Paper Title:
Comparison of the Low Temperature Degradation Properties of Two Y-TZP Ceramics for Dental Applications
  Abstract

The purpose of this study was to investigate the influence of in vitro low-temperature degradation (LTD) treatments on the structural stability and mechanical properties of two commercial Y-TZP ceramics candidate for dental application. TZ-3YS and TZ-3YS-E powder were chosen because of there minor differences of chemical composition. The two powders were compacted at 200MPa using cold isostatic pressure, and densely sintered at 1500°C and 1450°C for 2hr respectively. Two methods of in vitro LTD treatments were performed, the first is to autoclave specimens in steam at 134°C, 2bar, for 1 to 5hr; the second is to immerse specimens into 4% acetic acid at 80°C for 168 hr. XRD was used to identify the crystal phases, flexural strength were tested according to ISO 6872 standard, surface microstructure was evaluated by Atomic Force Microscopy (AFM). Results show that the relative content of monoclinic phase was increasing with the prolonged aging time, the TZ-3YS was more sensitive to LTD compared with TZ-3YS-E. LTD tests did not necessary reduce the flexural strength of Y-TZP ceramics, the nucleation and growth of monoclinic phase were detected by AFM, and the surface microstructure induced by LTD was not identical between the two Y-TZP ceramics. AFM was a sensitive method to evaluate the transformation of Y-TZP ceramics. To choose appropriate Y-TZP powder for dental application, it is mandatory to examine the microstructure before and after LTD.

  Info
Periodical
Edited by
Yiwang Bao, Danyu Jiang, Li Tian and Jianghong Gong
Pages
107-111
DOI
10.4028/www.scientific.net/KEM.492.107
Citation
Y. F. Yi, N. Wen, X. L. Wang, L. Q. Shao, C. Wang, "Comparison of the Low Temperature Degradation Properties of Two Y-TZP Ceramics for Dental Applications", Key Engineering Materials, Vol. 492, pp. 107-111, 2012
Online since
September 2011
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: Sabine Begand, Thomas Oberbach, Wilfried Glien, J. Schneider
Abstract:Alumina and zirconia ceramics have been successfully used as materials for joint endoprostheses. The present study has been aimed at...
763
Authors: Xi Wu Li, Bai Qing Xiong, Yon Gan Zhang, Guo Jun Wang, Zhi Hui Li, Bao Hong Zhu, Feng Wang, Hong Wei Liu
Abstract:In this study, the effect of various aging treatment (T6 and T7 treatment) on the mechanical properties, electrical conductivity and the...
273
Authors: Zhong Bo Zhou, Jin Shan Li, Hong Chao Kou, Zhi Shou Zhu, Bin Tang, Hui Chang
Abstract:In order to develop a perspective of the new metastable β titanium alloy——TB-13, the influence of ageing treatments on the microstructure and...
859
Authors: Qian Zhao, Yong Kang Zhang, Cheng Yun Cui, Xi Gui Cui, Jin Zhong Lu
Abstract:Co-based alloy coating was fabricated by powder feeding laser cladding on T10 tool steel. The microstructure and phase composition were...
694
Authors: Long Fei Zuo, Zhan Lei Wei, Ri Ni, Ben Ma, Zi Dong Wang
Chapter 1: Material Science and Engineering
Abstract:A kind of 1000MPa low carbon bainitic steel belonged to the Fe-Cu-Nb series was hot rolled and aged, the influence of aging temperatures on...
376