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Measurement of the heat of fusion of molybdenum by a microsecond-resolution transient technique

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Abstract

A microsecond-resolution pulse-heating technique was used for the measurement of heat of fusion of molybdenum. The method is based on rapid resistive self-heating of the specimen by a high-current pulse from a capacitor discharge system and measuring current through the specimen, voltage across the specimen, and radiance temperature of the specimen as functions of time. Melting of the specimen is manifested by a plateau in the temperature versus time function. The time integral of the power absorbed by the specimen during melting yields the heat of fusion. Measurements gave a value of 36.4 kJ · mol−1 for the heat of fusion of molybdenum with an estimated maximum uncertainty of±6%.

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Authors and Affiliations

  1. Thermophysics Division, National Institute of Standards and Technology, 20899, Gaithersburg, Maryland, USA

    J. L. McClure & A. Cezairliyan

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  1. J. L. McClure
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  2. A. Cezairliyan
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Formerly National Bureau of Standards

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McClure, J.L., Cezairliyan, A. Measurement of the heat of fusion of molybdenum by a microsecond-resolution transient technique. Int J Thermophys 11, 731–737 (1990). https://doi.org/10.1007/BF01184341

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