Heat induced damage detection by terahertz (THz) radiation

Ehsan Kabiri Rahani, Tribikram Kundu, Ziran Wu, Hao Xin

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Terahertz (THz) and sub-terahertz imaging and spectroscopy are becoming increasingly popular nondestructive evaluation techniques for damage detection and characterization of materials. THz radiation is being used for inspecting ceramic foam tiles used in TPS (Thermal Protection System), thick polymer composites and polymer tiles that are not good conductors of ultrasonic waves. Capability of THz electromagnetic waves in detecting heat induced damage in porous materials is investigated in this paper. Porous pumice stone blocks are subjected to long time heat exposures to produce heat induced damage in the block. The dielectric properties extracted from THz TDS (Time Domain Spectroscopy) measurements are compared for different levels of heat exposure. Experimental results show noticeable and consistent change in dielectric properties with increasing levels of heat exposure, well before its melting point.

Original languageEnglish (US)
Pages (from-to)848-856
Number of pages9
JournalJournal of Infrared, Millimeter, and Terahertz Waves
Volume32
Issue number6
DOIs
StatePublished - Jun 2011

Fingerprint

Damage detection
damage
Radiation
heat
radiation
tiles
dielectric properties
Tile
Dielectric properties
pumice
thermal protection
Spectroscopy
Ceramic foams
Terahertz waves
polymers
porous materials
ultrasonic radiation
foams
Ultrasonic waves
spectroscopy

Keywords

  • Dielectric properties
  • Nondestructive testing
  • Thermal effects
  • THz time-domain spectroscopy

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Radiation
  • Instrumentation

Cite this

Heat induced damage detection by terahertz (THz) radiation. / Rahani, Ehsan Kabiri; Kundu, Tribikram; Wu, Ziran; Xin, Hao.

In: Journal of Infrared, Millimeter, and Terahertz Waves, Vol. 32, No. 6, 06.2011, p. 848-856.

Research output: Contribution to journalArticle

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