In situ studies of mass transport in liquid alloys by means of neutron radiography

被引：31

作者：

Kargl, F. ^{[1
]}

Engelhardt, M. ^{[1
]}

Yang, F. ^{[1
]}

Weis, H. ^{[1
]}

Schmakat, P. ^{[2
]}

Schillinger, B. ^{[3
]}

Griesche, A. ^{[4
]}

Meyer, A. ^{[1
]}

机构：

[1] Deutsch Zentrum Luft & Raumfahrt DLR, Inst Mat Phys Weltraum, D-51170 Cologne, Germany

[2] Tech Univ Munich, Phys Dept E21, D-85747 Garching, Germany

[3] Tech Univ Munich, Forsch Neutronenquelle Heinz Maier Leibnitz FRM I, D-85747 Garching, Germany

[4] Bundesanstalt Mat Forsch Prufung, D-12205 Berlin, Germany

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2011年 / 23卷 / 25期

关键词：

SHEAR CELL TECHNIQUE; DIFFUSION EXPERIMENTS; SELF-DIFFUSION; COEFFICIENTS; MISSION; SYSTEMS; MELTS;

D O I：

10.1088/0953-8984/23/25/254201

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

When in situ techniques became available in recent years this led to a breakthrough in accurately determining diffusion coefficients for liquid alloys. Here we discuss how neutron radiography can be used to measure chemical diffusion in a ternary AlCuAg alloy. Neutron radiography hereby gives complementary information to x-ray radiography used for measuring chemical diffusion and to quasielastic neutron scattering used mainly for determining self-diffusion. A novel Al2O3 based furnace that enables one to study diffusion processes by means of neutron radiography is discussed. A chemical diffusion coefficient of Ag against Al around the eutectic composition Al68.6Cu13.8Ag17.6 at.% was obtained. It is demonstrated that the in situ technique of neutron radiography is a powerful means to study mass transport properties in situ in binary and ternary alloys that show poor x-ray contrast.

引用

页数：8

共 26 条

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