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Molecular Dynamics Study of the Microstructure of Near Grain Boundary Distortion Region in Small Grain Nano-NiAl Alloy
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| WANG Jing-Yang1,3;WANG Xiao-Wei1,3;J. Rifkin2;LI Dou-Xing3 |
| 1International Centre for Materials Physics, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
2Institute of Materials Science, University of Connecticut, USA
3Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
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| Cite this article: |
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WANG Jing-Yang, WANG Xiao-Wei, J. Rifkin et al 2001 Chin. Phys. Lett. 18 1386-1388 |
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Abstract Using the molecular dynamics simulation method, the microstructure of the distortion region near the curved amorphous-like grain boundary in nano-NiAl alloy is studied. The results show that due to the internal elastic force of high energy grain boundary, a distortion layer exists between grain and grain boundary. The lattice expansion and the decreasing structure factor are observed in this region. Stacking fault in samples with grain size 3.8 nm is clearly observed across the distortion region at the site very close to grain. The influences of different grain sizes on average distortion degree and volume fractions of the distortion region, grain and grain boundary are also discussed.
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| Keywords:
62.25.+g
68.35.-p
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Published: 01 October 2001
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| PACS: |
62.25.+g
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68.35.-p
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(Solid surfaces and solid-solid interfaces: structure and energetics)
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