Near-infrared normal spectral emissivity of molten Fe-Ni alloys by electromagnetic heating

• Published in: Infrared physics & technology Vol. 130; p. 104574
• Main Authors: Yu, Kun, Bai, Yinxue, Wang, Gangquan, Li, Longfei, Zhang, Kaihua, Liu, Yufang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2023
• Subjects: Composition; Iron-nickel alloys; Near-infrared normal spectral emissivity; Wavelength; Near-infrared normal spectral emissivity; Composition; Iron-nickel alloys; Wavelength
• ISSN: 1350-4495; 1879-0275
• DOI: 10.1016/j.infrared.2023.104574

•The normal spectral emissivity of molten Fe-Ni alloys were measured in the wavelength range of 1000–1600 nm.•The effect of composition of the nickel was measured and discussed in detail.•Between 1400 nm and 1600 nm, the emissivities of same ingredient Fe-Ni alloy almost overlap. The spectral emissivity of molten Fe-Ni alloys is especially critical to analysis the performance and quality of alloy. The near-infrared normal spectral emissivity of molten Fe-Ni alloys was measured at 1000–1600 nm in the temperature range of 1690–1845 K by a self-built measurement apparatus using the electromagnetic heating technology. The measurement apparatus mainly consists of the electromagnetic heating furnace, blackbody, optical fiber spectrometer and colorimetric thermometer. The dependence of near-infrared normal spectral emissivity of Fe-Ni alloys (Ni, Fe10Ni90, Fe30Ni70, Fe50Ni50, Fe70Ni30, Fe90Ni10 and Fe) on wavelength, temperature and composition were systematically investigated. The results show that the emissivity of Fe70Ni30 is higher in the iron-rich area, while the emissivity of Fe30Ni70 is the lowest in the nickel-rich area. Comparison of the measured and simulated results show that the emissivity of molten Fe-Ni alloys is reliable. The emissivity of Fe-Ni alloys provides reliable data for the research of alloys properties.