β Scribed by M.F. Denanot; J. Rabier
No coin nor oath required. For personal study only.
Aluminium nitride samples sintered with various Y20: concentrations are characterized by transmission electron microscopy. Topology and second phase characteristics at grain boundaries are investigated by X-ray and diffraction experiments. At low Y:O~ concentrations (up to 10%) second phases (mainly Y3AlsOt2 ) are located at pockets found at the function of several grains whereas for high Y20~ concentrations (20%) second phases are different and usually surround the AIN grains. Dislocations and planar defects are also found in AIN grains. The geometrical features and contrast analysis of these planar defects are explained by the incorporation of oxygen in the AlN matrix.
π SIMILAR VOLUMES
## Abstract Paired helical filaments (PHFs) are abnormal twisted filaments composed of hyperphosphorylated tau protein. They are found in Alzheimer's disease and other neurodegenerative disorders designated as tauopathies. They are a major component of intracellular inclusions known as neurofibrill