Influences of Yttrium on Cyclic Oxidation Behavior of Fe-Cr-Al Alloy

被引：0
|
作者：
辛丽
李美栓
钱余海
李铁藩
机构：
来源：
Journal of Rare Earths | 2001年 / 01期
关键词：
rare earths; yttrium; Fe Cr Al alloy; cyclic oxidation;
D O I：
暂无
中图分类号：
TG146 [有色金属及其合金];
学科分类号：
080502 ;
摘要：
The 1100 ℃ cyclic oxidation behavior of Fe 23Cr 5Al alloy modified by yttrium was studied. Yttrium was added to this alloy in the form of (1) metallic addition, (2) yttrium oxide dispersion and (3) ion implantation. Cracking and spalling occurred on the convoluted scale formed on Y free alloy and the substrate was exposed. A flat dense scale without spallation was formed on the yttrium alloying addition or yttrium oxide dispersion alloy. Spallation mainly occurred between two layers of the scale on the 1×10 17 Y ions/cm 2 implanted alloy. The results indicate the main reason that the adhesion of alumina scale was improved by yttrium addition lies in that yttrium is liable to form a stable yttrium sulfide with sulfur in the alloy and prevent sulfur interface segregation. Another reason is that the growth mechanism of alumina scale was changed by yttrium addition.
引用
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页码：53 / 56
页数：4
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