Hydrogenation Behavior in Ti-Cr Alloys with Compositions around TiCr2 Laves Phase
Hydrogenation Behavior in Ti-Cr Alloys with Compositions around TiCr2 Laves Phase
复制标题
TiCr2 Laves 相周围成分的 Ti-Cr 合金的氢化行为
DOI：
10.2320/matertrans.43.2741
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发表时间：
2002
影响因子：
1.2
通讯作者：
M. Okada
中科院分区：
文献类型：
--
作者：
H. Homma;H. Saitoh;A. Kamegawa;M. Okada
用氚发光法和PCT法研究了TiCr2Laves相附近成分的钛铬合金的氢化行为。所有样品均为体心立方相和Laves相两相结构。随着热处理温度的升高，体心立方相与Laves相的比例增大。在Ti50Cr50合金和Ti30Cr70合金中分别形成了富钛体心立方相和富铬体心立方相。结果表明，在氢渗透的初始阶段，氢很容易渗入Laves相。在PCT测试中，Ti50Cr50合金吸氢量最大。在1400◦C和150◦C的热处理温度下，Ti50Cr50合金的储氢容量达到最大值3.5%。Ti50Cr50合金和Ti30Cr70合金的相变温度曲线分别在低氢压区和高氢压区出现平台。这些平台分别属于富钛体心立方相和富铬体心立方相。
Hydrogenation behavior in Ti–Cr alloys with compositions around TiCr2 Laves phase has been examined by the tritium radioluminography and the PCT measurement. All of the specimens have been two-phase structure of BCC phase and Laves phase. The ratio of the BCC phase to the Laves phase has been increased as increasing the heat treatment temperature. The Ti-rich BCC phase and Cr-rich BCC phase have been formed in the Ti50Cr50 alloy and the Ti30Cr70 alloy, respectively. It is found that hydrogen easily penetrates into the Laves phase in the initial stage of hydrogen penetration. In the PCT measurements, Ti50Cr50 alloy absorbed the largest amount of hydrogen. The maximum protium storaging capacity of 3.5 mass% was obtained in the Ti50Cr50 specimen heat treated at 1400 ◦ C at the measured temperature of 150 ◦ C. The plateau of PCT curves in Ti50Cr50 alloy and Ti30Cr70 alloy appeared at low hydrogen pressure and high hydrogen pressure region, respectively. These plateaus are attributed to the Ti-rich BCC phase and the Cr-rich BCC phase, respectively.