The materials with metastable structures , e . g . , nanostructure and supersaturated solid solutions , have unique physic , chemical and mechanical properties , and get extensive application in many fields 具有納米晶、過飽和固溶體等亞穩(wěn)態(tài)結(jié)構(gòu)的材料具有獨特的物理、化學及機械性能,因而在諸多領(lǐng)域獲得了廣泛的應用。