Next Article in Journal
Correction: Microstructure and Properties of Plasma Sprayed Lead Zirconate Titanate (PZT) Ceramics. Coatings 2012, 2, 64-75
Previous Article in Journal
Microstructure and Properties of Plasma Sprayed Lead Zirconate Titanate (PZT) Ceramics
Coatings 2012, 2(2), 76-93; doi:10.3390/coatings2020076
Article

Spreading Behavior and Morphology of Ethylene Methacrylic Acid (EMAA) Deposits via the Flame Spray Process

* ,
 and
Received: 24 January 2012; in revised form: 6 April 2012 / Accepted: 22 May 2012 / Published: 15 June 2012
View Full-Text   |   Download PDF [3084 KB, uploaded 15 June 2012]   |   Browse Figures
Abstract: A single splat is the building block of a thermal spray coating; thus, investigating single splats is essential to understanding thermal spray coatings and their properties. In this study, the spreading behavior and the morphology of flame sprayed ethylene methacrylic acid (EMAA) splats, deposited at various stand-off distances (SODs) onto glass and mild steel substrates were investigated using optical microscopy, back scattered scanning electron microscopy and secondary electron scanning electron microscopy. The results of this study indicate that the spread factor increases with an increase in the stand-off distance up to 30 cm for glass and 25 cm for steel substrates. Further increase of the stand-off distance results in a decreased spread factor. The aspect ratio of EMAA single splats on both glass and mild steel substrates decreases with increased stand-off distances, indicating that more circular shapes occur at higher stand-off distances. On mild steel substrates, the minimum unevenness ratio (η) occurs at 35 cm SOD. The unevenness ratio (η) on glass substrates decreases from 1.9 (at 20 cm SOD) to 1.77 (at 25 cm SOD), and from 1.8 (at 30 cm SOD) to 1.3 (at 35 cm SOD). The lowest unevenness ratio (η) is found at 35 cm SOD. The highest unevenness ratio (η) is at 25 cm SOD. This paper discusses the effect of surface chemistry on the underside of an EMAA single splat morphology. It includes Raman spectrum analysis of EMAA and the X-ray diffraction of the EMAA powder. This work analyses the splat morphology and classifies the taxonomy of single splats of EMAA.
Keywords: thermal spray; single splat; EMAA; spread factor; aspect ratio thermal spray; single splat; EMAA; spread factor; aspect ratio
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Xie, W.; Wang, J.; Berndt, C.C. Spreading Behavior and Morphology of Ethylene Methacrylic Acid (EMAA) Deposits via the Flame Spray Process. Coatings 2012, 2, 76-93.

AMA Style

Xie W, Wang J, Berndt CC. Spreading Behavior and Morphology of Ethylene Methacrylic Acid (EMAA) Deposits via the Flame Spray Process. Coatings. 2012; 2(2):76-93.

Chicago/Turabian Style

Xie, Wei; Wang, James; Berndt, Christopher C. 2012. "Spreading Behavior and Morphology of Ethylene Methacrylic Acid (EMAA) Deposits via the Flame Spray Process." Coatings 2, no. 2: 76-93.


Coatings EISSN 2079-6412 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert