• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials at High Temperatures >Effect of steam on high temperature oxidation behaviour of alumina-forming alloys
【24h】

Effect of steam on high temperature oxidation behaviour of alumina-forming alloys

机译：蒸汽对氧化铝形成合金高温氧化行为的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Alternative light water reactor fuel cladding materials are being investigated to replace Zircaloy for enhanced accident tolerance, which involves oxidation resistance to steam environments at >= 1200 degrees C for short times. As chromia-forming alloys and Ni-containing alloys are both undesirable for this application, the focus has been on FeCrAl, although NiAl was used to evaluate the effect of steam oxidation at 1600 degrees C for this study. For commercial and model FeCrAlY alloys, a critical Cr-Al composition was identified for 1 bar isothermal steam (100% H2O) oxidation resistance at 1200 degrees C, which differed for exposures in Ar-50% H2O at the same temperature. Alloys with lower Cr and Al contents were not able to form a protective alumina scale under these conditions. To simulate the accident scenario, exposures were also conducted in steam with the temperature rising 5 degrees C min(-1) to 1500 degrees C for the most oxidation resistant alloys. Using thermogravimetry, the maximum use temperature for candidate alloys was determined for different Cr and Al contents. Minor additions such as Y and Ti appeared to be beneficial for oxidation resistance. Similar to prior studies, alumina scales formed in air and in steam appeared to have only subtle differences in microstructure.
机译：正在研究替代轻水堆燃料包层材料来代替Zircaloy，以提高事故耐受性，这涉及短时间对> = 1200摄氏度的蒸汽环境具有抗氧化性。由于氧化铬形成合金和含镍合金都不适合该应用，因此本研究的重点是FeCrAl，尽管本研究使用NiAl评估了1600℃下蒸汽氧化的效果。对于商用和模型FeCrAlY合金，在1200摄氏度下1 bar等温蒸汽（100％H2O）的抗氧化性被确定为关键的Cr-Al组成，在相同温度下Ar-50％H2O的暴露量不同。在这些条件下，具有较低的Cr和Al含量的合金无法形成保护性氧化铝垢。为了模拟事故场景，对于大多数抗氧化合金，也都在蒸汽中进行了暴露，温度升高了5摄氏度min（-1）至1500摄氏度。使用热重分析法，针对不同的Cr和Al含量，确定了候选合金的最高使用温度。少量添加物（例如Y和Ti）似乎对抗氧化性有益。与先前的研究相似，在空气和蒸汽中形成的氧化铝水垢在微观结构上似乎只有细微的差别。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号