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Self-diffusion of 3d transition metals in liquid silicon alloys

Pommrich, A.I. and Unruh, Tobias and Meyer, Andreas (2013) Self-diffusion of 3d transition metals in liquid silicon alloys. High Temperatures-High Pressures, 42 (1), pp. 49-55. Old City Publishing. ISSN 0018-1544

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Abstract

Self-diffusion coefficients of titanium and cobalt in a silicon melt with 10 at.% metal content were measured in a temperature range between 180 K above and below the liquidus temperature, respectively, with quasielastic neutron scattering. The chemical reactive melts were processed container-less by electromagnetic levitation. Whereas, in crystalline silicon self diffusion coefficients of Ti and Co impurities differ by more than 3 orders of magnitude close to the melting point, in the liquid state values of self-diffusion coefficients of Ti and Co, are equal within error bars and are of the order of 10-8 m2/s. This is in line with a liquid-like, collective transport mechanism that is dominated by the mobility of the surrounding Si atoms.

Item URL in elib:https://elib.dlr.de/117342/
Document Type:Article
Title:Self-diffusion of 3d transition metals in liquid silicon alloys
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pommrich, A.I.UNSPECIFIEDUNSPECIFIED
Unruh, TobiasHeinz-Maier-Leibnitz Forschungsneutronenquelle, FRM II, Technische Universität München, 85747 Garching GermanyUNSPECIFIED
Meyer, Andreasandreas.meyer (at) dlr.deUNSPECIFIED
Date:2013
Journal or Publication Title:High Temperatures-High Pressures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:42
Page Range:pp. 49-55
Publisher:Old City Publishing
ISSN:0018-1544
Status:Published
Keywords:Liquid silicon, liquid silicon based alloys, self-diffusion, quasielastic neutron scattering.
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Materialdesign und neue Materialien
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Scientific Experiments MP
Institute of Materials Physics in Space > Leitungsbereich MP
Deposited By: Kargl, Dr Florian
Deposited On:18 Dec 2017 06:46
Last Modified:06 Sep 2019 15:20

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