Skip to main content Accessibility help
×
Home

In situ TEM Straining of Nanograined Al Films Strengthened with Al2O3 Nanoparticles

  • Khalid Hattar (a1), Blythe G. Clark (a2), James A Knapp (a3), David M Follstaedt (a4) and I. M. Robertson (a5)...

Abstract

Growing interest in nanomaterials has raised many questions regarding the operating mechanisms active during the deformation and failure of nanoscale materials. To address this, a simple, effective in situ TEM straining technique was developed that provides direct detailed observations of the active deformation mechanisms at a length scale relevant to most nanomaterials. The capabilities of this new straining structure are highlighted with initial results in pulsed laser deposited (PLD) Al-Al2O3 thin films of uniform thickness. The Al-Al2O3 system was chosen for investigation, as the grain size can be tailored via deposition and annealing conditions and the active mechanisms in the binary system can be compared to previous studies in PLD Ni and evaporated Al films. PLD Al-Al2O3 free-standing films of various oxide concentrations and different thermal histories were produced and characterized in terms of average grain and particle sizes. Preliminary in situ TEM straining experiments show intergranular failure for films with 5 vol% Al2O3. Further work is in progress to explore and understand the active deformation and failure mechanisms, as well as the dependence of mechanisms on processing routes.

Copyright

References

Hide All
[1] Meyers, M. A. Mishra, A. and Benson, D. J. Progress in Materials Science 51 (2006) 427.
[2] Conrad, H., Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 35 A (2004) 2681.
[3] Wang, Y. Chen, M. Zhou, F. and Ma, E. Nature 419 (2002) 912.
[4] Hattar, K. and Han, D. M. F. J.H. Hearne, S. J. Saif, T. A. Robertson, I. M. in Fall MRS Conference 2005, edited by Paulo, I. M. R. Ferreira, J. Gerhard Dehm, Hiroyasu Saka (MRS Publication, Boston, MA, 2005).
[5] Fenske, J. A. Hattar, K. Briceno, M. and Robertson, I. M. Development of in in-situ TEM straining structures, (University of Illino Illinois, 2010).
[6] Hugo, R. C. Kung, H. Weertman, J. R. Mitra, R. Knapp, J. A. and Follstaedt, D. M. Acta Materialia 51 (2003) 1937.
[7] Field, R. D. and Papin, P. A. Ultramicroscopy 102 (2004) 23.
[8] Hattar, K. Thermal and mechanical stability of nanograined F FCC metals, in “Materials CC Science and Engineering” (University of Illinois, Urbana, 2009) p. 237.

Keywords

In situ TEM Straining of Nanograined Al Films Strengthened with Al2O3 Nanoparticles

  • Khalid Hattar (a1), Blythe G. Clark (a2), James A Knapp (a3), David M Follstaedt (a4) and I. M. Robertson (a5)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed