材料物理导论-Chapter_8_Ternary_Phase_Diagram.ppt

1、1. Component representation,Concentration triangle,Equilateral triangle,Clockwise coordinate,B,C,A, A%,2. Determine the concentration,a). To determine composition of point O,Pass point O make a line parallel to BC. Find the intercept from parallel to coordinate A to obtain the contents of constituen

2、t A. Similarly, the contents of constituent B,C can be obtained.,b). Determine the composition of alloy I、II、III、IV.,Point I ：,A%=60% B%=30% C%=10%,Point II：,A%=20% B%=50% C%=30%,b). Determine the composition of alloy I、II、III、IV.,Point III ：,A%=20% B%=20% C%=60%,b). Determine the composition of all

3、oy I、II、III、IV.,Point IV ：,A%=40% B%=0% C%=60%,b). Determine the composition of alloy I、II、III、IV.,c). Point out the alloy possessing the composition of 75%A+10%B+ 15%C,d). Point out the Alloy possessing the composition of 50%A+20%B+ 30%C,2. The specific straight line in concentration triangle,Point

4、 II : 20%A- 50%B- 30%C,Point III: 20%A- 20%B- 60%C,Point IV : 40%A- 0%B- 60%C,a). The straight line parallel to a certain edge,The diagonal constituent contains the same concentration.,Draw out the alloy possessing the composition of A 40%,Draw out the alloy possessing the composition of C 30%,b). P

5、ass a certain culmination make a straight line,Constant,Draw out the alloy which is C / B 1/3,Draw out the alloy which is A / C 1/4,3.Linear rule and the center of gravity rule,a). Linear rule, Apply to two-phase equilibrium,Projected on any side ，calculation with the dual lever law,B,C,A, A%,b).The

6、 center of gravity rule,Apply to ternary phase equilibrium,4.Other concentration triangles,a). Concentration isosceles triangles,Constituent B contains few composition point near to the AC side AC and BC sides are amplified in proportion.,A,B,C,b). Concentration right triangles,A,The origin is the constituent A substrate,Ordinate and abscissa are the constituent B and C respectively,The concentration of B and C can be directly re