申文竹,王朋飞,杨忠波,杨芯艺,黄湛东,何俊瑶

• 1:西南石油大学新能源与材料学院
• 2:中国核动力研究设计院反应堆燃料及材料重点实验室

摘要(Abstract)：

采用电镀Cr+热浸镀Al两步法在Zr-4合金表面成功制备了Cr/Al复合涂层。采用电子背散射衍射(EBSD)、扫描电镜(SEM)、透射电镜(TEM)以及X射线衍射(XRD)等对涂层基体组织、表界面形貌、微观结构和物相进行了表征；采用划痕试验和压扁试验分析了涂层的结合性能；在90%湿度1300℃蒸汽条件下对涂层样品进行了高温氧化试验。结果表明：制备的涂层为纯Al层、不同原子比的Al_xCr_y合金过渡层和电镀Cr层的多层结构；740℃×3 min热浸镀制备的涂层致密、表面质量好，热浸镀过程对基体组织影响较小；制备的涂层在30%压下量压扁过程中未发生起皱、撕裂和剥落，涂层结合性能较好，其界面结合强度约90 N;在1300℃/90%湿度蒸汽氧化过程中，涂层表层生成了致密α-Al_2O_3氧化层阻碍了进一步氧化过程，涂层未出现横向裂纹、氧化分层以及基底氧化现象，制备的涂层显示出比锆合金更优的抗蒸汽氧化性能，其氧化增重仅为锆合金的20%左右。

关键词(KeyWords)： 锆合金包壳;Cr/Al复合涂层;电镀Cr+热浸镀Al;结合力;高温蒸汽氧化

Abstract:

Keywords:

基金项目(Foundation): 西南石油大学课外开放实验项目(2020KSZ05037)

作者(Author): 申文竹,王朋飞,杨忠波,杨芯艺,黄湛东,何俊瑶

DOI: 10.13289/j.issn.1009-6264.2021-0546

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