Paper Title:
In Situ High Resolution Transmission Electron Microscopy Studies of High Temperature Behavior of Surface Al2O3 Thin Layer on an AlN Particle
  Abstract

A high temperature HRTEM holder equipped with a W-coil heater was used to make insitu observation of high temperature behavior of Al2O3 very thin (about 1 nm in thickness) protective film on AlN particles. The film was used to prevent AlN particles from damages by moisture. Rapid melting and rapid solidification of very small Al2O3 particles of about 2 nm in diameter were found within about 0.2 seconds. Therefore we concluded that the Al2O3 protective film worked as the sintering additives in the high temperature heating process. In the present study, very small Al2O3 particles were identified by the space between observed lattice fringe images. It was found that a tilt boundary was instantaneously formed and annihilated in an Al2O3 particle. There was also evidence that showed the formation and annihilation of edge dislocations within seven seconds during sintering.

  Info
Periodical
Materials Science Forum (Volumes 675-677)
Edited by
Yi Tan and Dongying Ju
Pages
123-126
DOI
10.4028/www.scientific.net/MSF.675-677.123
Citation
H. Fukushima, M. Azuma, Y. Kanechika, "In Situ High Resolution Transmission Electron Microscopy Studies of High Temperature Behavior of Surface Al2O3 Thin Layer on an AlN Particle", Materials Science Forum, Vols. 675-677, pp. 123-126, 2011
Online since
February 2011
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$32.00
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