Hydrogen trapping by yttrium in low temperature lithium
Hydrogen trapping by yttrium in low temperature lithium
复制标题
低温锂中钇捕获氢
DOI：
10.1016/0022-3115(84)90306-4
复制
发表时间：
1984
影响因子：
3.1
通讯作者：
H. Katsuta
中科院分区：
文献类型：
--
作者：
R. Anantatmula;H. Katsuta
在270°C下，在Berkeleton-7实验锂回路（7 BELL）中进行测试以确定包括钇的各种材料的锂相容性和杂质吸除能力。钇试样在液态锂中暴露总计3，718小时。X射线衍射和体相化学分析数据表明，钇在270°C下从液态锂中吸收氢并转化为二氢化钇（YH 2）。钇转化为YH 2导致试样脆化，随后碎裂成小块。基于钇转变为YH 2的平衡氢压力和Sievert关于氢与锂中氢平衡的关系的额外分析表明，钇的温度不能超过280°C以将锂中的氢浓度控制在低于lwt ppm。得出的结论是，在280°C或更低的温度下，海绵状钇是从聚变堆的锂包层中去除氢同位素的良好吸气剂，这与以前作者的结果非常一致。
A test to determine the lithium compatibility and impurity gettering capabilities of various materials including yttrium was performed in Beryllium-7 Experimental Lithium Loop (7BELL) at 270°C. Yttrium coupons were exposed in liquid lithium for a total of 3,718 hours. X-ray diffraction and bulk chemical analysis data indicated that yttrium absorbs hydrogen from liquid lithium at 270°C and transforms to yttrium dihydride (YH2). The transformation of yttrium to YH2resulted in embrittlement of the coupons and subsequent fragmentation to small pieces. Additional analysis, based on the equilibrium hydrogen pressures for the transition of yttrium to YH2, and Sievert's relationship for hydrogen in equilibrium with hydrogen in lithium, indicates that the temperature of yttrium cannot exceed 280°C to control the hydrogen concentration in lithium at below 1 wt ppm. It is concluded in general that yttrium in sponge form is a good getter for removal of hydrogen isotopes from the lithium blanket of a fusion reactor at or below 280°C, which is in excellent agreement with the results of previous authors.