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By measurement of the specific heat, temperature coefficient of expansion, Young's modulus and yield point in Cu3Au alloys, it has been established that this alloy undergoes a phase transition between 550° and 600°C and possibly another one near 850°C. The temperature of the 550–600°C transition decreases sharply as the composition of the alloy deviates from Cu3Au.
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Kuczynski et al. (1956) studied this question.
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