Nickel powder (Inconel 625 with solidus and liquidus temperatures of 1250 oC and 1315 oC) are used to fabricate porous electrodes via pressureless compacting followed by sintering at different temperatures for 2 h. The test coupons have dimensions of 10 10 10 mm3 and after sintering, shrinkage occurs in samples. The new dimensions after sintering are given in the following table.

Calculate final density based on each sintering temperature. Inaddition,determinesinteringmechanismforeachsinteringtemperature. Plot relative density as a function of sintering temperature. Compare grain size of the sintered part at 1220 oC and 1300 oC with starting powder with

powder particle size of 50 m.

Green density: 50% = 8.2 g/cm3

Temp [C] 1220 dimenssion [mm] 9.8 1240 9.6 1260 8.7 1280 8.1 1300 7.95 Temp [C] 1220 dimenssion [mm] 9.8 1240 9.6 1260 8.7 1280 8.1 1300 7.95