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首页> 外文期刊>Chinese journal of aeronautics >Oxidation Properties in CO_2 of Inconel Alloy 600 Coated by Simultaneous Aluminizing-Chromizing Process
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Oxidation Properties in CO_2 of Inconel Alloy 600 Coated by Simultaneous Aluminizing-Chromizing Process

机译：同步渗铝-铬化工艺处理的Inconel 600合金的CO_2氧化性能

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摘要

In 600 alloy was coated with two different types of coatings, Cr-modified aluminide coating this is called aluminizing-chromizing and Y-doped chromium modified aluminide coating this is called aluminizing-chromizing-yttriumizing. Diffusion coating was carried at 1 050℃ for 8 h under Ar atmosphere by simultaneous aluminizing-chromizing process and by simultaneous aluminizing-chromizing-yttriumizing. Cyclic oxidation tests were conducted on the uncoated and on the coated Inconel 600 alloy in the temperature range 800-1 000℃ in CO_2 for 100 h at 10 h cycle.The results showed that the oxidation kinetics for uncoated Inconel 600 alloy in CO_2 is parabolic and the phases present are NiO, (Fe, Cr)_2O_3, NiFe_2O_4 and NiCrO_4. The oxidation kinetics for both coated systems in CO_2 was found to be parabolic and the value of k_P for both coated systems were found to be lower than that for uncoated Inconel 600 alloy. Oxide phases that formed on coated systems are Al_2O_3 and NiCrO_4. The role of yttrium can be attributed to its ability to improve the adherence of the oxide scale.
机译：在600合金中，镀有两种不同类型的涂层，Cr改性的铝化物涂层称为渗铝铬化，Y掺杂的铬改性的铝化物涂层称为渗铝铬化。通过同时渗铝-铬化处理和同时渗铝-铬化-钇化，在Ar气氛下于1050℃进行扩散涂层8h。在10小时的循环中，在CO_2中800〜1000℃的温度下，对未涂层和涂层的Inconel 600合金进行了100h的循环氧化试验。结果表明，未涂层的Inconel 600合金在CO_2中的氧化动力学是抛物线的。存在的相为NiO，（Fe，Cr）_2O_3，NiFe_2O_4和NiCrO_4。发现两个涂层体系在CO_2中的氧化动力学都是抛物线的，并且两个涂层体系的k_P值都低于未涂层的Inconel 600合金。在涂层系统上形成的氧化物相为Al_2O_3和NiCrO_4。钇的作用可归因于其改善氧化物垢附着力的能力。

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