The Effect of Particle Size on the Mechanical and Microstructural Properties of Freeze-Casted Macroporous Hydroxyapatite Scaffolds

Two different hydroxyapatites with the particle sizes of 3.9 and 1.69 μm were chosen. Slurries with initial hydroxyapatite concentration of 15 vol% were prepared. Different cooling rates from 2 to 14°C/min were utilized. The specimens were sintered at different temperatures of 1250–1350°C. The phase...

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Bibliographic Details
Published inInternational journal of applied ceramic technology Vol. 11; no. 1; pp. 12 - 21
Main Authors Zamanian, Ali, Farhangdoust, Sajad, Yasaei, Mana, Khorami, Mina, Hafezi, Masoud
Format Journal Article
LanguageEnglish
Published Malden Blackwell Publishing Ltd 01.01.2014
Wiley Subscription Services, Inc
Subjects
Cooling rate
Diffraction
Hydroxyapatite
Microstructure
Particle size
Porosity
Scaffolds
Sintering
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Summary:Two different hydroxyapatites with the particle sizes of 3.9 and 1.69 μm were chosen. Slurries with initial hydroxyapatite concentration of 15 vol% were prepared. Different cooling rates from 2 to 14°C/min were utilized. The specimens were sintered at different temperatures of 1250–1350°C. The phase composition (by X‐Ray Diffraction), microstructure (by Scanning Electron Microscopy), mechanical characteristics, and the porosity of sintered samples were assessed. The porosity of the sintered samples was in range of ~57–83%, and the compressive strength varied from ~1.7 to 15 MPa. The mechanical strength of the scaffolds increased as a function of cooling rate and sintering temperature.
Bibliography:istex:953976C4B80149B6B611676ED23F7824DA34FECA
ArticleID:IJAC12031
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ISSN:1546-542X
1744-7402
DOI:10.1111/ijac.12031