mirage

TEM and STEM analysis on heat-treated and in vitro plasma-sprayed hydroxyapatite/Ti-6Al-4V composite coatings

DSpace/Manakin Repository

 

Search DR-NTU


Advanced Search Subject Search

Browse

My Account

TEM and STEM analysis on heat-treated and in vitro plasma-sprayed hydroxyapatite/Ti-6Al-4V composite coatings

Show full item record

Title: TEM and STEM analysis on heat-treated and in vitro plasma-sprayed hydroxyapatite/Ti-6Al-4V composite coatings
Author: Dong, Zhili; Khor, Khiam Aik; Quek, C. H.; White, Timothy John; Cheang, P.
Copyright year: 2003
Abstract: A cogent understanding of the microstructure, and indeed nano-structure, of hydroxyapatite (HA) and the interface between Ti-6Al-4V and HA is crucial to its appropriateness as a biomaterials. This paper reports the analysis of plasma-sprayed HA/Ti-6Al-4V composites by transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM) to elucidate the intricate nature of the materials following plasma spray processing and in vitro evaluation. The novel Ti-6Al-4V/HA composite coating, with approximately 48 wt% HA, had demonstrated attractive tensile adhesion strength (~28 MPa) and improved Young’s modulus (~ 55 GPa). Experimental results demonstrated that amorphous calcium phosphate and fine HA grains were formed during rapid splat solidification in the as-sprayed composite coatings. Small Ti-6Al-4V grains were observed adjacent to the amorphous calcium phosphate. The coatings were further heat treated at 600°C for 6 h, and significant crystallisation of the amorphous calcium phosphate phase took place. However, complete crystallisation was not achieved at this temperature, as the coatings invariably contained a small amount of amorphous calcium phosphate phase in some local regions. After immersion in simulated body fluid for 2 weeks and 10 weeks, TEM and STEM confirmed that the interfaces inside the coating maintained good microstructural integrity.
Subject: DRNTU::Engineering::Materials.
Type: Journal Article
Series/ Journal Title: Biomaterials
School: School of Materials Science and Engineering
Rights: © 2002 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Biomaterials, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1016/S0142-9612(02)00267-3]
Version: Accepted version

Files in this item

Files Size Format View
76. TEM and STEM analysis on heat.pdf 701.0Kb PDF View/Open
   

DOI Query

- Get published version (via Digital Object Identifier)
   

This item appears in the following Collection(s)

Show full item record

Statistics

Total views

All Items Views
TEM and STEM analysis on heat-treated and in vitro plasma-sprayed hydroxyapatite/Ti-6Al-4V composite coatings 372

Total downloads

All Bitstreams Views
76. TEM and STEM analysis on heat.pdf 260

Top country downloads

Country Code Views
United States of America 68
China 63
Singapore 48
India 15
Germany 7

Top city downloads

city Views
Mountain View 53
Beijing 52
Singapore 48
Ludhiana 6
Kiez 4