| Ce对Fe-Ni膨胀合金凝固组织的影响 |
| |
| 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 |
| |
| 作者姓名： | 杨晓华 陈伟庆 郝占全 |
| |
| 作者单位： | 北京科技大学冶金与生态工程学院,北京,100083;北京矿冶研究总院金属材料研究所,北京,100044;北京科技大学冶金与生态工程学院,北京,100083 |
| |
| 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.
|
| 关 键 词： | 膨胀合金 铈 凝固组织 错配度 |
| 收稿时间： | 2008-08-15 |
Effect of Ce on the solidification structure of Fe-Ni base Invar expansion alloys |
| |
| 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 |
| |
| Authors: | YANG Xiao-hua CHEN Wei-qing HAO Zhan-quan |
| |
| 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. |
| |
| Keywords: | Invar alloy cerium solidification structure lattice misfit |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《工程科学学报》浏览原始摘要信息 |
|
点击此处可从《工程科学学报》下载全文 |
|
