Thermophysical properties by a pulse-heating reflectometric technique: Niobium, 1100 to 2700 K
Anno: 1999
Autori: Righini F., Spisiak J., Bussolino GC., Gualano M.
Affiliazione autori: CNR, Inst Metrol G Colonnetti, I-10135 Turin, Italy;
Slovak Acad Sci, Inst Phys, Bratislava, Slovakia
Abstract: Pulse-heating experiments were performed on niobium strips, taking the specimens from room temperature to the melting point is less than one second. The normal spectral emissivity of the strips was measured by integrating sphere I reflectometry, and, simultaneously, experimental data (radiance temperature. cur rent, voltage drop) for thermophysical properties were collected with submillisecond time resolution. The normal spectral emissivity results were used to compute the true temperature of the niobium strips; the heat capacity, electrical resistivity, and hemispherical total emissivity were evaluated in the temperature range 1100 to 2700 K. The results are compared with literature data obtained in pulse-heating experiments. It is concluded that combined measurements of normal spectral emissivity and of thermophysical properties on strip specimens provide results of the same quality as obtained using tubular specimens with a blackbody. The thermophysical property results on niobium also validate the normal spectral emissivity measurements by integrating sphere reflectometry.
Giornale/Rivista: INTERNATIONAL JOURNAL OF THERMOPHYSICS
Volume: 20 (4) Da Pagina: 1107 A: 1116
Maggiori informazioni: Vedecká Grantová Agentúra MŠVVaŠ SR a SAV, VEGA, 2/5084/98. – One of the authors (J.S.) gratefully acknowledges the financial support received from the Slovak Grant Agency (VEGA) under Contract 2/5084/98. – Commissariat a lParole chiavi: electrical resistivity; heat capacity; hemispherical total emissivity; high temperatures; niobium;DOI: 10.1023/A:1022654804141Citazioni: 21dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-28Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui