Characterisation of transparent hydroxyapatite nanoceramics prepared by spark plasma sintering

Title
Characterisation of transparent hydroxyapatite nanoceramics prepared by spark plasma sintering
Author(s)
한영환윤존도[윤존도]김석영김병남[김병남]에카[에카]손형원
Keywords
BONE
Issue Date
201402
Publisher
MANEY PUBLISHING
Citation
ADVANCES IN APPLIED CERAMICS, v.113, no.2, pp.67 - 72
Abstract
Hydroxyapatites (HA) have good biocompatibility and are used as bioceramics for artificial bones. The application areas can be extended further if transparent and dense HA ceramics can be prepared. The preparation of dense and transparent HA ceramics were attempted using a spark plasma sintering technique at relatively low temperatures (900-1000 degrees C) under a pressure of 80 MPa for a short time of 10 min. The sintered body was almost fully dense (> 99%) and transparent with a transmittance >70%. The microstructure was examined by SEM, TEM, STEM and EDX. The HA ceramics exhibited a microstructure with grains, approximately 100 nm size. A number of intragranular voids, 5-10 nm in size, with flat boundaries were also observed. The voids were believed to have been generated by evaporation during spark plasma sintering and were stabilised during cooling. The grain boundaries were clean without a glassy phase.
URI
http://hdl.handle.net/YU.REPOSITORY/33327http://dx.doi.org/10.1179/1743676113Y.0000000079
ISSN
1743-6753
Appears in Collections:
공과대학 > 신소재공학부 > Articles
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