• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ISIJ international >In-situ Measurements of Isothermal Wüstite Transformation of Thermally Grown FeO Scale Formed on 0.048 mass% Fe by Synchrotron Radiation in Air
【24h】

In-situ Measurements of Isothermal Wüstite Transformation of Thermally Grown FeO Scale Formed on 0.048 mass% Fe by Synchrotron Radiation in Air

机译：同步辐射在空气中0.048质量％Fe上形成的热生长FeO鳞片的等温维斯特转变的原位测量

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Isothermal wüstite transformation of thermally-grown FeO scale formed on 0.048 mass% Fe at 948 K for 180 s and annealed at 673, 723 K, and 773 K in air was studied in situ by synchrotron radiation. Wüstite transformation initiated right at the beginning of isothermal heating, either by the formation of a new phase of meta-stable iron-rich wüstite (at 673 and 723 K) or by direct transformation to magnetite (at 773 K). At 673 K, iron-rich wüstite replaced the parent wüstite thoroughly, and then transformed to magnetite and metal iron. At 723 K, formation of the iron-rich wüstite started as well, but the reaction was interrupted and was replaced by a gradual enrichment reaction of iron in both the parent and the iron-rich wüstite phases. Consumption of the parent wüstite and generation of magnetite accompanied. Wüstite transformation to generate magnetite and metal iron at 673 and 723 K was only possible for the iron-rich wüstite. At 673 and 723 K, incubation time was needed to initiate transformation of meta-stable iron-rich wüstite to magnetite and metal iron. Reaction to form the iron-rich wüstite from the parent wüstite was much easier. Tranformation of the iron-rich wüstite to magnetite and metal iron is considered a root cause for the formation of the lamellar structure and the magnetite seam in the scale. The transformation can well be interpreted from the analogy of the formation of the pearlite structure in steels.
机译：通过同步辐射在原位研究了在0.0948质量％Fe在948 K下180 s形成的，在673、723 K和773 K空气中退火的热生长FeO鳞片的等温白钨转变。刚体转变在等温加热开始时就开始了，要么形成新的亚稳态富铁刚体（在673和723 K），要么直接转变成磁铁矿（在773 K）。在673 K时，富铁的辉石彻底替代了母辉石，然后转变为磁铁矿和金属铁。在723 K时，也开始形成富铁的辉石，但是该反应被中断，并被母体和富铁的辉石相中的铁逐渐富集反应所取代。伴随着母体白钨矿的消耗和磁铁矿的产生。仅在富铁的维斯特石中才可能发生在673 K和723 K处生成磁铁矿和金属铁的维斯特转变。在673和723 K时，需要一定的培养时间才能开始将亚稳态富铁铁素体转变为磁铁矿和金属铁。由母体维氏体形成富铁的维氏体的反应要容易得多。富铁的辉铁矿向磁铁矿和金属铁的转变被认为是形成鳞片状结构和磁铁矿接缝的根本原因。可以从类比钢中珠光体组织的形成中很好地解释这种转变。

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