Document Type

Article

Publication Date

11-2001

Journal or Book Title

Journal of Materials Research

Volume

16

Issue

11

First Page

3287

Last Page

3292

DOI

10.1557/JMR.2001.0452

Abstract

The diffusion characteristics of Mg–rare-earth diffusion couples were studied. Cylinders of pure Mg and rare earth (Dy, Nd, and Pr) were abutted and annealed at 500 °C for 100 h or 300 h. Point-by-point composition profiles were collected starting in pure Mg, across the diffusion zone, and ending in the pure rare earth, using energy dispersive x-ray spectroscopy with a scanning electron microscope. The intermetallic phases that resulted due to diffusion were identified and compared to existing phase diagrams, for which the data is limited. For each diffusion couple, a plot of concentration versus distance perpendicular to the original plane of contact was obtained and analyzed using the Boltzman–Matano method. The interdiffusion coefficients for each set of phases were then calculated. The results show that diffusion through the intermetallic phases is much slower than is expected in a solid solution.

Comments

This article is from Journal of Materials Research 16 (2001): 3287-3292, doi: 10.1557/JMR.2001.0452. Posted with permission.

Copyright Owner

Materials Research Society

Language

en

File Format

application/pdf

Included in

Metallurgy Commons

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