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供职机构:山东大学材料科学与工程学院材料液态结构及其遗传性教育部重点实验室更多>>
发文基金:国家自然科学基金更多>>
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Effects of cooling rate on thermal expansion of Cu_(49)Hf_(42)Al_9 metallic glass被引量:1
2011年
Effects of cooling rate on thermal expansion of Cu49Hf42Al9 metallic glass were studied. Five types of amorphous samples with different sizes were prepared in order to get a broad range of cooling rates (from 102 to 107 K/s). The average thermal expansion coefficients (αaver) of as-quenched samples range from 6.14×10-6 to 9.20×10-6 K-1. When the temperature is below the glass transformation temperature (Tg), αaver of as-quenched samples has a negative correlation with cooling rate; the values of αaver of annealed and crystallized samples are closed to each other. The results indicate that the amount and motion of free volume play important roles in thermal expansion of metallic glasses.
王莹莹边秀房贾然
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