Mechanism of superplastic deformed transparent hydroxyapatite

Title
Mechanism of superplastic deformed transparent hydroxyapatite
Author(s)
한영환윤존도[윤존도]손형원[손형원]BN Kim[BN Kim]김석영H. Yoshida[H. Yoshida]
Keywords
CAVITATION; ZIRCONIA; DEFORMATION; CREEP
Issue Date
201504
Publisher
MANEY PUBLISHING
Citation
ADVANCES IN APPLIED CERAMICS, v.114, no.3, pp.175 - 177
Abstract
Superplastic deformed hydroxyapatite (HA) samples were examined by TEM to elucidate the deformation mechanism in the HA. The present paper was to study the main mechanism of the superplastic behaviour of nanocrystalline transparent HA with a mean grain size of 170 nm fabricated by spark plasma sintering, which has exhibited superplasticity at temperatures ranging from 950 to 1050 degrees C with a maximum elongation of 486% at 1000 degrees C at an initial strain rate of 1.0 x 10(-4) s(-1). The post-deformation microstructure of HA indicated that activated dislocation motion assisted grain boundary sliding was the predominant mechanism of superplastic flow with the values of the stress exponent, 4 to 5, according to a theoretical model of interface reaction controlled creep. Unexpectedly, no dislocation was observed by TEM.
URI
http://hdl.handle.net/YU.REPOSITORY/32688http://dx.doi.org/10.1179/1743676114Y.0000000217
ISSN
1743-6753
Appears in Collections:
공과대학 > 신소재공학부 > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE