MAX相Ti_(3)SiC_(2)管材在高温高压水和过热蒸气中的腐蚀行为  

Corrosion Behavior of MAX Phase Ti_(3)SiC_(2)Tube in High-Temperature High-Pressure Water and Superheated Steam

作　　者：崔越 马海滨 李思功 胡丽娟[1] 张文怀 孙蓉蓉 任啟森 裴文 林雨晨 姚美意[1] Cui Yue;Ma Haibin;Li Sigong;Hu Lijuan;Zhang Wenhuai;Sun Rongrong;Ren Qisen;Pei Wen;Lin Yuchen;Yao Meiyi(Institute of Materials,Shanghai University,Shanghai 200072,China;China Nuclear Power Technology Research Institute,Shenzhen 518026,China)

机构地区：[1]上海大学材料研究所,上海200072 [2]中广核研究院有限公司,广东深圳518026

出　　处：《稀有金属材料与工程》2023年第3期982-988,共7页Rare Metal Materials and Engineering

基　　金：能源局重大专项(2015ZX06004-001)。

摘　　要：MAX相材料有作为事故容错燃料(accident tolerant fuel,ATF)包壳材料的潜力,为了全面了解MAX相材料在模拟正常工况下的腐蚀行为,使用基体为Ti_(3)SiC_(2)的MAX相陶瓷管材于400℃/10.3 MPa过热蒸气,360℃/18.6 MPa去离子水、3.5μL/L Li+1000μL/L B溶液和70μL/L Li溶液4种不同的水化学条件中进行腐蚀试验,采用XRD、SEM和FIB/TEM观察分析腐蚀前后样品的显微组织、晶体结构和成分。结果表明,Ti_(3)SiC_(2)管材在4种条件下的腐蚀速率均远高于参比Zr-4合金,腐蚀后主要检测到腐蚀产物TiO2,且其表面疏松多孔,未形成保护性的氧化膜。MAX phases have the potential to be used as accident tolerant fuel(ATF)cladding materials.In order to fully understand the corrosion behavior of MAX phases under the simulated normal service conditions,the corrosion test of MAX phase ceramic tube was carried out using the Ti_(3)SiC_(2)as matrix in superheated steam at 400℃/10.3 MPa,deionized water at 360℃/18.6 MPa,3.5μL/L Li+1000μL/L B solution and 70μL/L Li solution.The microstructure,crystal structure and composition of the samples before and after corrosion were observed by XRD,SEM and FIB/TEM.The results show that the corrosion rate s of Ti_(3)SiC_(2)under the four corrosion conditions are all much higher than that of reference Zr-4 alloy;TiO2 is characterized as the main corrosion product;the surface is porous and no protective oxide film is formed on the surface of Ti_(3)SiC_(2)tube.

关 键 词：ATF包壳材料 MAX相陶瓷 Ti_(3)SiC_(2) 腐蚀 

分 类 号：TL341[核科学技术—核技术及应用]