You need JavaScript to view this

Mechanical properties of EB-PVD ZrO{sub 2} thermal barrier coatings; Mechanische Eigenschaften von EB-PVD ZrO{sub 2} Waermedaemmschichten

Abstract

In this work, the elastic properties of thermal barrier coatings which were produced by electron-beam enhanced physical vapour deposition were investigated, as well as the dependency of the properties on the sample microstructure, the thermal treatment and the test method. For this purpose, not only commercial coatings were characterized, but also special sample material was used which consists of a 1 mm thick layer of EB-PVD TBC. This material was isothermally heat treated for different times at 950 C, 1100 C and 1200 C and then tested in a specially developed miniaturized bend test and by dynamic mechanical analysis. The sample material was tested by nanoindentation in order to measure the Young's modulus on a local scale, and the porosity of the samples was determined by microstructure analysis and porosimetry. The decrease of porosity could be connected with sintering and subsequent stiffening of the material. The test results are dependent on the tested volume. A small test volume leads to larger measured Young's moduli, while a large test volume yields lower values. The test volume also has an influence on the increase of stiffness during thermal exposure. With a small tested volume, a quicker increase of the Young's modulus was  More>>
Authors:
Publication Date:
Aug 29, 2014
Product Type:
Thesis/Dissertation
Resource Relation:
Other Information: Diss. (Dr.-Ing.)
Subject:
36 MATERIALS SCIENCE; BACKSCATTERING; ELECTRON BEAMS; HEAT TREATMENTS; MECHANICAL PROPERTIES; MICROSTRUCTURE; PHYSICAL VAPOR DEPOSITION; POROSITY; PROTECTIVE COATINGS; SINTERED MATERIALS; THERMAL BARRIERS; ZIRCONIUM OXIDES
OSTI ID:
22400020
Research Organizations:
Erlangen-Nuernberg Univ., Erlangen (Germany). Technische Fakultaet
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
TRN: DE15F3694105777
Availability:
Available from: https://opus4.kobv.de/opus4-fau/files/5744/Diss_Held_2014.pdf
Submitting Site:
DE
Size:
109 page(s)
Announcement Date:
Nov 12, 2015

Citation Formats

Held, Carolin. Mechanical properties of EB-PVD ZrO{sub 2} thermal barrier coatings; Mechanische Eigenschaften von EB-PVD ZrO{sub 2} Waermedaemmschichten. Germany: N. p., 2014. Web.
Held, Carolin. Mechanical properties of EB-PVD ZrO{sub 2} thermal barrier coatings; Mechanische Eigenschaften von EB-PVD ZrO{sub 2} Waermedaemmschichten. Germany.
Held, Carolin. 2014. "Mechanical properties of EB-PVD ZrO{sub 2} thermal barrier coatings; Mechanische Eigenschaften von EB-PVD ZrO{sub 2} Waermedaemmschichten." Germany.
@misc{etde_22400020,
title = {Mechanical properties of EB-PVD ZrO{sub 2} thermal barrier coatings; Mechanische Eigenschaften von EB-PVD ZrO{sub 2} Waermedaemmschichten}
author = {Held, Carolin}
abstractNote = {In this work, the elastic properties of thermal barrier coatings which were produced by electron-beam enhanced physical vapour deposition were investigated, as well as the dependency of the properties on the sample microstructure, the thermal treatment and the test method. For this purpose, not only commercial coatings were characterized, but also special sample material was used which consists of a 1 mm thick layer of EB-PVD TBC. This material was isothermally heat treated for different times at 950 C, 1100 C and 1200 C and then tested in a specially developed miniaturized bend test and by dynamic mechanical analysis. The sample material was tested by nanoindentation in order to measure the Young's modulus on a local scale, and the porosity of the samples was determined by microstructure analysis and porosimetry. The decrease of porosity could be connected with sintering and subsequent stiffening of the material. The test results are dependent on the tested volume. A small test volume leads to larger measured Young's moduli, while a large test volume yields lower values. The test volume also has an influence on the increase of stiffness during thermal exposure. With a small tested volume, a quicker increase of the Young's modulus was registered, which could be associated to the sintering of local structures.}
place = {Germany}
year = {2014}
month = {Aug}
}