Abstract A relatively simple approach based on mixing WC and iridium powders, followed by heating to 1300–1600 °C in inert atmosphere, was proposed to synthesize refractory intermetallics in the tungsten – iridium system. The peculiarities of the solid-state interaction in the WC-Ir system were studied within the 1000–1600 °C temperature range using a set of modern analytical techniques. Intensive solid-state interaction in the WC – Ir system starts at 1300 °C. It was stated that this interaction can be described by two stages in the 1300–1600 °C temperature range. The first stage is the formation of Ir-rich disordered WxIr1-x solid solution with constant average composition W0.265Ir0.735. The second stage is the interaction of the obtained WxIr1-x solid solution with residual component (Ir or WC) that leads to the shift of the WxIr1-x phase composition on one side or the other in dependence on type of residual component. No ordered intermetallic phases are formed in the 1300–1600 °C temperature range. In the course of the solid-state reaction, free carbon is released as graphite-like phase on the surface of the intermetallic product.

中文翻译：

---

WC与Ir固态相互作用过程中无序金属间相的形成

摘要 提出了一种相对简单的方法，即混合 WC 和铱粉，然后在惰性气氛中加热至 1300-1600 °C，以在钨-铱体系中合成难熔金属间化合物。使用一组现代分析技术在 1000-1600°C 温度范围内研究了 WC-Ir 系统中固态相互作用的特性。WC-Ir 系统中的强固态相互作用从 1300 °C 开始。据说这种相互作用可以通过 1300-1600°C 温度范围内的两个阶段来描述。第一阶段是形成具有恒定平均成分 W0.265Ir0.735 的富含 Ir 的无序 WxIr1-x 固溶体。第二阶段是获得的 WxIr1-x 固溶体与残余组分（Ir 或 WC）的相互作用，导致 WxIr1-x 相组成在一侧或另一侧发生变化，这取决于残余组分的类型。在 1300-1600 °C 的温度范围内没有形成有序的金属间相。在固态反应过程中，游离碳以类石墨相的形式释放到金属间化合物产品的表面。