Mn Self-Diffusion in Single Grain Icosahedral Al70Pd21.5Mn8.5 Quasicrystals

Thumbnail Image
Date
1996-12-23
Authors
Sprengel, Wolfgang
Lograsso, Thomas
Nakajima, Hideo
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Person
Lograsso, Thomas
Ames Laboratory Division Director
Research Projects
Organizational Units
Organizational Unit
Ames National Laboratory

Ames National Laboratory is a government-owned, contractor-operated national laboratory of the U.S. Department of Energy (DOE), operated by and located on the campus of Iowa State University in Ames, Iowa.

For more than 70 years, the Ames National Laboratory has successfully partnered with Iowa State University, and is unique among the 17 DOE laboratories in that it is physically located on the campus of a major research university. Many of the scientists and administrators at the Laboratory also hold faculty positions at the University and the Laboratory has access to both undergraduate and graduate student talent.

Journal Issue
Is Version Of
Versions
Series
Department
Ames National Laboratory
Abstract

The self-diffusivity of 54Mn in single grain icosahedral Al70Pd21.5Mn8.5 quasicrystals has been determined by a precision grinding technique. In the range from 870 to 1093 K the temperature dependence of the Mn self-diffusivity D follows the Arrhenius equation with an activation energy Q = (180.8±4.6)kJmol-1 and a pre-exponential factor D0 = 3.4×10-4m2s-1. The experimental results are discussed together with diffusion mechanisms proposed for quasicrystals from theoretical considerations.

Comments

This article is from Physical Review Letters 77 (1996): 5233–5236, doi:10.1103/PhysRevLett.77.5233.

Description
Keywords
Citation
DOI
Copyright
Mon Jan 01 00:00:00 UTC 1996
Collections