Luo Dongwei, Yang Zhaoming, Yang Hengming, Chen Qingchun, Wang Yuan, Qiu Nan
Key Laboratory of Radiation Physics and Technology of Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China.
Materials (Basel). 2022 Jul 17;15(14):4975. doi: 10.3390/ma15144975.
High-entropy alloys (HEAs) have great potential as accident-tolerant fuel (ATF) cladding. Aluminum-forming duplex (BCC and FCC) stainless-steel (ADSS) is a candidate for ATF cladding, but the multiphase composition is detrimental to its corrosion resistance. In this paper, two single-phase HEAs were prepared by adjusting the content of each element in the ADSS alloy. The two HEAs were designed as Al(CrFeNi)(FCC) and Al(FeCrNi)(BCC). Their corrosion behavior under simulated pressurized water reactor (PWR) primary water was investigated. The corrosion products and corrosion mechanisms of these two HEAs were explored. The results show that the corrosion resistance of HEA alloys containing FCC is better than that of BCC and ADSS alloys. At the same time, the reason why the BCC structure composed of these four elements is not resistant to corrosion is revealed.
高熵合金（HEAs）作为事故容错燃料（ATF）包壳具有巨大潜力。形成铝的双相（体心立方和面心立方）不锈钢（ADSS）是ATF包壳的候选材料，但多相成分不利于其耐腐蚀性。本文通过调整ADSS合金中各元素的含量制备了两种单相高熵合金。这两种高熵合金设计为Al(CrFeNi)(面心立方)和Al(FeCrNi)(体心立方)。研究了它们在模拟压水堆（PWR）一回路水中的腐蚀行为。探索了这两种高熵合金的腐蚀产物和腐蚀机制。结果表明，含面心立方结构的高熵合金的耐腐蚀性优于体心立方结构合金和ADSS合金。同时，揭示了由这四种元素组成的体心立方结构不耐腐蚀的原因。
