Oxidation behavior characteristics of an aluminized Ni-based single crystal superalloy CM186LC between 900 °C and 1100 °C in air
Oxidation behavior characteristics of an aluminized Ni-based single crystal superalloy CM186LC between 900 °C and 1100 °C in air
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DOI：
10.1016/j.jiec.2013.02.039
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发表时间：
2013-11
影响因子：
6.1
通讯作者：
F. Latief;K. Kakehi;Yuma Tashiro
中科院分区：
文献类型：
--
作者：
F. Latief;K. Kakehi;Yuma Tashiro
研究了渗铝镍基单晶高温合金CM186LC在900℃~1100℃空气中的氧化行为。在900℃和1100℃下，氧化动力学近似遵循抛物线氧化规律，氧化初期生成的θ-Al_2O_3显著提高了氧化增重率。氧化100h后，由于θ-Al_2O_3向α-Al_2O_3的转变，增重率下降。500h高温氧化后的组织一般由氧化膜、涂层、互扩散区(IDZ)、衬底扩散区(SDZ)以及致密堆积的拓扑结构(TCP)和衬底组成。
Oxidation behavior of an aluminized Ni-based single crystal superalloy CM186LC was performed between 900 °C and 1100 °C in air. The oxidation kinetics approximately followed a parabolic oxidation law at 900 °C and 1100 °C. The mass gains were significantly increased owing to the formation ofθ-Al2O3during initial oxidation stage. After 100 h oxidation, the mass gain rates were then decreased due to the transformation fromθ-Al2O3toα-Al2O3. The microstructures after 500 h oxidation at all temperatures generally consisted of scale, coating layer, interdiffusion zone (IDZ), substrate diffusion zone (SDZ) accompanied with the topologically close-packed (TCP) and substrate.