Mechanical Properties of Dental Zirconia Ceramics Changed with Sandblasting and Heat Treatment

• SATO Hideo

  Department of Biomaterials Science, Graduate School of Medical and Dental Sciences, Kagoshima University

• YAMADA Kiyotaka

  Ceramic Physics Laboratory and Research Institute for Nanoscience, Kyoto Institute of Technology

• PEZZOTTI Giuseppe

  Ceramic Physics Laboratory and Research Institute for Nanoscience, Kyoto Institute of Technology

• NAWA Masahiro

  Central Research Laboratory, Matsushita Electric Works, Ltd.

• BAN Seiji

  Department of Biomaterials Science, Graduate School of Medical and Dental Sciences, Kagoshima University

Bibliographic Information

Other Title

• Mechanical property of dental zirconia ceramics changed with sandblasting and heat treatment

Abstract

Two types of tetragonal zirconia polycrystals (TZP), a ceria-stabilized TZP/Al₂O₃ nanocomposite (CZA) and a conventional yttria-stabilized TZP (Y-TZP), were sandblasted with 70-μm alumina and 125-μm SiC powders, then partially annealed at 500—1200°C for five minutes. Monoclinic ZrO₂ content was determined by X-ray diffractometry and Raman spectroscopy. Biaxial flexure test was conducted on the specimens before and after the treatments. Monoclinic ZrO₂ content and biaxial flexure strength increased after sandblasting, but decreased after heat treatment. However, in both cases, the strength of CZA was higher than that of Y-TZP. Raman spectroscopy showed that a compressive stress field was introduced on the sample surface after sandblasting. It was concluded that sandblasting induced tetragonal-to-monoclinic phase transformation and that the volume expansion associated with such a phase transformation gave rise to an increase in compressive stress on the surface of CZA. With the occurrence of such a strengthening mechanism in the microstructure, it was concluded that CZA was more susceptible to stress-induced transformation than Y-TZP.

Journal

• Dental Materials Journal

  Dental Materials Journal 27 (3), 408-414, 2008

  The Japanese Society for Dental Materials and Devices

Keywords

• Zirconia
• Sandblasting
• Heat treatment

Details

• CRID: 1390282679692156672
• NII Article ID: 110006742424
• NII Book ID: AA10443149
• DOI: 10.4012/dmj.27.408
• COI: 1:CAS:528:DC%2BD1cXpslWqu7g%3D
• ISSN: 18811361
• ISSN: 02874547
• PubMed: 18717169
• Web Site: https://www.jstage.jst.go.jp/article/dmj/27/3/27_3_408/_pdf
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10745185
• Web Site: https://search.jamas.or.jp/link/ui/2008358502
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • PubMed
  • NDL-Digital
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed