(北京航空材料研究院, 北京 100095)
摘 要: 研究了Al在含Re的Ni基合金中的擴(kuò)散行為。 結(jié)果表明: Al在Ni基體中的擴(kuò)散激活能隨著Re含量的增加而增加, 在Re質(zhì)量分?jǐn)?shù)為1%, 2%和3%的Ni中Al的擴(kuò)散激活能分別為230,238和256kJ/mol; 溫度低于(1170±5)℃的時候, Al在Ni基體中的擴(kuò)散速率隨著Re含量的增加而減小, Re阻礙Al原子在Ni基體中的擴(kuò)散; 而在高于(1170±5)℃的時候, Al在Ni基體中的擴(kuò)散速率隨Re含量的增加而增加;(1170±5)℃是一個轉(zhuǎn)折點(diǎn), 在此溫度, Al在不同Re含量的Ni基體中的擴(kuò)散速率幾乎相等。
關(guān)鍵字: 擴(kuò)散; 錸; 鋁; 鎳基高溫合金
(Beijing Institute of Aeronautical Materials, Beijing 100095, China)
Abstract:The diffusion behaviors of aluminium in nickel with rhenium were studied. The results show that, the activation energy of aluminium diffusion in nickel increases with the increase of rhenium content, the activation energies of aluminium diffusion in nickel with rhenium of 1%, 2% and 3%(mass fraction) are 230, 238 and 256kJ/mol respectively; below (1170±5)℃, the diffusion velocity of aluminium in nickel decreases with the increase of rhenium contnet, which implies that the rhenium impedes the aluminium diffusing in nickel; above (1170±5)℃, the diffusion velocity of aluminium in nickel increases with the increase of rhenium contnet; (1170±5)℃ is a temperature of turning range, at which the diffusion velocities of aluminium in nickel with different content of rhenium are similar.
Key words: diffusion; rhenium; aluminium; nickel base superalloy


