| 陈紫阳,孟繁盛,陈爱英,瞿玉海,丁志义.合金化和相组成对FeCoCrNi基高熵合金1 000 ℃氧化性能研究[J].有色金属材料与工程,2025,46(6):77-87. |
| 合金化和相组成对FeCoCrNi基高熵合金1 000 ℃氧化性能研究 |
| Alloying and phase composition effects on the oxidation performance of FeCoCrNi-based High entropy alloys at 1 000 ℃ |
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| DOI：10.13258/j.cnki.nmme.20241023001 |
| 中文关键词: 高熵合金 高温抗氧化 氧化层 |
| 英文关键词:high-entropy alloy high temperature antioxidant oxide layer |
| 基金项目:国家自然科学基金资助项目(52303091)；上海市自然科学基金资助项目(20ZR1437500)；重庆市自然科学基金资助项目(CSTB2022NSCQ-MSX0389) |
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| 中文摘要: |
| 纳米析出强化型面心立方高熵合金因具有与先进镍基高温合金相似的双相结构，而表现出独特的高温特性，使其有望成为新一代耐热结构材料。采用真空电弧熔炼法、轧制与热处理工艺相结合的方式，制备了(FeCoCrNi)94AlxTi6-x（x=1，3，5，原子百分比）块体高熵合金。研究了该合金在静态空气中1 000 ℃恒温氧化120 h条件下的微观组织及氧化行为，发现高熵合金表面形成了由Cr2O3/Al2O3/TiO2及Ni、Co、Fe基尖晶石组成的氧化层。阐明了致密的Al2O3和Cr2O3层在1 000 ℃高温环境中发挥主要保护作用。FeCoCrNi基合金的优异高温抗氧化性能，为新型耐热金属材料的开发提供了技术支撑。 |
| 英文摘要: |
| The exceptional high-temperature properties of nano-precipitation strengthened face-centered cubic high-entropy alloys stem from their dual-phase (γ/γ') structure, which is similar to that of advanced nickel-based superalloys. These alloys are promising candidates for the next generation of heat-resistant structural materials. Bulk (FeCoCrNi)94AlxTi6-x (x=1, 3, 5, atomic percent) high-entropy alloys were fabricated via a combination of vacuum arc melting, rolling, and heat treatment. The microstructure and oxidation behaviour of the alloys were investigated during isothermal oxidation in static air at 1000 ℃ for 120 hours. An oxide layer composed of Cr2O3, Al2O3, TiO2, and Ni-Co-Fe-based spinels was observed on the alloy surface. The dense Al2O3 and Cr2O3 layers were found to provide significant protective effects at 1 000 ℃. The outstanding high-temperature oxidation resistance of FeCoCrNi-based alloys offers valuable technical support for the development of advanced heat-resistant metal materials. |
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