Abstract
By adjusting the evaporation temperatures and changing the Mg/Zn atomic ratios (in the range of 0.5 to 4), various Mg-Zn binary alloys were fabricated usofing a novel technique named as gas-phase alloying. The theoretical calculation by the formula of saturated vapor pressure is to determine the evaporation temperature, which is 900-1200K for Mg and 700-1000K for Zn. The specimens were subjected to SEM, EDS, and Brinell hardness examinations. The results obtained show that, regardless of atomic ratios, microstructures include Mg7Zn3 particles and α-Mg matrix, the former is uniformly distributed into the latter. However, with increasing Mg/Zn atomic ratios, the microstructural transformation occurs from columnar precipitation to granular one.
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