The evaluation of integrity and elasticity of thermally sprayed ceramic coatings by ultrasonics: Dissertation

Pentti Kauppinen

Research output: ThesisDissertationMonograph

3 Citations (Scopus)

Abstract

In this study, methods for the evaluation of integrity and elasticity of thermally sprayed ceramic coatings have been developed. The main difficulty faced in the evaluation of the elasticity of ceramic coatings is the influence of the metallic substrate material on the values measured. Therefore the results may not be purely representing the properties of the coating. There is, however, a need to characterize the coatings used in industrial applications also during service. In this work, a new type of ultrasonic transducer for the measurement of propagation velocities of ultrasonic waves in coatings was developed. The novel structure of the transducer is based on the use of a piezoelectric plastic foil as the active ultrasonic element. The applicability of the transducer was tested with numerous coated specimens.
Original languageEnglish
QualificationDoctor Degree
Awarding Institution
  • Aalto University
Supervisors/Advisors
  • Korhonen, Antti, Supervisor, External person
Award date14 Nov 1997
Place of PublicationEspoo
Publisher
Print ISBNs951-38-5078-1
Publication statusPublished - 1997
MoE publication typeG4 Doctoral dissertation (monograph)

Fingerprint

ceramic coatings
sprayed coatings
integrity
transducers
elastic properties
ultrasonics
coatings
evaluation
propagation velocity
ultrasonic radiation
foils
plastics

Keywords

  • ceramic coatings
  • sprayed coatings
  • ultrasonic tests
  • elastic properties
  • piezoelectric transducers
  • acoustic velocity

Cite this

Kauppinen, Pentti. / The evaluation of integrity and elasticity of thermally sprayed ceramic coatings by ultrasonics : Dissertation. Espoo : VTT Technical Research Centre of Finland, 1997. 130 p.
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abstract = "In this study, methods for the evaluation of integrity and elasticity of thermally sprayed ceramic coatings have been developed. The main difficulty faced in the evaluation of the elasticity of ceramic coatings is the influence of the metallic substrate material on the values measured. Therefore the results may not be purely representing the properties of the coating. There is, however, a need to characterize the coatings used in industrial applications also during service. In this work, a new type of ultrasonic transducer for the measurement of propagation velocities of ultrasonic waves in coatings was developed. The novel structure of the transducer is based on the use of a piezoelectric plastic foil as the active ultrasonic element. The applicability of the transducer was tested with numerous coated specimens.",
keywords = "ceramic coatings, sprayed coatings, ultrasonic tests, elastic properties, piezoelectric transducers, acoustic velocity",
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language = "English",
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The evaluation of integrity and elasticity of thermally sprayed ceramic coatings by ultrasonics : Dissertation. / Kauppinen, Pentti.

Espoo : VTT Technical Research Centre of Finland, 1997. 130 p.

Research output: ThesisDissertationMonograph

TY - THES

T1 - The evaluation of integrity and elasticity of thermally sprayed ceramic coatings by ultrasonics

T2 - Dissertation

AU - Kauppinen, Pentti

N1 - UKD: 666.3:620.179.16:621.383.3

PY - 1997

Y1 - 1997

N2 - In this study, methods for the evaluation of integrity and elasticity of thermally sprayed ceramic coatings have been developed. The main difficulty faced in the evaluation of the elasticity of ceramic coatings is the influence of the metallic substrate material on the values measured. Therefore the results may not be purely representing the properties of the coating. There is, however, a need to characterize the coatings used in industrial applications also during service. In this work, a new type of ultrasonic transducer for the measurement of propagation velocities of ultrasonic waves in coatings was developed. The novel structure of the transducer is based on the use of a piezoelectric plastic foil as the active ultrasonic element. The applicability of the transducer was tested with numerous coated specimens.

AB - In this study, methods for the evaluation of integrity and elasticity of thermally sprayed ceramic coatings have been developed. The main difficulty faced in the evaluation of the elasticity of ceramic coatings is the influence of the metallic substrate material on the values measured. Therefore the results may not be purely representing the properties of the coating. There is, however, a need to characterize the coatings used in industrial applications also during service. In this work, a new type of ultrasonic transducer for the measurement of propagation velocities of ultrasonic waves in coatings was developed. The novel structure of the transducer is based on the use of a piezoelectric plastic foil as the active ultrasonic element. The applicability of the transducer was tested with numerous coated specimens.

KW - ceramic coatings

KW - sprayed coatings

KW - ultrasonic tests

KW - elastic properties

KW - piezoelectric transducers

KW - acoustic velocity

M3 - Dissertation

SN - 951-38-5078-1

T3 - VTT Publications

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Kauppinen P. The evaluation of integrity and elasticity of thermally sprayed ceramic coatings by ultrasonics: Dissertation. Espoo: VTT Technical Research Centre of Finland, 1997. 130 p.