Thermodynamic stabilization of nanocrystalline aluminum
نویسندگان
چکیده
منابع مشابه
Deformation twinning in nanocrystalline aluminum.
We report transmission electron microscope observations that provide evidence of deformation twinning in plastically deformed nanocrystalline aluminum. The presence of these twins is directly related to the nanocrystalline structure, because they are not observed in coarse-grained pure aluminum. We propose a dislocation-based model to explain the preference for deformation twins and stacking fa...
متن کاملPhase transformations and thermodynamic properties of nanocrystalline FePt powders
The solid state reactions and structural evolution in nanocrystalline FePt powders during mechanical ball milling at 77 K and subsequent annealing have been investigated. Above 310 °C the formation of L10 FePt is observed. As the milling time increases, the enthalpy evolved during the transformations is reduced, whereas the corresponding activation energy increases. For accelerating the orderin...
متن کاملSurface Energies and Thermodynamic Phase Stability in Nanocrystalline Aluminas
Corundum, a-Al2O3, is the thermodynamically stable phase of coarsely crystalline aluminum oxide, but syntheses of nanocrystalline Al2O3 usually result in g-Al2O3. Adsorption microcalorimetry, thermogravimetric analyses, and Brunauer-Emmett-Teller adsorption experiments, coupled with recently reported high-temperature solution calorimetry data, prove that g-Al2O3 has a lower surface energy than ...
متن کاملThermodynamic potentials in closed and open nanocrystalline systems :
Submitted for the MAR08 Meeting of The American Physical Society Thermodynamic potentials in closed and open nanocrystalline systems: Si-Ge islands on Si(001). MARINA S. LEITE, Brazilian Synchrotron Light Source, Instituto de Fisica Gleb Wataghin UNICAMP, ANGELO MALACHIAS, Max-Planck Insitute for Solid State Research, STEFAN W. KYCIA, University of Guelph, TED I. KAMINS, R. STANLEY WILLIAMS, He...
متن کاملPhase stabilization in nitrogen-implanted nanocrystalline cubic zirconia.
The phase stability of nanocrystallites with metastable crystal structures under ambient conditions is usually attributed to their small grain size. It remains a challenging problem to maintain such phase integrity of these nanomaterials when their crystallite sizes become larger. Here we report an experimental-modelling approach to study the roles of nitrogen dopants in the formation and stabi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Materials Science
سال: 2021
ISSN: 0022-2461,1573-4803
DOI: 10.1007/s10853-021-06224-2