Stability and phase transition in Al65Cu20Co15-xFex (0 <= x <= 15) quasi-crystalline systems

Abstract

The samples A165CLl,()C0l5_,I_c, (0: x! 15), A'63CLI,51 e]2 alid Al6C)CUDFeJ5Si5 haVC I)CC11 SYl1t1lCsiZcCI- Their stability and f'01-111CCI I)IMSCS al-C il)VCStil latCd USillg diflel-Cllti ll thermal analysis (DTA) and X-ray diffi-action (XIM), respectively. The MaXiII111111 St',Ibility ill 1110VS is COUlld %VIlCll the FC1111i WaVe vector, kF satisfies the relation K1, = 2kF. Apart from this, specific range of' ela (clectron per atom) and atomic size ratio of constituents also play all important role ill 1,01-111ing tile thermodynamically stable qUJ',iCl-YStalS.