostructuring approach that achieves W–La2O3 alloy with a high level of flexural strength and Vickers hardness at room temperature, which have the maximum value of 581 MPa and 703 Hv, respectively. This method named solution combustion synthesis (SCS) can generate 30 nm coating structures W–La2O3 composite powders by using Keggin-type structural polyoxometalates as raw materials in a fast and low-cost process. The composite powder can be fabricated to W–La2O3 alloy with an optimal microstructure of submicrometric W grains coexisting with nanometric oxide particles in the grain interior, and a stability interface structure of grain boundaries (GBs) by forming transition zones. The method can be used to prepare new ODS alloys with excellent properties in the future.

中文翻译：

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通过基于燃烧的创新方法设计的 W-La2O3 合金增强的机械性能和界面结构表征

摘要 氧化物弥散强化 (ODS) 钨合金在辐照应用中非常受欢迎。然而，如何有效提高ODS-钨合金的性能一直值得研究。在这里，我们报告了一种纳米结构方法，该方法在室温下实现了具有高水平弯曲强度和维氏硬度的 W-La2O3 合金，其最大值分别为 581 MPa 和 703 Hv。这种名为溶液燃烧合成 (SCS) 的方法可以通过使用 Keggin 型结构多金属氧酸盐作为原料，以快速、低成本的工艺生成 30 nm 涂层结构的 W-La2O3 复合粉末。复合粉末可以制成 W-La2O3 合金，具有亚微米 W 晶粒与晶粒内部纳米氧化物颗粒共存的最佳微观结构，以及通过形成过渡区的晶界（GBs）的稳定界面结构。该方法未来可用于制备性能优异的新型ODS合金。