scholarly journals Time resolved in-situ synchrotron radiation diffraction investigation of grain-growth kinetics in magnetic nanocomposites

2007 ◽  
pp. 351-354
Keyword(s):  
Synchrotron Radiation ◽  
Grain Growth ◽  
Growth Kinetics ◽  
Magnetic Nanocomposites ◽  
Time Resolved ◽  
Synchrotron Radiation Diffraction ◽  
Grain Growth Kinetics

Grain-Growth Kinetics of Nanocrystalline Iron Studied In Situ by Synchrotron Real-Time X-ray Diffraction

2000 ◽  
Vol 104 (11) ◽  
pp. 2467-2476 ◽  
Author(s):  
H. Natter ◽  
M. Schmelzer ◽  
M.-S Löffler ◽  
C. E. Krill ◽  
A. Fitch ◽  
...  
Keyword(s):  
Real Time ◽  
Grain Growth ◽  
Growth Kinetics ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nanocrystalline Iron ◽  
Grain Growth Kinetics ◽  
Kinetics Of

scholarly journals In situ synchrotron radiation monitoring of phase transitions during microwave heating of Al–Cu–Fe alloys

2008 ◽  
Vol 23 (1) ◽  
pp. 170-175 ◽  
Author(s):  
Sébastien Vaucher ◽  
Radu Nicula ◽  
José-Manuel Català-Civera ◽  
Bernd Schmitt ◽  
Bruce Patterson
Keyword(s):  
Phase Transitions ◽  
Synchrotron Radiation ◽  
Microwave Heating ◽  
Nanocrystalline Alloy ◽  
Time Resolved ◽  
Microwave Exposure ◽  
Synchrotron Radiation Diffraction ◽  
Before And After ◽  
Fe Alloys

The effect of rapid microwave heating has so far been evaluated mainly by comparing the state of materials before and after microwave exposure. Yet, further progress critically depends on the ability to follow the evolution of materials during ultrafast heating in real time. We describe the first in situ time-resolved monitoring of solid-state phase transitions during microwave heating of metallic powders using wide-angle synchrotron radiation diffraction. Single-phase Al–Cu–Fe quasicrystal powders were obtained by microwave heating of nanocrystalline alloy precursors at 650 °C in <20 s.

scholarly journals An in situ transmission electron microscope investigation into grain growth and ordering of sputter-deposited nanocrystalline Ni3Al thin films

2002 ◽  
Vol 17 (8) ◽  
pp. 2085-2094 ◽  
Author(s):  
H. P. Ng ◽  
A. H. W. Ngan
Keyword(s):  
Electron Microscope ◽  
Grain Growth ◽  
Transmission Electron Microscope ◽  
Growth Kinetics ◽  
Abnormal Grain Growth ◽  
Face Centered Cubic ◽  
Transmission Electron ◽  
Sputter Deposited ◽  
Grain Growth Kinetics

The grain growth kinetics and ordering behavior of direct-current magnetron sputter-deposited Ni75at.%Al25at.% alloy films were investigated using in situ isothermal annealing in a transmission electron microscope. Both normal and abnormal grain growth modes were observed. The normal grain growth kinetics under isothermal heating from 300 to 700 °C were found to comply with the Burke law d = K/dn−1, where d is grain size and K and n are constants with respect to time. The grain boundary mobility parameter K was found to obey an Arrehnius rate law with an apparent activation energy of 1.6 eV, and n was found to increase gradually from 5.2 at 300 °C to 8.7 at 700 °C. Abnormal grain growth occurred at 500 °C or higher, and grain coalescence was identified as an important operative mechanism. It was also observed that the initially as-deposited state of the films was crystalline with a disordered face-centered-cubic structure, but ordering into the equilibrium L12 intermetallic structure followed from annealing at temperatures above approximately 500 °C.

Time resolvedin-situsynchrotron radiation diffraction investigation of grain-growth kinetics in magnetic nanocomposites

2007 ◽  
Vol 2007 (suppl_26) ◽  
pp. 351-354
Author(s):  
J. Bednarčik ◽  
R. Nicula ◽  
V. D. Cojocaru ◽  
M. Stir ◽  
E. Burkel
Keyword(s):  
Grain Growth ◽  
Growth Kinetics ◽  
Magnetic Nanocomposites ◽  
Grain Growth Kinetics

Grain growth kinetics, microstructure and magnetic properties of mechanically activated Nd1−xCaxMnO3±δ manganites

2021 ◽  
Vol 864 ◽  
pp. 158816
Author(s):  
Galina Kozhina ◽  
Valentin Mitrofanov ◽  
Olga Fedorova ◽  
Andrey Fetisov ◽  
Aidar Murzakaev ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Grain Growth ◽  
Growth Kinetics ◽  
Grain Growth Kinetics ◽  
Microstructure And Magnetic Properties
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