A novel ultrafine-grained Ni3Al with increased cyclic oxidation resistance

A novel ultrafine-grained Ni3Al with increased cyclic oxidation resistance
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一种具有增强循环氧化性能的新型超细晶 Ni3Al

DOI:
10.1016/j.corsci.2011.01.043
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发表时间:
2011-04
期刊:
影响因子:
8.3
通讯作者:
M. Li
M. Li
中科院分区:
材料科学1区
文献类型:
--
作者:
X. Peng;M. Li

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将电沉积Ni-Al复合材料在600°C下真空退火2 h制备出超细晶Ni 3Al。与电弧熔炼制备的成分相似但晶粒粗大的(CG)合金相比,UFG Ni 3Al在900°C下表现出显著提高的抗循环氧化性。微观结构的研究表明,CG合金生长的规模具有很高的敏感性屈曲和开裂,因为在规模/金属界面处形成大的空隙,但UFG合金生长的粘附规模,因为其典型的结构,防止在氧化过程中形成的界面空隙。
An ultrafine-grained (UFG) Ni3Al was fabricated by annealing an electrodeposited Ni–Al composite in vacuum at 600°C for 2h. The UFG Ni3Al, compared to a compositional-similar but coarse-grained (CG) alloy prepared by arc-melting, exhibited a greatly increased cyclic oxidation resistance at 900°C. Microstructural investigation showed that the CG alloy grew a scale with a high susceptibility to buckling and cracking because of the formation of large voids at the scale/metal interface, but that the UFG alloy grew an adherent scale, because its typical structure prevented the formation of the interface void during oxidation.
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