Patent ID: 9302236
Filing Date: 2016-04-05
CPC Classification: B01J,B24D,C21D,C22F,E21B

Claim Text:
1. A method for forming a polycrystalline compact, the method comprising: introducing grains of a hard material to a press; elevating a system temperature to a plateau sintering temperature; elevating a system pressure to a plateau sintering pressure; lowering the system temperature to a hold temperature past a change point at a change point temperature, the hold temperature being lower than the change point temperature; holding the system temperature at the hold temperature; lowering the system temperature from the hold temperature to a second hold temperature past a second change point at a second change point temperature, the second hold temperature being lower than the second change point temperature; holding the system temperature at the second hold temperature; and lowering the system temperature to a final temperature.