Teizo Aida1 and Kazunori Watanabe1
1Faculty of Engineering, Kumamoto University, Kumamoto
This study was carried out so as to obtain basic data on Zn-Al, Zn-Sb, Zn-Sn, Zn-Pb, Cd-Sb, Cd-Sn and Cd-Pb alloys which were heated at such high temperatures as their boiling points.
First, in accordance with the illustrating method described in the proceeding paper(1), the following were illustrated and calculated for the above alloys:
(1) Curves of evaporation rates W vs temperature T (over the range of about 700° ∼ 2000°K)
(2) Constants B and C of evaporation rates
(3) Latent heat of evaporation L0
(4) Curves of evaporation energy ε vs temperature T
Next, the curves of evaporation rates W vs temperature T for the above alloys were compared with the corresponding experimental curves or illustrated curves reported by Burmeister, Kubaschewski, Schneider and others.
The results of comparison showed that both curves are in relatively good agreement at evaporation rates of less than about 20 g/cm2·sec in corresponding to the vapor pressure of about 760 mmHg and in the composition ranges of more than (20 ∼ 30) wt% zinc in zinc binary alloys, and more than 30 wt% cadmium in cadmium binary alloys.
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