Looking for reference on hot pressing
I am conducting some experiments in which the samples are to be produced via hot pressing. However, I have been unable to produce flaw-free parts (e.g., parts exhibit pancaking and crown defects). I'm not sure what modifications to the load schedule or die assembly should be made to help alleviate the issue, but as a start I'd like to find a general reference discussing the types of flaws that can develop during pressing and how to address them.
Does anyone know of any such references? I've not been able to find much more than introductory treatments in general ceramic texts.