TITLE

Physical properties of liquid and undercooled tungsten by levitation techniques

AUTHOR(S)
Paradis, Paul-François; Ishikawa, Takehiko; Fujii, Ryuichi; Yoda, Shinichi
PUB. DATE
January 2005
SOURCE
Applied Physics Letters;1/24/2005, Vol. 86 Issue 4, p041901
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Maintaining deep undercooling melts represents a formidable challenge when dealing with tungsten due to its high vapor pressure, its melting temperature (Tm=3695 K), and the risk of contamination. Using electrostatic levitation, properties of liquid tungsten were measured above the melting temperature as well as in the undercooled phase. Over the 3125–3710 K interval, the density was measured as ρ(T)=1.67×104-1.08(T-Tm) kg m-3. Similarly, the surface tension was measured as σ(T)=2.478×103-0.31(T-Tm) over the 3360–3700 K range. At Tm, the data agree well with the literature values. The excellent processing conditions also offer opportunities to achieve reproducible and controlled formation of metastable phases.
ACCESSION #
15925577

 

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