Author/Authors :
Stoichev، نويسنده , , N and Petrov، نويسنده , , K and Yaneva، نويسنده , , S and Kovachev، نويسنده , , Ognyan and Tzvetanova، نويسنده , , N، نويسنده ,
Abstract :
Structural changes in thermally treated microcrystalline Al–11 wt.%Si ribbon were studied by x-ray diffraction, differential scanning calorimetry, transmission electron microscopy and optical microscopy. Two successive types of microstructure development were found to appear in different temperature intervals: decomposition of supersaturated Al solid solution in range from 423 to 473 K, and structural coarsening of silicon particles between 723 and 800 K. The final microstructure of ribbon exhibits a nearly random distribution of silicon particles between 0.8 and 1.8 μm in diameter depending on time and temperature of annealing.
Keywords :
supersaturated solid solution , Hot extrusion , Microcrystalline Al–Si alloys , Growth of silicon particles
