Screening of the Fluorination Parameters to Improve the Oxidation Resistance of Ni-Base Superalloys at Elevated Temperatures
Screening of the Fluorination Parameters to Improve the Oxidation Resistance of Ni-Base Superalloys at Elevated Temperatures
复制标题
提高镍基高温合金高温氧化性能的氟化参数筛选
DOI：
10.1149/1.3315793
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
M. Schütze
中科院分区：
文献类型：
--
作者：
H.-E. Zschau;P. J. Masset;M. Schütze
利用卤素效应提高低铝镍基高温合金的抗氧化性能。通过增加金属表面上的Al活性，形成致密的保护性氧化铝氧化皮成为可能。热力学计算表明，在900 ℃和1200 ℃之间的温度下，合金IN 738存在正氟效应。离子注入用于筛选相应的氟浓度。氧化机制从向内生长的不连续氧化皮转变为致密的保护性氧化铝外层。确定了最佳注入参数。
The halogen effect was applied to improve the oxidation resistance of Ni-based superalloys with low aluminum content. By increasing the Al-activity on the metal surface the formation of a dense protective alumina scale becomes possible. Thermodynamic calculations show the existence of a positive fluorine effect for the alloy IN738 for temperatures between 900 C and 1200 C. Ion implantation was applied for the screening of the corresponding fluorine concentrations. The oxidation mechanism changed from an inward-growing discontinuous scale to a dense, protective outer alumina layer. The optimum implantation parameters were identified.