Accession Number:

ADA243843

Title:

Acoustic Studies of New Materials: Quasicrystals, Low-Loss Glasses, and High Tc Superconductors

Descriptive Note:

Final rept. 1 Oct 88-30 Sep 91,

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF PHYSICS

Personal Author(s):

Report Date:

1991-12-18

Pagination or Media Count:

33.0

Abstract:

The goals of this project involve the development and application of new techniques in acoustics. The goals are a to study the properties of single crystal high temperature superconductor oxide materials with ultrasonic measurements b to study the properties of quasicrystals using ultrasound and acoustic analog systems and c to develop and apply a new resonant photoacoustic technique to measure optical absorption in very low loss glasses and crystals. Major accomplishments include the development of a new method of ultrasound measurement which permits the determination of all of the independent elastic constants of very small samples a few hundred microns in size, the use of the apparatus to study high temperature superconductor material and aluminum alloy quasicrystals, and the development and test of a new technique for measuring optical absorption with more than an order of magnitude improvement in sensitivity over existing methods.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Acoustics
  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE