Measurement of the high-temperature strain of UHTC materials using chemical composition gratings

Weihua Xie, Songhe Meng, Hua Jin*, Chong Du, Libin Wang, Tao Peng, Fabrizio Scarpa, Shiyu Huo

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

5 Citations (Scopus)
391 Downloads (Pure)


This paper proposes a simple bonding and measuring technique to realise silica-based chemical composition gratings’ (CCGs) high temperature applications on hot structures. We describe a series of experiments on CCGs to measure the thermal and mechanical response characteristics of ultra-high temperature ceramic (UHTC) materials when the maximum temperature is above 1000°C. Response characteristics are obtained at the heating and cooling stages. Results show that the wavelength response of the CCGs bonded on the UHTC plate increases non-linearly with increasing temperatures, but decreases almost linearly with decreasing temperatures. The temperature-dependent strain transfer coefficients are calculated theoretically and experimentally; results show that the values of strain transfer coefficients below 1000°C are significantly affected by the thermal expansion coefficient of the substrate material and the interface. The strain transfer coefficient value tends to vary slowly between 0.616 and 0.626 above 700°C.
Original languageEnglish
Article number055101
Number of pages9
JournalMeasurement Science and Technology
Issue number5
Early online date30 Mar 2016
Publication statusPublished - May 2016


  • Fibre optics sensors
  • Chemical composition gratings
  • High-temperature application
  • Ultra-high temperature ceramics
  • Strain and temperature


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