Open AccessNanocrystalline Hydroxyapatite Ceramics Prepared by Hydrolysis in Polyol Medium, Microstructure and Mechanical Properties after Spark Plasma Sintering
Author(s) -
Abderrahmen Mechay,
N. Jouini,
Frédéric Schoenstein,
Florent Tétard,
Hafed El Feki
Publication year - 2013
Publication title -
journal of advances in chemistry
Language(s) - English
Resource type - Journals
ISSN - 2321-807X
DOI - 10.24297/jac.v6i3.6594
Subject(s) - spark plasma sintering , materials science , nanocrystalline material , microstructure , sintering , ceramic , fracture toughness , indentation hardness , vickers hardness test , polyol , decomposition , composite material , chemical engineering , chemistry , nanotechnology , organic chemistry , engineering , polyurethane
This Letter describes a new approach for the synthesis of hydroxyapatite (HA) nanoparticles by polyol process has been successfully conducted by spark plasma sintering process, resulting in a dense hydroxyapatite compacts. Besides, the sintering behaviour of hydroxyapatite powders at different temperatures ranging from 800°C to 950°C at 50 MPa was studied. The microstructure, Vickers microhardness, fracture toughness and density are described. The suitable sintering condition under the pressure of 50 MPa is 900°C for 5 min. A maximum value of the density was reached at around 900°C, and then decreased with further increase in the temperature due to the decomposition of hydroxyapatite into β-tricalcium phosphates.