在使用鈷，銅，鉿為追蹤元素之擴散研究中顯示，非晶形鎳鋯合金材質中原子半徑 小者之擴散行為與大原子完全不同。小原子之擴散機制應以原子間之間隙為主而大原子則必須 仰賴集體多原子重組的方式擴散。 小原子之擴散係數與非晶合金之結晶溫度呈現極強之關連性，反之大原子則無此效應，此一現 象顯示非晶形鎳鋯合金之結晶，乃是由成份中之小原子的擴散所控制，並非一般認為的以大原 子擴散為主。此結果將有助於了解非晶合金材料之特性及其穩定性。
Strong correlation of the diffusion coefficient of small atoms and the crystallization temperature suggests that the crystallization of amorphous -Ni-Zr alloy (a-Ni-Zr) is controlled by the diffusion of the small constituent of the alloy rather by the contituent with large size. Different diffusion behavior of small atoms, Co and Cu and a large atom, Hf, in a-Ni-Zr indicates that the diffusion mechanisms of small and large atoms in amorphous Ni-Zr matrix are different. It is suggested that small atoms diffuse by interstitial -like (localized difect) mechanism, and large atoms diffuse by collective rearrangement of many atoms.
