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首页> 外文期刊>Materials and Corrosion >Influence of the mode of introduction of a reactive element on the high temperature oxidation behavior of an alumina-forming alloy Part II: Cyclic oxidation tests
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Influence of the mode of introduction of a reactive element on the high temperature oxidation behavior of an alumina-forming alloy Part II: Cyclic oxidation tests

机译：反应元素的引入方式对形成氧化铝的高温氧化行为的影响第二部分：循环氧化试验

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摘要

Several routes of yttrium introduction were applied to test the high temperature oxidation performance of a FeCrAl alloy. Isothermal oxidation tests were described in a previous paper (Part I of this paper in this journal, 2004, 55, 352). Cyclic oxidation tests were performed in air under atmospheric pressure on blank specimens, Y{sub}2O{sub}3 sol-gel coated-, Y{sub}2O{sub}3 metal-organic chemical vapor deposited (MOCVD)-, yttrium ion implanted-alloys, as well as on a steel containing 6.1 wt. % of yttrium as an alloying element. For the 20 hours cycles, all the samples, except FeCrAl-0.lY, exhibit weight losses after a few cycles, indicating drastic spallation of the oxide scales. The MOCVD coated specimen has the highest weight loss. The oxidation kinetics of the FeCrAl-0.1Y alloy obey a parabolic law, indicating that the alumina scale formed on its surface is protective even after more than 1200 hours of oxidation (> 50 cycles). The 100 hours cycle oxidation tests give similar results. The FeCrAl-0.1Y alloy exhibits the best oxidation behavior with very little spallation after more than 2000 hours (85 days) of oxidation at 1100 ℃ (20 cycles). Most of the other samples exhibit severe oxide scale spallation followed by an increase of their oxidation rate related to the formation of non-protective iron oxides.
机译：采用了几种引入钇的方法来测试FeCrAl合金的高温氧化性能。等温氧化测试已在先前的论文中进行了描述（本论文的第一部分，本期刊，2004，55，352）。在大气压力下于空气中对空白标本，Y {sub} 2O {sub} 3溶胶-凝胶涂覆的，Y {sub} 2O {sub} 3金属-有机化学气相沉积（MOCVD）-，钇的标本进行循环氧化测试离子注入合金以及含6.1 wt。钇作为合金元素的百分比。在20小时的循环中，除FeCrAl-0.lY外，所有样品在几个循环后均显示出重量损失，表明氧化物鳞片急剧剥落。 MOCVD涂层的样品具有最高的重量损失。 FeCrAl-0.1Y合金的氧化动力学服从抛物线定律，表明即使在经过1200个小时以上的氧化（> 50次循环）后，在其表面形成的氧化铝水垢也具有保护作用。 100小时循环氧化测试得出相似的结果。 FeCrAl-0.1Y合金在1100℃（20个循环）的氧化超过2000小时（85天）后表现出最佳的氧化行为，几乎没有剥落。其他大多数样品表现出严重的氧化皮剥落，随后其氧化速率增加，这与非保护性氧化铁的形成有关。

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