Specific heat of superheated Al-10Sr alloy melts

来源期刊：中国有色金属学报(英文版)2001年第3期

论文作者：王艳 边秀房 张忠华 孙益民

文章页码：455 - 457

Key words：superheat; Al-10Sr alloy melts； specific heat； heating rate； quasi-polycrystalline modeling

Abstract: The specific heat of superheated Al-10Sr melts was determined at different heating rates between 1 K/min and 20 K/min using a differential scanning calorimeter(DSC). As a whole, the specific heat increases with increasing temperature. A hump is observed on the specific heat curve at the temperature corresponding to the phase boundary temperature dependent on heating rate. Moreover, the hump shifts to higher temperature in the measured temperature range from about 840 ℃ to 890℃ with increasing heating rate. At certain temperature in the higher superheated zone, the specific heat of the melt as a function of temperature shows a sharp rise . The result indicates that disorder zone fraction begins to increase while atom clusters fraction decreases at the breaking temperature.