Hakaru Masumoto, Hideo Saito and Makoto Sugihara
The specific heat of the 7 alloys in α -solid solution range of copper and zinc system was measured in annealed and quenched states by an invers rate curve method. The specific heat-temperature curves of the alloys generally show a slight anomaly at about 200° to 260°; the anomaly is most conspicuous in the alloy containing 30.35 percent of zinc. And, while the temperatures of the knick points on the curves of the alloys containing less than 20.75 percent of zinc are almost constant, they become lower when the content of zinc is increased to more than 20.75 percent. This anomaly can be prevented by quenching from 500°. Thus, it has been concluded that the anomaly may be caused by the existence of the superstructure Cu3Zn in a short range and not by the change of the solubility of α -solid solution.
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