In this case, the part had trouble during debind but then sintered really well.
What likely happened is that the kiln/furnace temperatures ramped too quickly during the debind phase and the binder boiled out of the part rather than sublimating and escaping as a gas. You can see how the binder pushed out of the part.
Things to try:
- Slow down the temperature ramps in the debind phase of your cycle. Slower heating will help the binder behave properly.
If you have a very large part, slow ramps are key. Take a look at this case study to see how one user adjusted the process to get great parts.