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Record Details

Record 45 of 1274
Optical and thermodynamic property measurements of liquid metals and alloys
External Online Source: doi:10.1016/0273-1177(91)90262-I
Author and Affiliation:
Weber, J. K. R.(Intersonics, Inc., Northbrook, IL, United States)
Krishnan, Shankar(Intersonics, Inc., Northbrook, IL, United States)
Schiffman, Robert A.(Intersonics, Inc., Northbrook, IL, United States)
Nordine, Paul C.(Intersonics, Inc., Northbrook, IL, United States)
Abstract: Optical properties and spectral emissivities of liquid silicon, titanium, niobium, and zirconium were investigated by HeNe laser polarimetry at 632.8 nm. The metals were of a high purity and, except for zirconium, clean. The more demanding environmental requirements for eliminating oxide or nitride phases from zirconium were not met. Containerless conditions were achieved by electromagnetic levitation and heating. CO2 laser beam heating was also used to extend the temperature range for stable levitation and to heat solid silicon to form the metallic liquid phase. Corrections to previously reported calorimetric measurements of the heat capacity of liquid niobium were derived from the measured temperature dependence of its spectral emissivity. Property measurements were obtained for supercooled liquid silicon and supercooling of liquid zirconium was accomplished. The purification of liquid metals and the extension of this work on liquids to the measurement of thermodynamic properties and phase equilibria are discussed.
Publication Date: Jan 01, 1991
Document ID:
19910068784
(Acquired Nov 28, 1995)
Accession Number: 91A53407
Subject Category: MATERIALS PROCESSING
Document Type: Journal Article
Publication Information: Advances in Space Research (ISSN 0273-1177); 11; 7, 19; 43-52
Publisher Information: United Kingdom
Financial Sponsor: NASA; United States
Organization Source: Intersonics, Inc.; Northbrook, IL, United States
Description: 10p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: LASER INDUCED FLUORESCENCE; LIQUID METALS; OPTICAL PROPERTIES; TEMPERATURE MEASUREMENT; THERMODYNAMIC PROPERTIES; HELIUM-NEON LASERS; NIOBIUM; POLARIMETRY; SILICON; TITANIUM; ZIRCONIUM
Imprint And Other Notes: (Microgravity research: Material and fluid sciences; Proceedings of Symposium 11 of the COSPAR 28th Plenary Meeting, The Hague, Netherlands, June 25-July 6, 1990. A91-53401 23-29) Advances in Space Research (ISSN 0273-1177), vol. 11, no. 7, 1991, p. 43-52. Research supported by NASA.
Miscellaneous Notes: Research supported by NA
Availability Source: Other Sources
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