Long Term Stability of Ceramics in Liquid Lithium
Long Term Stability of Ceramics in Liquid Lithium
复制标题
陶瓷在液态锂中的长期稳定性
DOI：
10.1016/s0022-3115(00)00683-8
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发表时间：
2001
影响因子：
3.1
通讯作者：
J.R Di Stefano
中科院分区：
文献类型：
--
作者：
B. Pint;L. D. Chitwood;J.R Di Stefano
在400-800°C的1000 h等温试验中，将两种锂冷却聚变堆绝缘涂层的候选材料暴露于锂，以确定其最大相容温度。AlN +5 wt % Y2 O3的块状样品在600°C和更高温度下显示出显著的质量损失。当测试AlN +0.04wt%Y时，侵蚀量减少。在600°C下暴露的AlN +0.04重量% Y样品的俄歇光谱表征表明铝酸锂化合物形成的可能性。块状多晶CaO样品（纯度99.9%）在500°C以上显示出质量损失，这表明可能存在溶解问题，该问题在之前的短期筛选测试中没有观察到，并且根据热力学计算无法预测。用氧掺杂锂（在CaO的情况下）似乎不能有效地减少600°C下的质量损失。
Two candidate materials for insulating coatings in a lithium-cooled fusion reactor have been exposed to lithium in 1000 h isothermal tests from 400–800°C to determine their maximum compatibility temperature. Bulk samples of AlN +5 wt % Y2O3showed significant mass loss at 600°C and higher temperatures. The amount of attack was reduced when AlN +0.04 wt % Y was tested. Characterization by Auger spectroscopy of a AlN +0.04 wt % Y specimen exposed at 600°C indicated the possibility of a lithium aluminate compound formation. Bulk, polycrystalline specimens of CaO (99.9% purity) showed mass losses above 500°C indicating a possible dissolution problem that had not been observed in previous short-term screening tests and is not predicted based on thermodynamic calculations. Doping of the lithium with oxygen (in the case of CaO) did not appear effective in reducing the mass loss at 600°C.