Accession Number : ADA301371

Title :   Innovative Acoustic Techniques for Studying New Materials and New Developments in Condensed Matter Physics.

Descriptive Note : Final rept. 1 Oct 91-30 Sep 94,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF NUCLEAR ENGINEERING

Personal Author(s) : Maynard, Julian D.

PDF Url : ADA301371

Report Date : 18 DEC 1994

Pagination or Media Count : 13

Abstract : This project involved the use of innovative acoustic techniques to study new materials and new developments in solid state physics. Major accomplishments include: (a) the preparation and publication of a number of papers and book chapters, (b) the measurement and analysis of an aluminum alloy quasi-crystal and its cubic approximant (c) the use of resonant ultrasound to measure acoustic attenuation and determine the effects of heat treatment on ceramics, (d) the extension of our technique for measuring even lower (possibly the lowest) infrared optical absorption coefficient, and (e) the measurement of the effects of disorder on the propagation of a nonlinear pulse, and (f) the observation of statistical effects in measurements of individual bond breaking events in fracture. (AN)

Descriptors :   *ACOUSTIC MEASUREMENT, *SOLID STATE PHYSICS, CRYSTAL STRUCTURE, ALUMINUM ALLOYS, TENSILE STRESS, CRACKING(FRACTURING), POLYSTYRENE, ORDER DISORDER TRANSFORMATIONS, TRANSPARENCE, PHASE STUDIES, HEAT TREATMENT, CERAMIC MATERIALS, BRITTLENESS, NONLINEAR SYSTEMS, OPTICAL ANALYSIS, ULTRASONICS, HELIUM, ACOUSTIC ATTENUATION, INFRARED RADIATION, ABSORPTION COEFFICIENTS, ACOUSTOOPTICS, ACOUSTIC RESONANCE, SYMMETRY(CRYSTALLOGRAPHY).

Subject Categories : Acoustics
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE