Ultrasonic characterization of elastic anisotropy in plasma-sprayed alumina coatings

S. Parthasarathi, Bernhard R. Tittmann, K. Sampath, E. J. Onesto

Research output: Contribution to journalReview article

21 Citations (Scopus)

Abstract

An ultrasonic, nondestructive contact measurement technique was employed to detect and characterize the elastic anisotropy of a free-standing, plasma-sprayed alumina coating. Following this initial evalu-ation, a computer-assisted, ultrasonic anisotropic test bed was used to determine the anisotropic elastic stiffness constants of coatings produced by plasma gun currents of 600 and 400 A. The results showed that the plasma-sprayed alumina coatings are transversely isotropic; i.e., isotropic in the spraying direction. These coatings were characterized by five independent elastic stiffness constants. Coatings produced at 600 A plasma gun current showed higher elastic stiffness constants than those produced at 400 A plasma gun current. This increase appeared to be related to a decrease in the porosity content of the coatings pro-duced at the higher plasma gun current.

Original languageEnglish (US)
Pages (from-to)367-373
Number of pages7
JournalJournal of Thermal Spray Technology
Volume4
Issue number4
DOIs
StatePublished - Jan 1 1995

Fingerprint

elastic anisotropy
Aluminum Oxide
Plasma guns
plasma guns
Anisotropy
Alumina
aluminum oxides
ultrasonics
Ultrasonics
Plasmas
coatings
Coatings
stiffness
Stiffness
test stands
spraying
Spraying
high current
Porosity
porosity

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Parthasarathi, S. ; Tittmann, Bernhard R. ; Sampath, K. ; Onesto, E. J. / Ultrasonic characterization of elastic anisotropy in plasma-sprayed alumina coatings. In: Journal of Thermal Spray Technology. 1995 ; Vol. 4, No. 4. pp. 367-373.
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Ultrasonic characterization of elastic anisotropy in plasma-sprayed alumina coatings. / Parthasarathi, S.; Tittmann, Bernhard R.; Sampath, K.; Onesto, E. J.

In: Journal of Thermal Spray Technology, Vol. 4, No. 4, 01.01.1995, p. 367-373.

Research output: Contribution to journalReview article

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AU - Tittmann, Bernhard R.

AU - Sampath, K.

AU - Onesto, E. J.

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