25%, the fracture of graphite rod, pressing problem or sintering problem?
25% graphite ratio is quite high, with the molding production difficult.1 could reduce the ratio of graphite to discuss it with the client? 2 in the mixture of additives (please forgive aids not at the forum released in 3) release to be coherent, there can be no pause
25% of the filling, 40 feel a little lower, and personally recommend using 50MPa. How long have you been under pressure? Suggest 20-30 minutes. Release the pressure a little slower, it will crack soon. Sintering, the insulation point does not need so much, 340, 320, recommended insulation for 4 hours. Also suggest that you do not put too many blanks in a furnace, it is better to cover in the middle, rough heating and heat dissipation will have an impact.
Agree to the above point of view, add a little pressure speed is not fast, in 25mm/min, the bad words too fast exhaust will cause cracking, transverse fracture from your description of the phenomenon, most are not caused by the row of clean air.
