用扫描电镜研究了TC11钛合金中界面相的形成过程和生长规律,从而发现界面是在β相转变或分解和钼扩散的条件下以及在850℃以下形成的。界面相中的钼含量在初期时少于β相的,中期多于β相的,最后与β相的含钼量趋于相同并转为β相。界面相厚度的对数与绝对温度的倒数成线性关系。钼在界面相中的扩散系数的对数与绝对温度的倒数也成线性关系,而且求出了钼在界面相中的扩散激活能:950℃、水冷又时效的为32千卡/克原子,950℃、空冷又时效的为15千卡/克原子。 The formation process and growth pattern of interfacial phase in TC11 titanium alloy were studied by SEM. It was found that the interfacial phase formed under the condition of β phase transformation or decomposition and molybdenum diffusion and below 850 ℃. The molybdenum content in the interface phase is less than that of the β phase in the initial stage and more in the medium period than in the β phase. Finally, the content of molybdenum in the phase phase tends to be the same and turns to the β phase. The logarithm of the interface phase thickness is linear with the reciprocal of the absolute temperature. The logarithm of the diffusion coefficient of molybdenum in the interface phase is also linear with the reciprocal of the absolute temperature, and the diffusion activation energy of molybdenum in the interfacial phase is obtained: 950 ℃, water-cooling and aging time is 32 kcal / g atom, 950 ℃, air-cooled and aging for 15 kcal / gram atom.