The idea about preparation of Re-Mo-Ti alloy is put forward because of applications of Re and Mo-Re alloys in aerospace.Basing on the thermodynamics theory,the feasibility of developing a new high temperature alloy Re...The idea about preparation of Re-Mo-Ti alloy is put forward because of applications of Re and Mo-Re alloys in aerospace.Basing on the thermodynamics theory,the feasibility of developing a new high temperature alloy Re-Mo-Ti is investigated.The solid solution forming enthalpies of binary alloys Re-Ti,Mo-Ti and Mo-Re are calculated with the Miedema thermodynamics theory.The Miedema theory of binary alloy can be used in ternary alloy through Kohler model or Toop model.The calculated results show that the forming enthalpies of binary alloys Re-Ti,Ti-Mo and Re-Mo are negative,which indicates that binary alloys Re-Ti,Ti-Mo and Re-Mo can form solid solution in wider component area.The forming enthalpies of Re-Mo-Ti ternary alloy are still negative and smaller than those of binary alloys Re-Ti,Ti-Mo or Re-Mo,which indicates it is possible to form large solid solution graph area among ternary alloys of Ti,Mo,Re elements.It is feasible to develop a new high temperature material in thermodynamics,in this material Re-Mo-Ti solid solution as base phase,and the Ti5Re24 intermetallic compounds or interphase ω (Ti4Mo3) as strengthening phase.展开更多
基金the Shanghai Leading Academic Discipline Project of China (No.J51402)the Innovation Program of Shanghai Municipal Education Commission of China (No.11ZZ177)
文摘The idea about preparation of Re-Mo-Ti alloy is put forward because of applications of Re and Mo-Re alloys in aerospace.Basing on the thermodynamics theory,the feasibility of developing a new high temperature alloy Re-Mo-Ti is investigated.The solid solution forming enthalpies of binary alloys Re-Ti,Mo-Ti and Mo-Re are calculated with the Miedema thermodynamics theory.The Miedema theory of binary alloy can be used in ternary alloy through Kohler model or Toop model.The calculated results show that the forming enthalpies of binary alloys Re-Ti,Ti-Mo and Re-Mo are negative,which indicates that binary alloys Re-Ti,Ti-Mo and Re-Mo can form solid solution in wider component area.The forming enthalpies of Re-Mo-Ti ternary alloy are still negative and smaller than those of binary alloys Re-Ti,Ti-Mo or Re-Mo,which indicates it is possible to form large solid solution graph area among ternary alloys of Ti,Mo,Re elements.It is feasible to develop a new high temperature material in thermodynamics,in this material Re-Mo-Ti solid solution as base phase,and the Ti5Re24 intermetallic compounds or interphase ω (Ti4Mo3) as strengthening phase.
