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Ce对Fe-Ni膨胀合金凝固组织的影响

杨晓华, 陈伟庆, 郝占全

杨晓华, 陈伟庆, 郝占全. Ce对Fe-Ni膨胀合金凝固组织的影响[J]. 工程科学学报, 2009, 31(7): 867-870. DOI: 10.13374/j.issn1001-053x.2009.07.034
引用本文: 杨晓华, 陈伟庆, 郝占全. Ce对Fe-Ni膨胀合金凝固组织的影响[J]. 工程科学学报, 2009, 31(7): 867-870. DOI: 10.13374/j.issn1001-053x.2009.07.034
YANG Xiao-hua, CHEN Wei-qing, HAO Zhan-quan. Effect of Ce on the solidification structure of Fe-Ni base Invar expansion alloys[J]. Chinese Journal of Engineering, 2009, 31(7): 867-870. DOI: 10.13374/j.issn1001-053x.2009.07.034
Citation: YANG Xiao-hua, CHEN Wei-qing, HAO Zhan-quan. Effect of Ce on the solidification structure of Fe-Ni base Invar expansion alloys[J]. Chinese Journal of Engineering, 2009, 31(7): 867-870. DOI: 10.13374/j.issn1001-053x.2009.07.034

Ce对Fe-Ni膨胀合金凝固组织的影响

详细信息
    作者简介:

    杨晓华(1969-),男,博士研究生,E-mail:yxiaohua@126.com;陈伟庆(1951-),男,教授,博士生导师

  • 分类号: TF777

Effect of Ce on the solidification structure of Fe-Ni base Invar expansion alloys

  • 摘要: Ce对Fe-Ni膨胀合金凝固组织的影响研究结果表明:经Ce处理后,Fe-Ni膨胀合金中形成了大量的高熔点Ce2O3包芯Al2O3复合物,尺寸约为2μm.错配度理论计算表明,Ce2O3的某些低指数面与Fe-Ni膨胀合金的低指数面具有7.1%的较低错配度,因此Ce2O3作为非均匀形核核心使膨胀合金凝固组织由完全的柱状晶变为完全的等轴晶组织.Ce在凝固组织的等轴晶晶界上以Ce2O3、Ce2O2S和CeS形式存在,具有阻止晶粒长大的作用.
    Abstract: An investigation on the effect of Ce on the solidification structure of an Fe-Ni base Invar expansion alloy shows that great amount of high-melting compounds (Ce2O3) with a size of 2.0 μm form in the alloy after Ce addition. Based on the theory of lattice misfit, the lattice misfit of low-index surfaces between Ce2O3 and the alloy is 7.1%, which is relatively low; with Ce2O3 as heterogeneous nucleation, therefore, the solidification structure of the alloy changes from complete dendrite grains to complete equiaxed grains. There are Ce2O3, Ce2O2S and CeS in the interface of equiaxed grains, which prevent from the growth of crystal grains.
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出版历程
  • 收稿日期:  2008-08-14
  • 网络出版日期:  2021-08-08
  • 刊出日期:  2009-07-24

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