INTERACTION AND ARRANGEMENT OF NITROGEN-ATOMS IN FCC GAMMA-IRON
INTERACTION AND ARRANGEMENT OF NITROGEN-ATOMS IN FCC GAMMA-IRON
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DOI：
10.1088/0953-8984/2/50/018
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发表时间：
1990-12-17
影响因子：
2.7
通讯作者：
INO, H
中科院分区：
文献类型：
--
作者：
ODA, K;UMEZU, K;INO, H
为了研究氮原子间的相互作用和面心立方晶格中八面体位置的分布，对Fe-N奥氏体进行了Fe-57的穆斯堡尔效应测量。 Fe-N奥氏体的光谱被分解成一个单重态γ-0和两组双峰γ-1和γ-2，这被确定为是由铁原子与最近邻位置的氮原子的不同构型引起的。 通过考虑吸收体厚度的影响，精确地确定了三个分量的分数强度。 结果表明，第一近邻氮原子间的相互作用是强排斥的，第二近邻氮原子间的相互作用是弱吸引的。
A Mossbauer effect measurement of Fe-57 has been performed for the Fe-N austenite in order to study the interaction between nitrogen atoms and the distribution among the octahedral sites of the FCC lattice. The spectrum for Fe-N austenite is decomposed into one singlet gamma-o and two sets of doublets gamma-1 and gamma-2 which are identified as being caused by iron atoms with different configurations of nitrogen atoms at the nearest-neighbour sites. The fractional intensities for the three components are precisely determined by taking into account the effect of the absorber thickness. It is concluded from the analysis that the interaction between the first-nearest-neighbour nitrogen atoms is strongly repulsive and that between the second nearest nitrogen is weakly attractive.