The effect of niobium ion implantation on the oxidation behavior of aγ-TiAl-based intermetallic
The effect of niobium ion implantation on the oxidation behavior of aγ-TiAl-based intermetallic
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DOI：
10.1007/bf01046882
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发表时间：
1996-08
影响因子：
2.2
通讯作者：
M. F. Stroosnijder;N. Zheng;W. Quadakkers;R. Hofman;A. Gil;F. Lanza
中科院分区：
文献类型：
--
作者：
M. F. Stroosnijder;N. Zheng;W. Quadakkers;R. Hofman;A. Gil;F. Lanza
研究了铌离子注入（2× 1016 ions/cm ~ 2和1017 ions/cm ~ 2）对γ-TiAl基金属间化合物合金Ti− 48 Al −2Cr在800°C空气中氧化行为的影响。恒温研究暴露时间长达200小时和循环氧化试验长达800小时显示，低注入剂量的影响可以忽略不计。然而，一个显着的降低氧化速率观察到的材料注入1017 Nb离子/cm 2。抗氧化性的改善似乎类似于通过金属间化合物与几个原子百分比的铌合金化获得的改善。铌对TiAl基金属间化合物的抗氧化性的影响的可能机制进行了讨论，鉴于注入材料所获得的结果。
The effect of niobium implantation (2×1016and 1017ions/cm2) on the oxidation behavior of a γ-TiAl-based intermetallic alloy Ti−48Al−2Cr in air at 800°C has been examined. Isothermal studies with exposure times up to 200 hr and cyclic-oxidation tests up to 800 hr revealed a negligible effect for the low implantation dose. However, a remarkable decrease in oxidation rates was observed for the material implanted with 1017Nb ions/cm2. The improvement in the oxidation resistance appeared to be similar to that obtained by alloying of the intermetallic with a few atomic percent niobium. Possible mechanisms for the effect of niobium on the oxidation resistance of TiAl-base intermetallics are discussed in view of the results obtained for the implanted material.