Abstract:
Resonant ultrasound spectroscopy (RUS) measurements of material properties at high (above 150 (degrees)C) temperatures have been directed mainly at materials of geological interest, but a wide variety of other applications exists for high temperature RUS measurements. These include physical properties (phase transitions, elastic moduli) of novel solid state materials and understanding and control of processing parameters for industrial materials such as ceramics and steels. A RUS measurement system has been developed which operates to 600 (degrees)C without buffer rods. A description of the materials used and the transducer construction will be presented with some results from measurements on perovskite-type crystal structures and magnetic materials. A discussion of the limits of the present system and possible techniques for bufferless transducers with operating temperatures to 1000 (degrees)C will be presented. [Work supported by the U.S. Department of Energy.]