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OALib Journal期刊
ISSN: 2333-9721
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n18、zry--4和m5锆合金中氢的固溶度
Keywords: 材料科学基础学科,？氢的固溶度,？差示扫描量热法,？锆合金,？氢化物溶解和析出
Abstract:
？用差示扫描量热法(dsc)研究了含氢20--240？μg/g的n18、zry--4和m5三种锆合金加热时氢化物完全溶解时的固溶度(tssd)和冷却时氢化物开始析出时的固溶度(tssp)并使用tssd或tssp数据拟合出最优方程.结果表明,这些合金的tssd或tssp差别都很小,tssd与tssp之间都存在显著的滞后,是氢化物与基体间的体积错配应变所导致.根据冷却时dsc放热峰的宽度,计算出氢化物从过饱和固溶体中析出的平均速率,并拟合出最优方程.氢化物析出的活化能与氢在锆合金中的扩散激活能近似,表明氢化物的析出受到氢扩散的控制.
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