Thermodynamic criterion for the formation of Laves phases in binary transition-metal systems |
| |
| Authors: | R F Zhang B X Liu |
| |
| Institution: | 1. AT &2. T Bell Laboratories , Murray Hill, New Jersey, 07974, U.S.A.;3. Bell Communications Research , 331 Newman Spring Road, Redbank, New Jersey, 07701, U.S.A.;4. T Bell Laboratories , Murray Hill, New Jersey, 07974, U.S.A. |
| |
| Abstract: | A thermodynamic factor k is proposed to combine the deviation of atomic size ratio from the ideal value of 1.225 and the formation enthalpy, for the formation of Laves phases in binary transition-metal systems. Based on calculations for some 132 Laves phases, the conditions favouring the formation of the Laves phases are that k be greater than a critical value of 310 and formation enthalpy be larger than ?130 kJ mol?1. The calculated results are statistically in agreement with experimental observations reported so far in the literature. |
| |
| Keywords: | |
|
|
