Crystallization Kinetics of Al-Fe and Al-Fe-Y Amorphous Alloys Produced by Mechanical Milling

• DOI: 10.1155/2016/1909108
• Publication Date: 2016-12-18T16:43:34Z
• Authors: Viet H. Nguyen; Oanh T. H. Nguyen; Dina V. Dudina; Vinh V. Le; Ji-Soon Kim
• Keywords: Exothermic reaction

In this work, the effect of a slight change in composition Al-Fe amorphous alloys (from Al 84 Fe 16 to 82 18 ) and substitution Y for (2 at.%) on their crystallization kinetics was studied. According X-ray diffraction analysis, powders , 2 with fully structure were formed after 100 h mechanical milling mixtures elemental powders. The behavior also studied by transmission electron microscopy. Upon heating up temperature first exothermic peak, α -Al crystals precipitated from matrix. During alloy, 6 intermetallic compound along crystals. Substitution at.% alloy made more complicated: -Al, Fe, 4 coexisted an phase. activation energies corresponding event calculated using Kissinger Ozawa methods. values obtained these two methods good agreement each other same trends changing observed. Avrami exponent<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mi>n</mml:mi></mml:mrow></mml:math>was determined Johnson-Mehl-Avrami equation showed that at stage is interface-controlled growth all three powder