A NOVEL DESIGN OF AN ULTRASONIC VISCOMETER TO MEASURE VISCOSITY PHASE TRANSFORMATION AND CRYSTALLIZATION IN MOLTEN SOLIDS AT TEMPERATURES UP TO 1450 DEG.C

摘要

The improved ultrasonic device comprises of a melting unit, a buffer rod/sample holder, a cooling unit, and an ultrasonic testing system. The buffer rod/sample holder can be configured as a vertical rod with a port on the top to hold the sample positioned inside a vertical tubular furnace. A sample is kept in a port/chamber at top end of the buffer rod/sample holder, which can be inserted into the furnace from the bottom. The bottom end of the buffer rod/sample holder is water cooled at which the ultrasonic transducers are kept for ultrasonic measurements. In an alternative embodiment, the sample will be inserted through a buffer rod with a port at its first end through the side walls of a box type or through one end of a horizontal tubular furnace. The second end accommodating transducers at which the ultrasonic measurements are to be taken will be water cooled.