Simulation of Hardness Testing on Plasma‐Sprayed Coatings

Chung‐Kwei ‐K Lin, Chung‐Chieh ‐C Lin, Christopher C. Berndt

研究成果: 雜誌貢獻文章

11 引文 (Scopus)

摘要

A plasma‐sprayed thermal barrier coating consisting of a NiCoCrAlY bond coat and Ce‐stabilized zirconia ceramic coating was heat‐treated at 400°C for 1000 h. Microhardness measurements were used to evaluate microstructural variations throughout the coating. One hundred and twenty measurements were performed at both the bond coat and ceramic coating positions within the thermal barrier coating system. Both data sets were analyzed to assess whether they could be described as Gaussian (i. e., “normal”) or Weibull distributions. The influence of the sample size, i. e., the number of microhardness tests for a group, on the mean hardness value was also evaluated by a Monte Carlo simulation procedure. The mean value, the standard deviation, the coefficient of variation, and the Weibull modulus for the subsets of data were calculated to assess these effects. The confidence for the mean value was also considered. The results indicated that the reliability of the microhardness test improved as the sample size increased. At least 20 measurements were needed to distinguish differences in micro‐hardness between the bond coat and the ceramic coating at a 95% confidence level.
原文英語
頁(從 - 到)1406-1410
頁數5
期刊Journal of the American Ceramic Society
78
發行號5
DOIs
出版狀態已發佈 - 1995
對外發佈Yes

指紋

Hardness testing
Microhardness
Ceramic coatings
Coatings
Thermal barrier coatings
Weibull distribution
Normal distribution
Zirconia
Hardness

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

引用此文

Simulation of Hardness Testing on Plasma‐Sprayed Coatings. / Lin, Chung‐Kwei ‐K; Lin, Chung‐Chieh ‐C; Berndt, Christopher C.

於: Journal of the American Ceramic Society, 卷 78, 編號 5, 1995, p. 1406-1410.

研究成果: 雜誌貢獻文章

Lin, Chung‐Kwei ‐K ; Lin, Chung‐Chieh ‐C ; Berndt, Christopher C. / Simulation of Hardness Testing on Plasma‐Sprayed Coatings. 於: Journal of the American Ceramic Society. 1995 ; 卷 78, 編號 5. 頁 1406-1410.
@article{f400ef93306e498f88c698156ae6e5f7,
title = "Simulation of Hardness Testing on Plasma‐Sprayed Coatings",
abstract = "A plasma‐sprayed thermal barrier coating consisting of a NiCoCrAlY bond coat and Ce‐stabilized zirconia ceramic coating was heat‐treated at 400°C for 1000 h. Microhardness measurements were used to evaluate microstructural variations throughout the coating. One hundred and twenty measurements were performed at both the bond coat and ceramic coating positions within the thermal barrier coating system. Both data sets were analyzed to assess whether they could be described as Gaussian (i. e., “normal”) or Weibull distributions. The influence of the sample size, i. e., the number of microhardness tests for a group, on the mean hardness value was also evaluated by a Monte Carlo simulation procedure. The mean value, the standard deviation, the coefficient of variation, and the Weibull modulus for the subsets of data were calculated to assess these effects. The confidence for the mean value was also considered. The results indicated that the reliability of the microhardness test improved as the sample size increased. At least 20 measurements were needed to distinguish differences in micro‐hardness between the bond coat and the ceramic coating at a 95{\%} confidence level.",
author = "Lin, {Chung‐Kwei ‐K} and Lin, {Chung‐Chieh ‐C} and Berndt, {Christopher C.}",
year = "1995",
doi = "10.1111/j.1151-2916.1995.tb08505.x",
language = "English",
volume = "78",
pages = "1406--1410",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley-Blackwell",
number = "5",

}

TY - JOUR

T1 - Simulation of Hardness Testing on Plasma‐Sprayed Coatings

AU - Lin, Chung‐Kwei ‐K

AU - Lin, Chung‐Chieh ‐C

AU - Berndt, Christopher C.

PY - 1995

Y1 - 1995

N2 - A plasma‐sprayed thermal barrier coating consisting of a NiCoCrAlY bond coat and Ce‐stabilized zirconia ceramic coating was heat‐treated at 400°C for 1000 h. Microhardness measurements were used to evaluate microstructural variations throughout the coating. One hundred and twenty measurements were performed at both the bond coat and ceramic coating positions within the thermal barrier coating system. Both data sets were analyzed to assess whether they could be described as Gaussian (i. e., “normal”) or Weibull distributions. The influence of the sample size, i. e., the number of microhardness tests for a group, on the mean hardness value was also evaluated by a Monte Carlo simulation procedure. The mean value, the standard deviation, the coefficient of variation, and the Weibull modulus for the subsets of data were calculated to assess these effects. The confidence for the mean value was also considered. The results indicated that the reliability of the microhardness test improved as the sample size increased. At least 20 measurements were needed to distinguish differences in micro‐hardness between the bond coat and the ceramic coating at a 95% confidence level.

AB - A plasma‐sprayed thermal barrier coating consisting of a NiCoCrAlY bond coat and Ce‐stabilized zirconia ceramic coating was heat‐treated at 400°C for 1000 h. Microhardness measurements were used to evaluate microstructural variations throughout the coating. One hundred and twenty measurements were performed at both the bond coat and ceramic coating positions within the thermal barrier coating system. Both data sets were analyzed to assess whether they could be described as Gaussian (i. e., “normal”) or Weibull distributions. The influence of the sample size, i. e., the number of microhardness tests for a group, on the mean hardness value was also evaluated by a Monte Carlo simulation procedure. The mean value, the standard deviation, the coefficient of variation, and the Weibull modulus for the subsets of data were calculated to assess these effects. The confidence for the mean value was also considered. The results indicated that the reliability of the microhardness test improved as the sample size increased. At least 20 measurements were needed to distinguish differences in micro‐hardness between the bond coat and the ceramic coating at a 95% confidence level.

UR - http://www.scopus.com/inward/record.url?scp=84986409093&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84986409093&partnerID=8YFLogxK

U2 - 10.1111/j.1151-2916.1995.tb08505.x

DO - 10.1111/j.1151-2916.1995.tb08505.x

M3 - Article

AN - SCOPUS:84986409093

VL - 78

SP - 1406

EP - 1410

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

SN - 0002-7820

IS - 5

ER -