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Nanoindentation Characterization of the Hardness of Zirconia Dental Ceramics
Author(s) -
Shao Longquan,
Jiang Danyu,
Gong Jianghong
Publication year - 2013
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201200367
Subject(s) - nanoindentation , materials science , indentation , cubic zirconia , characterization (materials science) , ceramic , composite material , indentation hardness , dental ceramics , microstructure , nanotechnology
Abstract Hardness characterization is a key issue for the evaluation of the resistance to contact damage of dental materials. In this study, nanoindentation tests were conducted on four commercial zirconia dental ceramics. For each material, the measured nanohardness exhibits significant indentation size effect, i.e., the measured hardness decreases with increasing peak load. The so‐called load‐independent nanohardness was determined based on a second‐order polynomial analysis of the variation of the contact depth with the peak load. Finally, a brief discussion was conducted on the reliability and the applicability of the determined load‐independent nanohardness.