Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-29T05:54:50.007Z Has data issue: false hasContentIssue false
  • English
  • Français

Spectral emittance of resistively heated oxidized ZrB2–30 mol% SiC

Published online by Cambridge University Press:  11 July 2012

Gregg Van Laningham ,
Yolande Berta  and
Robert F. Speyer
Gregg Van Laningham
Affiliation:
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia30332-0245
Yolande Berta
Affiliation:
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia30332-0245
Robert F. Speyer*
Affiliation:
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia30332-0245
*
a)Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

Normal spectral intensities of resistively heated preoxidized ZrB2–30 mol% SiC–6 mol% B4C specimens were measured in the 1–6 μm and ∼1100–1500 °C ranges. Using Wein’s displacement law, the temperatures of these specimens were determined, in turn permitting calculation of normal spectral emittances using Planck’s law. Spectral emittance data were affected by absorption/emission of H2O/CO2 gases; total emittances were determined from the averages of data in spectral ranges devoid of gaseous interference. Total emittances decreased from 1.0 at 1100 °C to 0.8 at 1500 °C. This trend is consistent with the behavior expected of a dielectric coating.

Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 19 , 14 October 2012 , pp. 2520 - 2527
Copyright
Copyright © Materials Research Society 2012

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Incropera, F.P. and DeWitt, D.P.: Fundamentals of Heat and Mass Transfer, 5th ed. (John Wiley and Sons, New York, 2002).Google Scholar
Touloukian, Y.S.: Thermophysical Properties of Matter: The TPRC Data Series; A Comprehensive Compilation of data (IFI/Plenum, New York, 1970).Google Scholar
Siegel, R. and Howell, J.R.: Thermal Radiation Heat Transfer, 4th ed. (Taylor and Francis, New York, 2002).Google Scholar
Modest, M.F.: Radiative Heat Transfer (McGraw-Hill, Inc., Heightstown, NJ, 1993).Google Scholar
Brannon, R.R. Jr. and Goldstein, J.R.: Emittance of oxide layers on a metal substrate. J. Heat Transfer 92(2), 257–263 (1970).CrossRefGoogle Scholar
Clark, H.E. and Moore, D.G.: A rotating cylinder method for measuring normal spectral emittance of ceramic oxide specimens from 1200 to 1600 K. J. Res. Nat. Bur. Stand. Phys. Chem. 70A(5), 393–415 (1966).CrossRefGoogle ScholarPubMed
ASTM Standard E423-71 (2008): Standard Test Method for Normal Spectral Emittance at Elevated Temperatures of Nonconducting Specimens (ASTM International, West Conshohocken, PA, 2008).Google Scholar
Noguchi, T. and Kozuka, T.: Temperature and emissivity measurement at 0.65 μm with a solar furnace. Sol. Energy 10(3), 125–131 (1966).CrossRefGoogle Scholar
Wuchina, E., Opila, E., Opeka, M., Fahrenholtz, W., and Talmy, I.: HUTCs: Ultra-high temperature ceramic materials for extreme environment applications. Electrochem. Soc. Interface 16(4), 30–36 (2007).CrossRefGoogle Scholar
Paul, A., Jayaseelan, D.D., Venugopal, S., Zapata-Solvas, E., Binner, J., Vaidhyanathan, B., Heaton, A., Brown, P., and Lee, W.E.: UHTC composites for hypersonic applications. Am. Ceram. Soc. Bull. 91(1), 22–28 (2012).Google Scholar
Karlsdottir, S.N. and Halloran, J.W.: Rapid oxidation characterization of ultra-high temperature ceramics. J. Am. Ceram. Soc. 90(10), 3233–3238 (2007).CrossRefGoogle Scholar
Scatteia, L., Alfano, D., Monteverde, F., Sans, J., and Balat-Pichelin, M.: Effect of the machining method on the catalycity and emissivity of ZrB2 and ZrB2-HfB2-based ceramics. J. Am. Ceram. Soc. 91(5), 1461–1468 (2008).CrossRefGoogle Scholar
Scatteia, L., Cooosentino, G., Cantoni, S., Balat-Pichelin, M., Beche, E., and Sans, J.L.: An investigation upon the catalytic and radiative behaviors of ZrB2-SiC ultra high temperature ceramic composites, in Proceedings 5th European Workshop on Thermal Protection Systems and Hot Structures, Noordwijk, The Netherlands, 17–19, May 2006.Google Scholar
Meng, S., Chen, H., Hu, J., and Wang, Z.: Radiative properties characterization of ZrB2-SiC-based ultrahigh temperature ceramic at high temperature. Mater. Des. 32, 377–381 (2011).CrossRefGoogle Scholar
Zapadaeva, T.E., Nikolaeva, E.E., Ordan’yan, S.S., and Petrov, V.A.: Emissivity and specific electrical resistivity of compositions in the LaB6-ZrB2 System. Sov. Powder Metall. Met. Ceram. 26(7), 581–583 (1987).CrossRefGoogle Scholar
Peng, F. and Speyer, R.F.: Effect of SiC, TaB2 and TaSi2 additives on the isothermal oxidation resistance of fully dense zirconium diboride. J. Mater. Res. 24(5), 1855–1867 (2009).CrossRefGoogle Scholar
Peng, F., Van Laningham, G., and Speyer, R.F.: Thermogravimetric analysis of the oxidation resistance of ZrB2-SiC and ZrB2-SiC-TaB2-based compositions in the 1900°C range. J. Mater. Res. 26(1), 96–107 (2011).CrossRefGoogle Scholar
Raytheon Vision Systems: Infrared Wall Chart (Raytheon Vision Systems, Goleta, CA, 2012).Google Scholar