Phase separation in ion bombarded FeNi Invar alloys
Phase separation in ion bombarded FeNi Invar alloys
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离子轰击 FeNi Invar 合金中的相分离
DOI：
10.1063/1.350325
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
J. A. H. Jornada
中科院分区：
文献类型：
--
作者：
M. R. Gallas;L. Amaral;J. A. H. Jornada
研究离子轰击对 30.6 和 39.5 at FeNi 合金相平衡和有序性的影响。 % Ni 进行。 FeNi 样品在不同剂量和温度下用 Ne、Ar 和 Kr 轰击，并使用 57Fe 的转换电子穆斯堡尔能谱 (CEMS) 技术进行分析。用 Ne 和 Ar 轰击的 Fe69.4Ni30.6 和 Fe60.5Ni39.5 合金的 CEMS 光谱的变化表明存在相分离，但没有有序的证据。 Kr 轰击不会产生任何变化，但是 39.5 at 的样本。 %已经表现出相分离的Ni在Kr照射后恢复到单相状态。我们的结果有力地证明了用较重离子轰击时普遍存在位移混合，而用较轻离子轰击时普遍存在辐射增强扩散。
Studies of the effects of ion bombardment on the phase equilibria and ordering of FeNi alloys with 30.6 and 39.5 at. % Ni were performed. The FeNi samples were bombarded with Ne, Ar, and Kr at different doses and temperatures, and analyzed using the conversion electron Mossbauer spectroscopy (CEMS) technique with 57Fe. The changes in the CEMS spectra of Fe69.4Ni30.6 and Fe60.5Ni39.5 alloys, bombarded with Ne and Ar, indicate a phase separation, but no evidence of ordering. The Kr bombardment does not produce any change, however samples of 39.5 at. % Ni already showing phase separation returned to the single phase state after Kr irradiation. Our results give strong evidences of a prevalence of displacement mixing for bombardment with heavier ions, and of radiation enhanced diffusion for bombardment with lighter ions.