Noncontact surface tension and viscosity measurements of rhenium in the liquid and undercooled states

Takehiko Ishikawa; Paul-François Paradis; Shinichi Yoda
December 2004
Applied Physics Letters;12/13/2004, Vol. 85 Issue 24, p5866
Academic Journal
Surface tension and viscosity of liquid rhenium, which have hardly been measured due to the extremely high melting temperature of rhenium, were measured using an electrostatic levitation method combined with the oscillation drop technique. Sample position instability problems caused by the photon pressure of the heating lasers and by sample evaporation were solved by modifying the electrodes design. Good sample stability allowed the measurements of the surface tension and the viscosity over wide temperature ranges including the undercooled states. Over the 2800–3600 K interval, the surface tension of rhenium was measured as σ(T)=2.71×103-0.23(T-Tm), where Tm is the melting temperature, 3453 K. At Tm, the datum agrees well with the literature values. Similarly, on the same temperature range, the viscosity was determined as η(T)=0.08 exp[1.33×105/(RT)] (mPa s).


Related Articles

  • Noncontact surface tension and viscosity measurements of molten oxides with a pressurized hybrid electrostatic-aerodynamic levitator. Ishikawa, Takehiko; Yu, Jianding; Paradis, Paul-François // Review of Scientific Instruments;May2006, Vol. 77 Issue 5, p053901 

    In order to measure the surface tension and the viscosity of molten oxides, the oscillation drop technique has been applied on a pressurized hybrid electrostatic-aerodynamic levitator. To suppress the electrical discharge between the top and bottom electrodes, the drop excitation method which...

  • Diode lasers open doors in new markets. Kincade, Kathy; Steele, Robert V. // Laser Focus World;Mar2002, Vol. 38 Issue 3, pS5 

    Forecasts on the expected increase in the demand for laser products in the global market in 2002. Role of diversity of laser products in the industrial market; Effect of changes on the military spending of the U.S.; Role of diode lasers in the medical-laser market; Other markets that are...

  • A computerized Langmuir probe system. Pilling, L. S.; Bydder, E. L.; Carnegie, D. A. // Review of Scientific Instruments;Jul2003, Vol. 74 Issue 7, p3341 

    For low pressure plasmas it is important to record entire single or double Langmuir probe characteristics accurately. For plasmas with a depleted high energy tail, the accuracy of the recorded ion current plays a critical role in determining the electron temperature. Even for high density...

  • An era closes. Belforte, David A. // Industrial Laser Solutions;Sep2008, Vol. 23 Issue 9, p34 

    The article reports on the end of the International Manufacturing Technology Show (IMTS) in the U.S. It states that the Association of Manufacturing Technology (AMT) has announced the demise of the IMTS, because they will be joining with other associations to combine efforts for the 2009 Fabtech...

  • Passive mode locking of a XeCl laser. Efthimiopoulos, T. // Applied Physics Letters;1984, Vol. 45 Issue 4, p346 

    Passive mode locking of a 20-ns pulse duration XeCl laser was achieved. A modulation of 90% and less than 2-ns pulses are reported using Coumarin 1 and Auramine-0 dyes as saturable absorbers.

  • Ring laser.  // Spectroscopy;May2006, Vol. 21 Issue 5, p54 

    The article features the Matisse tunable CW ring laser. This is innovated by Newport. Accordingly, this instrument has inherent stability towards external mechanical and acoustic perturbations. It has active photonic elements and an electro-optic modulator for fast cavity-length stabilization....

  • The Nike KrF laser facility: Performance and initial target experiments. Obenschain, S. P.; Bodner, S. E.; Colombant, D.; Gerber, K.; Lehmberg, R. H.; McLean, E. A.; Mostovych, A. N.; Pronko, M. S.; Schmitt, A. J.; Pawley, C. J.; Sethian, J. D.; Serlin, V.; Stamper, J. A.; Sullivan, C. A.; Dahlburg, J. P.; Gardner, J. H.; Chan, Y.; Deniz, A. V.; Hardgrove, J.; Lehecka, T. // Physics of Plasmas;May96, Vol. 3 Issue 5, p2098 

    Krypton-fluoride ~KrF! lasers are of interest to laser fusion because they have both the large bandwidth capability ~.THz! desired for rapid beam smoothing and the short laser wavelength ~ 14mm! needed for good laser?target coupling. Nike is a recently completed 56-beam KrF laser and target...

  • A copper bromide vapor laser with computer control of the repetitive-pulse, train, and waiting operating modes. Dimaki, V.; Sukhanov, V.; Troitskii, V.; Filonov, A.; Shestakov, D. // Instruments & Experimental Techniques;Nov2008, Vol. 51 Issue 6, p890 

    A copper bromide vapor laser with an average radiation power of 10 W operating in a reducedenergy-contribution mode with the computer-controlled repetitive-pulse, train, and waiting operating modes is described. The influence of the parameters of laser operating modes on the lasing...

  • Type-II Interband Cascade Lasers: From Concept to Devices. Yang, Rui Q. // AIP Conference Proceedings;2005, Vol. 772 Issue 1, p1553 

    I briefly discuss the underlying physics of type-II interband cascade lasers and review their development from concept to high performance devices. © 2005 American Institute of Physics


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics