Automated apparatus for dynamic mechanical analysis using the piezoelectric ultrasonic composite oscillator technique

• Published in: Journal of physics. D, Applied physics Vol. 39; no. 24; pp. 5290 - 5293
• Main Authors: Daniels, J E, Finlayson, T R
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 21.12.2006; Institute of Physics
• Subjects: Anelasticity, internal friction, stress relaxation, and mechanical resonances; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Elasticity, elastic constants; Exact sciences and technology; Martensitic transformations; Materials science; Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Physics; Cadmium alloys; Young modulus; Internal friction; Shape memory alloy; Gold alloys; Phase transformations; Piezoelectric transducers; Martensitic transformations; Ultrasonic waves; Measuring methods; Dynamic properties
• ISSN: 0022-3727; 1361-6463
• DOI: 10.1088/0022-3727/39/24/028

Computer-controlled apparatus for the measurements of dynamic Young's modulus and internal friction as functions of temperature, using the piezoelectric ultrasonic composite oscillator technique (PUCOT), has been designed and demonstrated. The versatility of the apparatus and its resonance tracking techniques have been proven by detecting subtle structural phase transformations within the Ca1-xSrxTiO3 perovskite system as well as dramatic changes accompanying the martensitic transformation in a Au-Cd shape-memory alloy. The simplicity of the PUCOT technique allows a system such as this to be constructed easily and with low cost.