Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/96560
Title: Role of in-flight temperature and velocity of powder particles on plasma sprayed hydroxyapatite coating characteristics
Authors: Cizek, Jan
Khor, Khiam Aik
Issue Date: 2011
Source: Cizek, J., & Khor, K. A. (2012). Role of in-flight temperature and velocity of powder particles on plasma sprayed hydroxyapatite coating characteristics. Surface and Coatings Technology, 206(8-9), 2181-2191.
Series/Report no.: Surface and coatings technology
Abstract: This paper presents a systematic research on the process of thermal spraying of HA encompassing all stages of layer deposition: powder production and characterization (optimized production led to spherical 39.90 ± 10.61 μm powder with 0.0% content of tri-calcium phosphate [TCP] or tetra-calcium phosphate [TTCP] phases), plasma jet properties influence on the in-flight powder properties (major influence of spray distance factor), the influence of the in-flight temperature and velocity of hydroxyapatite powder particles (ranges of 2294 K–2708 K and 152 m·s−1–291 m·s−1) on the final characteristics of the deposited coatings. Six combinations of the system parameters leading the low-medium-high in-flight properties were selected and the respective coatings were investigated, with some data in contradiction to previously published results. It was found that the temperature of the particles plays a critical role for the development of detrimental CaO (content increase of up to 14.6%) and metastable TTCP (up to 49.5%) phases in the coatings. Particle in-flight velocity was found to influence the open porosity of the coatings (8.8%–27.9%) and has an impact on the micro-hardness and moduli of the coatings (relative differences of up to 2.8×). Joint incidence of both in-flight properties was found to significantly influence the microstructure of the coatings and its respective surface roughness levels (Ra = 7.4–19.4 μm). The morphology of impinging splats was found to be influenced by both the in-flight velocity (dominant factor) and temperature (secondary factor) of the HA particles.
URI: https://hdl.handle.net/10356/96560
http://hdl.handle.net/10220/10331
ISSN: 0257-8972
DOI: 10.1016/j.surfcoat.2011.09.058
Rights: © 2011 Elsevier B.V.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MAE Journal Articles

SCOPUSTM   
Citations 5

39
Updated on Mar 5, 2021

PublonsTM
Citations 10

34
Updated on Mar 7, 2021

Page view(s) 50

325
Updated on Apr 18, 2021

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.