Electrical resistivity and structure of liquid Al-Ge alloys
1989; IOP Publishing; Volume: 1; Issue: 13 Linguagem: Inglês
10.1088/0953-8984/1/13/013
ISSN1361-648X
AutoresJ.G. Gasser, M. Mayoufi, Marie‐Claire Bellissent‐Funel,
Tópico(s)Metallurgical and Alloy Processes
ResumoAluminium is very reactive with the quartz glass vessel generally used for electrical resistivity measurement cells. In the paper the authors describe a new geometrical arrangement to measure accurately the electrical resistivity of liquid alloys, using an alumina vessel. They give experimental results for the Al1-xGex liquid alloys. This system presents an anomalous concentration-dependent temperature coefficient of the resistivity, with respect to the calculated curves, when using the Faber-Ziman formula with pseudopotential form factors and hard-sphere partial structure factors. The authors have measured total structure factors of four Al-Ge alloys by neutron scattering on the 'Orphee' reactor at Saclay, using sapphire monocrystal cells. The temperature dependence of the total experimental structure factor explains qualitatively the anomalous resistivity temperature coefficient.
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