Resumo

SANDOVAL JIMENEZ, A.; NEGRETE SANCHEZ, J.  e  TORRES VILLASENOR, G.. Cinética de la transformación de fase α + β, por microscopía electrónica de transmisión, de una aleación eutectoide Zn-Al solidificada rápidamente. Rev. mex. fis. [online]. 2006, vol.52, n.5, pp.433-437. ISSN 0035-001X.

By using transmission electron microscopy (TEM) technique was established the phase transformations kinetic of a Zn-Al eutectoid alloy solidified rapidly. The phase transformations experiments were realized and filmed in situ, at heating and cooling, into a transmission electron microscope. The kinetic was established considering only the Johnson-Mehl mathematical model, y = 1 - , where y is the fraction transformed, kis the rate constant reaction and n is the reaction order; y was determined by measuring area increase of the high temperature β phase, with regard to time, at video images of phase transformations; n and k are functions of y and t.

Palavras-chave : Kinetics; transmission electron microscopy; phase transformations; zinc-aluminium alloy; rapid solidification.