Transparent hydroxyapatite obtained through spark plasma sintering: Optical and mechanical properties

Zhong Li; Khiam Aik Khor

doi:10.4028/www.scientific.net.KEM.631.51

Transparent hydroxyapatite obtained through spark plasma sintering: Optical and mechanical properties

Zhong Li, Khiam Aik Khor^*

^*Corresponding author for this work

Nanyang Technological University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

11 Citations (Scopus)

Abstract

Transparent bioceramics have great potential for applications in the biomedical field as they facilitate direct observation of the interactions at biomaterial-cell/tissue interfaces. To date, the sintering of transparent hydroxyapatite (HA) has usually involved application of extraordinarily high pressure and/or long duration. This study attempts to fabricate transparent HA by a direct and fast Spark Plasma Sintering (SPS) process using three different types of raw powder: micro-spheres (MS), nano-rods (NR) and nano-spheres (NS). The optical and mechanical properties of the sintered pellets were examined and compared. The highest total forward transmittance (TFT) showed by sintered MS pellet (~2 mm thick) was 85% in the visible spectrum, whereas sintered NR and NS pellets were either translucent or opaque. Although lowest degree of transparency was observed for NS pellets, they demonstrated highest Young's modulus (E), hardness (H) and fracture toughness (K_IC). The eminent K_IC of NS pellets benefited mainly from its self-toughened microstructure.

Original language	English
Title of host publication	Bioceramics 26
Editors	Maria-Pau Ginebra, Cristina Canal, Montserrat Espanol, Edgar B. Montufar, Roman A. Perez
Publisher	Trans Tech Publications Ltd
Pages	51-56
Number of pages	6
ISBN (Electronic)	9783038352822
DOIs	https://doi.org/10.4028/www.scientific.net.KEM.631.51
Publication status	Published - 2015
Externally published	Yes
Event	26th Symposium and Annual Meeting of the International Society for Ceramics in Medicine, ISCM 2014 - Barcelona, Spain Duration: Nov 6 2014 → Nov 8 2014

Publication series

Name	Key Engineering Materials
Volume	631
ISSN (Print)	1013-9826
ISSN (Electronic)	1662-9795

Conference

Conference	26th Symposium and Annual Meeting of the International Society for Ceramics in Medicine, ISCM 2014
Country/Territory	Spain
City	Barcelona
Period	11/6/14 → 11/8/14

Bibliographical note

Publisher Copyright:
© (2015) Trans Tech Publications, Switzerland.

ASJC Scopus Subject Areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

Keywords

Hydroxyapatite
Mechanical properties
Spark Plasma Sintering
Transparency

Access to Document

10.4028/www.scientific.net.KEM.631.51

Cite this

@inproceedings{2ed2f1ddfca542e4a76e6ae7aaf62fa5,

title = "Transparent hydroxyapatite obtained through spark plasma sintering: Optical and mechanical properties",

abstract = "Transparent bioceramics have great potential for applications in the biomedical field as they facilitate direct observation of the interactions at biomaterial-cell/tissue interfaces. To date, the sintering of transparent hydroxyapatite (HA) has usually involved application of extraordinarily high pressure and/or long duration. This study attempts to fabricate transparent HA by a direct and fast Spark Plasma Sintering (SPS) process using three different types of raw powder: micro-spheres (MS), nano-rods (NR) and nano-spheres (NS). The optical and mechanical properties of the sintered pellets were examined and compared. The highest total forward transmittance (TFT) showed by sintered MS pellet (~2 mm thick) was 85% in the visible spectrum, whereas sintered NR and NS pellets were either translucent or opaque. Although lowest degree of transparency was observed for NS pellets, they demonstrated highest Young's modulus (E), hardness (H) and fracture toughness (KIC). The eminent KIC of NS pellets benefited mainly from its self-toughened microstructure.",

keywords = "Hydroxyapatite, Mechanical properties, Spark Plasma Sintering, Transparency",

author = "Zhong Li and Khor, {Khiam Aik}",

note = "Publisher Copyright: {\textcopyright} (2015) Trans Tech Publications, Switzerland.; 26th Symposium and Annual Meeting of the International Society for Ceramics in Medicine, ISCM 2014 ; Conference date: 06-11-2014 Through 08-11-2014",

year = "2015",

doi = "10.4028/www.scientific.net.KEM.631.51",

language = "English",

series = "Key Engineering Materials",

publisher = "Trans Tech Publications Ltd",

pages = "51--56",

editor = "Maria-Pau Ginebra and Cristina Canal and Montserrat Espanol and Montufar, {Edgar B.} and Perez, {Roman A.}",

