Abstract Porous tungsten-rhenium powders with various compositions were prepared by a spray drying method combined with two-stage hydrogen reduction. Using the W-Re powders, W-Re alloy substrates were successfully fabricated by high temperature sintering under the protection of hydrogen. X-ray diffraction analysis, thermogravimetric analysis and temperature programmed reduction were carried out to study the reduction behavior of the tungsten and rhenium containing precursor powders prepared by spray drying. It reveals that the first stage reduction temperature has a significant impact on the microstructure of the W-Re powders. Rhenium in the mixed powder affects the reduction behavior of WO3. Properties of the W-Re alloy matrices, including relative density, open porosity, mechanical characteristics and electronic structures are also investigated. The first-principles calculation method proved that rhenium reduces the reduction barrier of WO3, and W-Re compounds obtained in this study are suggested to be a ductile material.

中文翻译：

---

铼钨化合物的还原、烧结和力学性能

摘要 采用喷雾干燥法结合两段氢还原法制备了不同成分的多孔钨铼粉体。使用W-Re粉末，在氢气保护下通过高温烧结成功制备了W-Re合金基板。通过X射线衍射分析、热重分析和程序升温还原，研究了喷雾干燥制备的含钨铼前驱体粉末的还原行为。结果表明，第一阶段还原温度对 W-Re 粉末的微观结构有显着影响。混合粉末中的铼会影响 WO3 的还原行为。还研究了 W-Re 合金基质的特性，包括相对密度、开孔率、机械特性和电子结构。