Nanoscale mechanical surface properties of single crystalline martensitic Ni-Mn-Ga ferromagnetic shape memory alloys

被引：23
|
作者：
Jakob, A. M. [1 ,2 ]
Mueller, M. [1 ,2 ]
Rauschenbach, B. [1 ,3 ]
Mayr, S. G. [1 ,2 ,3 ]
机构：
[1] Leibniz Inst Oberflachenmodifizierung IOM, D-04318 Leipzig, Germany
[2] Univ Leipzig, Translat Zentrum Regenerat Med TRM, Leipzig, Germany
[3] Univ Leipzig, Fak Phys & Geowissensch, Leipzig, Germany
来源：
NEW JOURNAL OF PHYSICS | 2012年 / 14卷
关键词：
INDENTATION MODULUS; NI2MNGA; PSEUDOPOTENTIALS; MICROSCOPY; CONTACT;
D O I：
10.1088/1367-2630/14/3/033029
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Located beyond the resolution limit of nanoindentation, contact resonance atomic force microscopy (CR-AFM) is employed for nano-mechanical surface characterization of single crystalline 14M modulated martensitic Ni-Mn-Ga (NMG) thin films grown by magnetron sputter deposition on (001) MgO substrates. Comparing experimental indentation moduli-obtained with CR-AFM-with theoretical predictions based on density functional theory (DFT) indicates the central role of pseudo plasticity and inter-martensitic phase transitions. Spatially highly resolved mechanical imaging enables the visualization of twin boundaries and allows for the assessment of their impact on mechanical behavior at the nanoscale. The CR-AFM technique is also briefly reviewed. Its advantages and drawbacks are carefully addressed.
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收藏
页数：16
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