In this study, we investigated the oxidation resistivity and mechanical properties of NbMoTaW refractory high-entropy alloy (HEA)-based coatings at high temperatures. The coating layers were produced using mechanically alloyed HEA powders via Nano Particle Deposition System (NPDS). The as-milled powder is comprised of W-rich BCC1 and NbMoTa-rich BCC2 phases. After the deposition process, the W-rich BCC1 phase remained, while NbMoTa-rich BCC2 phases were transformed into complex NbMo-rich and Ta-rich oxides. Consequently, the NbMoTaW RHEA composite coating exhibited outstanding oxidation resistivity and high nanoindentation hardness at high temperatures compared to that of commercial coating materials, possibly owing to the combination of the W-rich solid solution phase and internal oxides.

在这项研究中，我们研究了 NbMoTaW 耐火高熵合金 (HEA) 基涂层在高温下的抗氧化性和机械性能。涂层是通过纳米粒子沉积系统 (NPDS) 使用机械合金化的 HEA 粉末制成的。研磨后的粉末由富含 W 的 BCC1 和富含 NbMoTa 的 BCC2 相组成。在沉积过程之后，富含 W 的 BCC1 相仍然存在，而富含 NbMoTa 的 BCC2 相则转化为复杂的富含 NbMo 和富含 Ta 的氧化物。因此，与商业涂层材料相比，NbMoTaW RHEA 复合涂层在高温下表现出出色的抗氧化性和高纳米压痕硬度，这可能是由于富含 W 的固溶体相和内部氧化物的结合。