High-Temperature Metallic Melts – Resistivity Intercomparison for Space Applications
Liquid state densities and electrical resistivities of pure copper and nickel as well as some of their binary alloys in the vicinity of the constantan mixing ratio (Cu53Ni47 at%) were measured by electromagnetic levitation and pulse-heating techniques. The experiments were performed as part of a joint project between the German Aerospace Center (DLR) and Graz University of Technology (TUG) with the main objective being to compare and support deeper understanding of different techniques for electrical resistivity measurements and their data. The manufacture of a levitation experiment similar to the setup at DLR is underway, which is scheduled for microgravity (μg) experiments onboard the ISS in 2010. As a first step, DLR performed measurements on a set of binary Cu–Ni-alloys (as well as two pure constituents), and independent experiments for constantan and the two pure metals were conducted at TUG. The results give promising agreement between the two techniques, show a reasonable overlap within the estimated uncertainties, and lead the way to more comparative measurements with newly developed materials.
KeywordsCopper Density Electrical resistivity High temperatures Liquid state Nickel
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- 2.G. Lohöfer, J. Piller, The new ISS electromagnetic levitation facility: MSL – EML, Proceedings of 40th AIAA Aerospace Sciences Meeting & Exhibit, AIAA 2002–0764 (2002)Google Scholar
- 5.B. Wilthan, H. Reschab, R. Tanzer, W. Schützenhöfer, G. Pottlacher, in Proc. TEMPMEKO 2007 (to be published in Int. J. Thermophys.)Google Scholar
- 7.Boivineau M., Pottlacher G. (2006). Int. J. Mater. Prod. Technol. 26: 217Google Scholar
- 10.Feest E.A., Doherty R.D. (1971). J. Inst. Metals 99: 102Google Scholar
- 11.J.W. Arblaster, Private communication, Coleshill Laboratories, Gorsey Lane, Coleshill, West Midlands B46 1JU, UK (2007)Google Scholar
- 12.Kul’gavchuck V.M., Novoskol’tseva G.A. (1966). Sov. Phys. Tech. Phys. 11: 406Google Scholar
- 14.Expression of the Uncertainty of Measurement in Calibration, EA-4/02, http://www.european- accreditation.org/n1/doc/ea-4–02.pdfGoogle Scholar
- 15.L.-D. Lucas, in Viscometry and Densitometry, ed. by R.A. Rapp. Physcichemical Measurements in Metals Research, vol. IV–Part 2, (Interscience Pubs., New York, 1970), pp. 219–292Google Scholar