The Oxidation Behavior of Oxide-Dispersed β-NiAl: I. Short-Term Performance at 1200°C
The Oxidation Behavior of Oxide-Dispersed β-NiAl: I. Short-Term Performance at 1200°C
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DOI：
10.1023/a:1018894711276
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发表时间：
1998-06
影响因子：
2.2
通讯作者：
B. Pint
中科院分区：
文献类型：
--
作者：
B. Pint
采用粉末冶金技术在β-NiAl合金中加入氧化物分散体。在1200°C下循环20.2小时的过程中，通过添加Y2 O3和ZrO 2改善了外部α Al 3 O2的氧化皮粘附性。相对于未掺杂的铸造NiAl合金，没有观察到TiO 2和HfO 2添加剂的改善，观察到Al 2 O3和La 2 O3添加剂的负面影响。不同的添加剂对氧化皮形貌和1200°C等温生长速率也有不同的影响。将以氧化物分散体形式添加的掺杂剂的效果与类似的合金添加剂对β-NiAl的效果进行了比较。
Oxide dispersions were added to β-NiAlalloys using a powder-metallurgy technique. During 20,2-hr cycles at 1200°C, scale adhesion of theexternal alpha Al3O2was improvedby the addition of Y2O3and ZrO2. Relative to an undoped, castNiAl alloy, no improvement was observed forTiO2and HfO2additions andnegative effects were observed forAl2O3andLa2O3additions. The variouscation additions also had differing effects on the scale morphologyand isothermal growth rates at 1200°C. The effect ofthe dopants added as oxide dispersions was compared tosimilar alloy additions of the dopants to β-NiAl.