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arXiv 1005.4873cond-mat.mtrl-sci
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Ni-Mn-In合金中局域组织畸变与马氏体相变的关系

Correlation between Local Structure Distortions and Martensitic Transformation in Ni-Mn-In alloys

D. N. Lobo, K. R. Priolkar, P. A. Bhobe, D. Krishnamurthy, S. Emura

摘要:

用扩展X射线吸收精细结构谱(EXAFS)研究了Ni_2Mn_1+xIn_1-x(x=0,0.3,0.4,0.5,0.6)中Mn含量增加引起的局域结构畸变及其对马氏体相变的影响。使用室温EXAFS在Ni和Mn的K-边缘在上述组合物中,相对于这些吸收原子的局部结构的变化进行了比较。可以看出,在表现出马氏体相变($x \ge 0.4$)的合金中,即使在奥氏体相中,Ni-In和Ni-Mn键长之间也存在显著差异,表明原子体积是诱导Ni-Mn-In Heusler合金中马氏体相变的主要因素。

英文摘要:

The local structural distortions arising as a consequence of increasing Mn content in Ni_2Mn_1+xIn_1-x (x=0, 0.3, 0.4, 0.5 and 0.6) and its effect on martensitic transformation have been studied using Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy. Using the room temperature EXAFS at the Ni and Mn K-edges in the above compositions, the changes associated with respect to the local structure of these absorbing atoms are compared. It is seen that in the alloys exhibiting martensitic transformation ($x \ge 0.4$) there is a significant difference between the Ni-In and Ni-Mn bond lengths even in the austenitic phase indicating atomic volume to be the main factor in inducing martensitic transformation in Ni-Mn-In Heusler alloys.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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