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- W2113509094 abstract "Amorphous Al85Ni10Y2.5La2.5 alloy powder with the particle size of −500 mesh was produced by gas atomization. Crystallization kinetics of the amorphous phase were studied using differential thermal analysis (DTA), X-ray diffraction (XRD), and scanning electron microscopy. Crystallization occurred in the temperature range 230–450°C in three exothermic reaction steps. The onset and peak temperatures for these reactions shifted toward higher temperatures when the heating rate was increased; this allowed the activation energies of the mechanisms controlling each step of the crystallization to be determined as 148, 336, and 274 kJ/mol, respectively. XRD and SEM analysis of the powder heated to different temperatures showed that precipitation of Al-based particles occurred during the first exothermic reaction, crystallization of the Al4La phase and an increase in the volume fraction of the Al-based phase took place during the second exothermic reaction, and development of the Al3Ni phase occurred during the third exothermic reaction. After annealing at 550°C, the powder consisted of Al-based matrix reinforced with very fine intermetallic particles of different morphologies. The mechanism of crystallization is discussed." @default.
- W2113509094 created "2016-06-24" @default.
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- W2113509094 date "2002-05-01" @default.
- W2113509094 modified "2023-09-26" @default.
- W2113509094 title "Crystallization kinetics of an amorphous Al85Ni10Y2.5La2.5 alloy" @default.
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- W2113509094 doi "https://doi.org/10.1016/s0925-8388(01)01909-0" @default.
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