Hydrogen solubility limits in α- and β-zirconium
Hydrogen solubility limits in α- and β-zirconium
复制标题
氢在 α- 和 β- 锆中的溶解度极限
DOI：
10.1016/s0925-8388(96)02947-7
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发表时间：
1997
影响因子：
6.2
通讯作者：
V. C. Ling
中科院分区：
文献类型：
--
作者：
D. Khatamian;V. C. Ling
纯锆和Zr-20 Nb合金试样在673 K下从气相充入不同浓度的氢。Zr-20 Nb合金在充氢前后分别在1123 K真空退火1 h，然后在30 min内冷却至室温，得到β-Zr组织。部分样品在773 K下退火500 h后完全转变为（α-Zr+β-Nb）相。使用差示扫描量热法和氢浓度使用热真空提取质谱法的试样进行了分析的氢化物转变温度。发现纯锆的氢溶解度极限与先前报道的值吻合得很好。在β-Zr中发现的溶解度极限比在α-Zr中发现的溶解度极限高约两个数量级，并且在时效Zr-20 Nb合金中发现的溶解度极限非常接近于在α-Zr中发现的溶解度极限。
Specimens of pure zirconium and Zr–20Nb alloy were charged to different hydrogen concentrations from the gas phase at 673 K. Before and after charging with hydrogen, the Zr–20Nb specimens were annealed in vacuum at 1123 K for 1 h and cooled to room temperature within about 30 min to produce a β-Zr structure. Some of these specimens were annealed further at 773 K for about 500 h to completely transform them to (α-Zr+β-Nb) phase. The specimens were analyzed for hydride transition temperatures using differential scanning calorimetry and for hydrogen concentration using hot vacuum extraction mass spectrometry. The hydrogen solubility limits found for pure Zr are in good agreement with the previously reported values. The solubility limits found in β-Zr are about two orders of magnitude higher than the solubility limits in α-Zr and the solubility limits found in the aged Zr–20Nb alloy are very close to those in α-Zr.