Paper Title:
Effect of Substrate Temperature on Microstructural Characteristics of Thermal Sprayed Superalloys
  Abstract

Recently, there has been a huge interest in application of thermal spraying processes to apply a protective layer on the surface of engineering components. Thermal spraying as a near net shape forming technique has also found applications in manufacturing of advanced engineering components. Spraying methods such as High Velocity Oxygen Fuel (HVOF), Vacuum Plasma Spraying (VPS), and Air Plasma Spraying (APS) are among the most commonly used deposition techniques. Coatings are built up from impact of molten particles on the substrate surface and their flattening and solidification (splat formation). Deposition of millions of individual splats connected to each other at different layers will result in a lamellae type structure. This is a typical example of an anisotropic microstructure. The microstructural features such as porosity, oxide layers define the physical and mechanical properties of coating material. This study investigates the influence of substrate temperature on microstructural characteristics of APS deposited superalloy 625 on steel substrate. The coatings were deposited on substrates at different temperatures. The porosity level was measured using prosimetry. Both image analysis technique and Electron Probe Microanalysis (EPMA) was used to measure the amount of oxide phase. The results indicated that lower substrate temperature results in lower oxide in microstructure. There has been no significant change in porosity level due to substrate temperature.

  Info
Periodical
Edited by
E. Hristoforou and D.S. Vlachos
Pages
13-17
DOI
10.4028/www.scientific.net/KEM.495.13
Citation
F. Azarmi, G. Karami, "Effect of Substrate Temperature on Microstructural Characteristics of Thermal Sprayed Superalloys", Key Engineering Materials, Vol. 495, pp. 13-17, 2012
Online since
November 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Ya Ran Niu, Xuan Yong Liu, Chuan Xian Ding
Abstract:In this work, silicon coatings were deposited using VPS and APS technologies. Their structure and composition were characterized using XPS,...
802
Authors: B.D. White, Olivera Kesler
Abstract:Porous composite cathodes containing (La0.8Sr0.2)0.98MnO3 (LSM) and yttria stabilized zirconia (YSZ) for use in solid oxide fuel cells...
299
Authors: F. Azarmi, A. Moradian, J. Mostaghimi, Tom W. Coyle, L. Pershin
Abstract:There is a growing interest in use of the nickel-based alloy Inconel 625 coatings due to its ability to improve base materials high...
1218
Authors: Peng Cao, Brian Gabbitas, Asma Salman, De Liang Zhang, Z.H. Han
Abstract:Thermal spray deposition has been widely used as a coating process for applying thin protective layers to the need-to-protect materials, or...
159
Authors: Marek Góral, Maciej Pytel, Pawel Sosnowy, Slawomir Kotowski, Marcin Drajewicz
Abstract:In the paper first results of TBCs deposition by LPPS-Thin Film method were presented. The LPPS-Thin Film is a new type of processes for...
1