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- W218151187 abstract "The normal spectral emissivities of liquid Ti, V, Zr, Mo, and Pt were determined at the fusion temperatures in an electron-beam furnace using a water-cooled copper hearth. The normal spectral emissivities were estimated above the melting points by using adjusted two-color temperatures as approximations of the true temperatures for substitution in Wien's equation. Simultaneous brightness temperatures were determined with a micro-optical pyrometer. The true temperature ranges covered were 1,668/sup 0/ to 1,885/sup 0/C for Ti; 1,919/sup 0/ to 2,013/sup 0/C for V; 1,855/sup 0/ to 2,367/sup 0/C for Zr; 2,610/sup 0/ to 2,751/sup 0/C for Mo, and 1,772/sup 0/ to 1,990/sup 0/C for Pt. The spectral emissivities for titanium and zirconium decreased with increasing temperature. At an effective wavelength (lambda) of 658 m..mu.. the emissivity of titanium ranged from 0.51 to 0.45 and zirconium, from 0.47 to 0.41. The emissivities of vanadium (lambda = 658 m..mu..) and molybdenum (lambda = 657 m..mu..) were constant at 0.41 +- 0.02 and 0.33 +- 0.01, respectively. The spectral emissivity of platinum (lambda = 658 m..mu..) was constant at 0.39 +- 0.02 up to 1,900/sup 0/C; above that temperature anomalous data were obtained. A mass spectrometric study indicated that platinum was reacting with backstreamingmore » silicon vapors from the diffusion pump when the ambient pressure was greater than 2 x 10/sup -5/ torr.« less" @default.
- W218151187 created "2016-06-24" @default.
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- W218151187 date "1973-01-01" @default.
- W218151187 modified "2023-09-26" @default.
- W218151187 title "Liquid state spectral emissivities of titanium, vanadium, zirconium, molybdenum, and platinum in an electron beam furnace" @default.
- W218151187 hasPublicationYear "1973" @default.
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