The Process of Glass Formation by Mechanical Alloying

THM picture of a mechanically cu-deformctl ami partially reacted Ni Zr composite 11.261 

40 nm in diameter, a result in good agreement with the observed Ms reduction of 3.8% and 5% for Ni50Zr50 and Ni30Zr70 after 2h of milling. 

The amorphization reaction slows down as the thickness of the amorphous interlayer increases, and the intermetallic NiZr phase forms when the amorphous interlayer exceeds a critical thickness d rit. Due to the much slower diffusion in the intermetallic phase, the reaction rate decreases. The second increase above 350°C is attributed to the reaction kinetics accelerated again at higher temperatures. Besides the growing NiZr phase, the intermetallic NiZr2 phase forms. The consumption of Ni leads to the second decrease of the reaction 

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