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Effect of Nano‐Zirconia on the Mechanical and Biological Properties of Calcium Silicate Scaffolds
Author(s) -
Shuai Cijun,
Feng Pei,
Yang Bo,
Cao Yiyuan,
Min Anjie,
Peng Shuping
Publication year - 2014
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12337
Subject(s) - materials science , calcium silicate , apatite , cubic zirconia , chemical engineering , phase (matter) , nano , microstructure , sintering , composite material , compressive strength , tetragonal crystal system , fracture toughness , toughness , ceramic , chemistry , organic chemistry , engineering
The calcium silicate ( CaSiO 3 ) scaffolds added with 0, 10, 20, 30, and 40 wt% nano‐zirconia (nano‐ ZrO 2 ) with controlable porous structure were fabricated via selective laser sintering. The effects of nano‐ ZrO 2 content on the microstructure, crystalline phase, and mechanical and biological properties were investigated. The results showed that the compressive strength and fracture toughness of the scaffolds were enhanced by the addition of nano‐ ZrO 2 , and the phase transformation of monoclinic phase (m‐ ZrO 2 ) into tetragonal phase (t‐ ZrO 2 ) occurred, which was favorable for the reinforcing ability of ZrO 2 due to the stress‐induced phase transformation toughening mechanism. However, the excessive amount of nano‐ ZrO 2 would cause undesired agglomeration, poor sinterability, and weak apatite‐forming ability. In vitro results showed that there were bone‐like apatite layer formation and MG ‐63 cells attachment on the surfaces of the scaffolds, indicating the scaffolds possessed good biological properties.