Nonintrusive ultrasonic sensor for monitoring and control of electroconsolidation process

Electroconsolidation((R)) is a proprietary process for rapid pressure-assisted densification of complex-shaped parts made from powder preforms. The resistive heating used in this method allows extremely high temperatures to be generated rapidly. This paper describes an ultrasonic pitch-catch technique for nonintrusive measurement of temperature within the die cell; this technique can be used for precise control of densification and sintering of parts. Results of ultrasonic data for heating trials conducted at up to 2000 degreesC indicate that average axial temperature in the die can be predicted within 3%.