【摘要】 通过试验测试及动力学方程计算,研究了(TiCr)1-xVx(x=0.05,0.10,0.35)V-Ti-Cr系合金吸氢动力学机制.结果显示,随着钒含量的增加,合金由莱维氏单相结构逐渐转变为莱维氏相和低钒含量的体心立方(BCC)固溶体两相结构,最终转变为高钒含量的BCC固溶体单相结构.相应地,其吸氢机制也由化学反应控制,逐渐转变为形核长大机制,最终转变为三维扩散机制.相结构的变化同吸氢机制的变化有一定的对应关系,吸氢动力学机制不同,表现出吸氢速率不同,化学反应控制的吸氢过程速度较快,三维扩散机制控制的吸氢过程速度较慢.更多还原

【Abstract】 The kinetic mechanisms of（TiCr）₁-xV_x（x=0.05,0.10,0.35） alloys were investigated based on the experiments and kinetic function calculations.The results show that with the increase of vanadium content,the microstructure transforms from primary single Laves phase into Laves phase and low V body center cubic（BCC） solid solution double phases,and high V BCC solid solution single phase finally.Correspondingly,the kinetic mechanisms of hydrogen absorption in these alloys are found to be controlled firstly by a chemical reaction mechanism,then by a nucleation and growth mechanism,and a 3-dimensional diffusion mechanism.An apparent correspondence between phase structure and hydrogen absorption mechanism is observed-the alterant kinetic mechanisms often obviously change the kinetic reaction rate especially,for the faster chemical reaction mechanism and slower 3-dimensional diffusion mechanism.更多还原