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Determination of the Surface Tension of Liquid Fe 77.5 Cu13Mo 9.5 Ternary Monotectic Alloy |
| WANG Hai-Peng;CHANG Jian;LUO Bing-Chi;WEI Bing-Bo |
| Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072 |
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| Cite this article: |
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WANG Hai-Peng, CHANG Jian, LUO Bing-Chi et al 2007 Chin. Phys. Lett. 24 504-507 |
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Abstract Thermophysical properties of undercooled liquid monotectic alloys are usually difficult to be determined because of the great difficulty in achieving large undercoolings. We measure the surface tension of liquid Fe 77.5 Cu13Mo 9.5 monotectic alloy by an electromagnetic oscillating drop method over a wide temperature range from 1577 to 1784K, including both superheated and undercooled states. A good linear relationship exists between the surface tension and temperature. The surface tension value is 1.588N/m at the monotectic temperature of 1703K, and its temperature coefficient is -3.7×10 -4 Nm -1 K -1. Based on the Butler equation, the surface tension is also calculated theoretically. The experimental and calculated results indicate that the effect of the enriched element on droplet surface is much more conspicuous than the other elements to decrease the surface tension.
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| Keywords:
61.25.Mv
68.03.Cd
65.20.+w
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Received: 28 August 2006
Published: 24 February 2007
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