Paper Title:
Statistical Analysis on Bonding Strength and Failure Mechanism of Plasma-Sprayed HA Coating with Reinforced Intermediate Layers
  Abstract

Experimental results showed that both of commercial pure titanium (CP-Ti) and yttria-stabilized zirconia (YSZ) intermediate layers significantly enhanced the bonding strength of HACs (one-way ANOVA test, p < 0.05). On the basis of fracture morphologies and bonding strength data fluctuation, the Weibull model provided a powerful statistical analysis for assessing the failure mechanism and the reliability of composite coatings. Plasma-sprayed HACs were reliable materials with a right-shift wear-out failure model (m > 3) of increasing failure rate (IFR). The HA composite coatings remained in tack on the substrate, which represented better reliability and less dissociation for further applications. The measured bonding strength of HACs was a combination of adhesive and cohesive strength of a coating layer. The area fraction of adhesive failure tended to decrease with introducing the reinforced intermediate layer, especially for the HA/YSZ composite coating. The decrease of adhesive failure area fraction represented good interlocking between the coating/substrate interfaces. The knowledge of fracture behaviour in HACs with reinforced intermediate layers will be very helpful for the understanding and prediction of the bonding strength.

  Info
Periodical
Advanced Materials Research (Volumes 47-50)
Edited by
Alan K.T. Lau, J. Lu, Vijay K. Varadan, F.K. Chang, J.P. Tu and P.M. Lam
Pages
1007-1010
DOI
10.4028/www.scientific.net/AMR.47-50.1007
Citation
C. W. Yang, T. S. Lui, "Statistical Analysis on Bonding Strength and Failure Mechanism of Plasma-Sprayed HA Coating with Reinforced Intermediate Layers", Advanced Materials Research, Vols. 47-50, pp. 1007-1010, 2008
Online since
June 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Cheng Yun Ning, Ying Jun Wang, W.W. Lu, Xiao Feng Chen, Gang Wu, Na Ru Zhao
Abstract:For practical applications such as artifical joints and dental implants, there is a strong demand for hydroxyapatite coatings with excellent...
1893
Authors: Xiao Bing Zhao, Xuan Yong Liu, Chuan Xian Ding
Abstract:TiO2 coatings on titanium alloy substrates were prepared by atmospheric plasma spraying using commercial nano-powders. Then, as-sprayed...
13
Authors: Cheng Yun Ning, Ying Jun Wang, Xiao Feng Chen, Jian Dong Ye, Gang Wu, Na Ru Zhao
Abstract:In the present study, bioactive functional gradient coatings were prepared using net-energy controlled plasma spraying technology. The...
1676
Authors: Chung Wei Yang, Truan Sheng Lui, Edward Chang
Abstract:The effect of autoclaving hydrothermal treatment on the characteristics of plasma-sprayed hydroxyapatite (HA) coatings on the Ti-6Al-4V...
147
Authors: Dong Sheng Wang, Zong Jun Tian, Bin Yang, Li Da Shen
Abstract:In this study, ZrO2-7wt.%Y2O3 thermal barrier coatings (TBCs) were prepared on TiAl base intermetallic alloy substrates by plasma spraying...
191