The amorphous Al<sub>2</sub>O<sub>3</sub> coatings were prepared on superalloy GH30 by dc reactive sputtering. Hot corrosion behaviors of the coated and uncoate
The experiments reveal the characteristics of stable damping in a multiphasic Al-Zn eutectoid alloy:(1)Thewhole damping(Q<sup>-1</sup>)has the same dependence on