Investigation of high-temperature normal infrared spectral emissivity of zro2 thermal barrier coating artefacts by the modified integrated blackbody method

Tong Zhang, Xuyao Song, Gongjin Qi, Baolin An, Wei Dong, Yan Zhao, Zhiyong Wang, Xiaosu Yi, Zundong Yuan, Yunlong Zhao, Luge Sun, Hongyu Mao

Research output: Journal PublicationArticlepeer-review

Abstract

Zirconium oxide (ZrO2 ) is widely used as the thermal barrier coating in turbines and engines. Accurate emissivity measurement of ZrO2 coating at high temperatures, especially above 1000C, plays a vital role in thermal modelling and radiation thermometry. However, it is an extremely challenging enterprise, and very few high temperature emissivity results with rigorously estimated uncertainties have been published to date. The key issue for accurately measuring the high temperature emissivity is maintaining a hot surface without reflection from the hot environment, and avoiding passive or active oxidation of material, which will modify the emissivity. In this paper, a novel modified integrated blackbody method is reported to measure the high temperature normal spectral emissivity of ZrO2 coating in the temperature range 1000C to 1200C and spectral range 8 µm to 14 µm. The results and the associated uncertainty of the measurement were estimated and a relative standard uncertainty better than 7% (k = 2) is achieved.

Original languageEnglish
Article number235
JournalMaterials
Volume15
Issue number1
DOIs
Publication statusPublished - 1 Jan 2022

Keywords

  • High-temperature
  • Integrated blackbody method
  • Normal infrared spectral emissivity
  • Thermal barrier coating
  • Uncertainty
  • ZrO coating artefact

ASJC Scopus subject areas

  • Materials Science (all)
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Investigation of high-temperature normal infrared spectral emissivity of zro2 thermal barrier coating artefacts by the modified integrated blackbody method'. Together they form a unique fingerprint.

Cite this