Role of metal elements in oxidation resistance of high‐entropy diborides

• DOI: 10.1111/jace.20529
• Publication Date: 2025-04-05T11:25:32Z
• Authors: Yixiang Xu; Meiqi Dai; Du Hong; Yaran Niu; Yi Zeng; Bo Liang; Xuebin Zheng
• Keywords: High resistance

Abstract The research on the oxidant behavior of high‐entropy diborides (HEBs) is essential to facilitate their application in extreme environments. In this work, (Ti 1/3 Zr Hf )B 2 , Ta 1/4 and 1/5 15 W were used for comparative study reflect effects different elements oxidation resistance, ZrB was as a control. After oxidization at 1400°C 30 min, oxide layers thicknesses 380, 290, 250, 190, 200 µm, respectively. results showed that had best antioxidant performance due formation special dense layer. This attributed solid‐phase skeleton dominated by Hf, which good stability easy sintering. Liquid oxides Ti mobility but low viscosity. significantly improved viscosity, mass transfer effect, oxygen barrier ability composite liquid through synergistic effect. escape WO 3 destroyed scale lead poor resistance . structure can strengthen solid phases, not all elements, introduction destructive would reduce performance. work proposed an optimization mechanism HEBs.