booktitle = "Bioceramics 26",

}

Li, Z & Khor, KA 2015, Transparent hydroxyapatite obtained through spark plasma sintering: Optical and mechanical properties. in M-P Ginebra, C Canal, M Espanol, EB Montufar & RA Perez (eds), Bioceramics 26. Key Engineering Materials, vol. 631, Trans Tech Publications Ltd, pp. 51-56, 26th Symposium and Annual Meeting of the International Society for Ceramics in Medicine, ISCM 2014, Barcelona, Spain, 11/6/14. https://doi.org/10.4028/www.scientific.net.KEM.631.51

Transparent hydroxyapatite obtained through spark plasma sintering: Optical and mechanical properties. / Li, Zhong; Khor, Khiam Aik.
Bioceramics 26. ed. / Maria-Pau Ginebra; Cristina Canal; Montserrat Espanol; Edgar B. Montufar; Roman A. Perez. Trans Tech Publications Ltd, 2015. p. 51-56 (Key Engineering Materials; Vol. 631).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Transparent hydroxyapatite obtained through spark plasma sintering

T2 - 26th Symposium and Annual Meeting of the International Society for Ceramics in Medicine, ISCM 2014

AU - Li, Zhong

AU - Khor, Khiam Aik

N1 - Publisher Copyright: © (2015) Trans Tech Publications, Switzerland.

PY - 2015

Y1 - 2015

N2 - Transparent bioceramics have great potential for applications in the biomedical field as they facilitate direct observation of the interactions at biomaterial-cell/tissue interfaces. To date, the sintering of transparent hydroxyapatite (HA) has usually involved application of extraordinarily high pressure and/or long duration. This study attempts to fabricate transparent HA by a direct and fast Spark Plasma Sintering (SPS) process using three different types of raw powder: micro-spheres (MS), nano-rods (NR) and nano-spheres (NS). The optical and mechanical properties of the sintered pellets were examined and compared. The highest total forward transmittance (TFT) showed by sintered MS pellet (~2 mm thick) was 85% in the visible spectrum, whereas sintered NR and NS pellets were either translucent or opaque. Although lowest degree of transparency was observed for NS pellets, they demonstrated highest Young's modulus (E), hardness (H) and fracture toughness (KIC). The eminent KIC of NS pellets benefited mainly from its self-toughened microstructure.

AB - Transparent bioceramics have great potential for applications in the biomedical field as they facilitate direct observation of the interactions at biomaterial-cell/tissue interfaces. To date, the sintering of transparent hydroxyapatite (HA) has usually involved application of extraordinarily high pressure and/or long duration. This study attempts to fabricate transparent HA by a direct and fast Spark Plasma Sintering (SPS) process using three different types of raw powder: micro-spheres (MS), nano-rods (NR) and nano-spheres (NS). The optical and mechanical properties of the sintered pellets were examined and compared. The highest total forward transmittance (TFT) showed by sintered MS pellet (~2 mm thick) was 85% in the visible spectrum, whereas sintered NR and NS pellets were either translucent or opaque. Although lowest degree of transparency was observed for NS pellets, they demonstrated highest Young's modulus (E), hardness (H) and fracture toughness (KIC). The eminent KIC of NS pellets benefited mainly from its self-toughened microstructure.

KW - Hydroxyapatite

KW - Mechanical properties

KW - Spark Plasma Sintering

KW - Transparency

UR - http://www.scopus.com/inward/record.url?scp=84921739942&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84921739942&partnerID=8YFLogxK

U2 - 10.4028/www.scientific.net.KEM.631.51

DO - 10.4028/www.scientific.net.KEM.631.51

M3 - Conference contribution

AN - SCOPUS:84921739942

T3 - Key Engineering Materials

SP - 51

EP - 56

BT - Bioceramics 26

A2 - Ginebra, Maria-Pau

A2 - Canal, Cristina

A2 - Espanol, Montserrat

A2 - Montufar, Edgar B.

A2 - Perez, Roman A.

PB - Trans Tech Publications Ltd

Y2 - 6 November 2014 through 8 November 2014

ER -

Transparent hydroxyapatite obtained through spark plasma sintering: Optical and mechanical properties

Abstract

Publication series

Conference

Bibliographical note

ASJC Scopus Subject Areas

Keywords

Access to Document

Other files and links

Fingerprint

Cite this