Oxidation of alumina formers at 1173 K: effect of yttrium ion implantation and yttrium alloying addition
Oxidation of alumina formers at 1173 K: effect of yttrium ion implantation and yttrium alloying addition
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DOI：
10.1016/s0010-938x(02)00254-8
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发表时间：
2003-08
影响因子：
8.3
通讯作者：
R. Cueff;H. Buscail;E. Caudron;C. Issartel;F. Riffard
中科院分区：
文献类型：
--
作者：
R. Cueff;H. Buscail;E. Caudron;C. Issartel;F. Riffard
研究了三种Al 2 O3型FeCrAl合金在1173 K空气中等温暴露时的氧化行为。其中两个是Kanthal A1，不同之处在于是否存在植入钇。第三种，Kanthal AF含有钇的合金添加剂。动力学的结果表明，只有钇注入显着降低了在早期氧化阶段的氧化皮的生长速率。对于较长的氧化时间，活性元素显着影响氧化速率和氧化皮的组成，无论其在合金中的引入模式。原位X射线衍射表明，钇抑制了过渡型氧化铝的形成，促进了α-Al 2 O3的生长，从而导致保护性氧化膜的提前形成。
The oxidation behaviour of three alumina forming FeCrAl alloys has been investigated during isothermal exposures in air at 1173 K. Two of them were Kanthal A1, differing by the presence or not of implanted yttrium. The third one, Kanthal AF contains alloying additions of yttrium. Kinetic results indicate that only yttrium implantation significantly reduces the growth rate of the oxide scale during the early oxidation stage. For longer oxidation times, the reactive element markedly influences the oxidation rate and the composition of the oxide scale, whatever its introduction mode in the alloy. In situ X-ray diffraction shows that yttrium suppresses the formation of transition alumina and promotes the growth of α-Al2O3, thereby leading to the earlier formation of a protective oxide scale.