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Positron trapping and self-diffusion activation energies in chromium (1979)

Campbell, J. L. ; Schulte, C. W.

Springer

Applied physics 19 (1979), S. 149-152

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ISSN: 1432-0630

Keywords: 78.70 ; 66.30 F

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics

Notes: Abstract The activation energy for self-diffusion in chromium is found to be 3.51±0.13 eV from positron trapping measurements. The 4.51 eV activation energy seen in tracer diffusion work is therefore ascribed to divacancies, theQ 2/Q 1 ratio being typical of the bcc refractory group. The positron data give 0.55 for the ratioH 1v M /H 1v F of vacancy migration and formation energies, in agreement with quenching data for tungsten.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00932389

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