Study on the effects of atmospheric plasma spray (APS) process parameters on porosities of fly ash deposited coatings

Mohd Moesli Muhammad, Mahdi Che Isa, Azman Jalar @ Jalil, Roslinda Shamsudin, Syed Rosli Sayd Bakar, Mohd Subhi Din Yati, Nik Hassanuddin Nik Yussof, Hasril Naim

Research output: Contribution to journalArticle

Abstract

This paper focuses on the effect of atmospheric plasma spray (APS) process parameters on the porosities of fly ash deposited coatings. The experiments were constructed using the fractional factorial design approach with four variable parameters, which were powder feed rate, plasma power, and primary and carrier gas pressures. The evaluation of porosities was carried out using image analysis and the Archimedes method. Both analyses showed that the highest porosities content was obtained for sample E1, while the lowest porosities content was obtained for sample E2. The microstructure of the lowest porosities content was influenced by a large fraction of melted region, while the highest porosities content was due to numerous embedded unmelted particles within the splats. The results of analysis of variance (ANOVA) indicated that primary gas pressure, powder feed rate, and the interaction between primary and carrier gas pressures are the most significant factors affecting the porosities of deposited coatings. The interaction effect indicates that lowest porosities content of deposited coatings can be obtained by combining low pressure of carrier gas and high pressure of primary gas.

Original languageEnglish
Pages (from-to)73-80
Number of pages8
JournalDefence S and T Technical Bulletin
Volume7
Issue number2
DOIs
Publication statusPublished - 2014

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Fly ash
Porosity
Plasmas
Coatings
Gases
Powders
Analysis of variance (ANOVA)
Image analysis
Microstructure

Keywords

  • Analysis of variance (ANOVA)
  • Atmospheric plasma spray (APS)
  • Fly ash
  • Image analysis
  • Porosities

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Study on the effects of atmospheric plasma spray (APS) process parameters on porosities of fly ash deposited coatings. / Muhammad, Mohd Moesli; Isa, Mahdi Che; Jalar @ Jalil, Azman; Shamsudin, Roslinda; Bakar, Syed Rosli Sayd; Yati, Mohd Subhi Din; Yussof, Nik Hassanuddin Nik; Naim, Hasril.

In: Defence S and T Technical Bulletin, Vol. 7, No. 2, 2014, p. 73-80.

Research output: Contribution to journalArticle

Muhammad, Mohd Moesli ; Isa, Mahdi Che ; Jalar @ Jalil, Azman ; Shamsudin, Roslinda ; Bakar, Syed Rosli Sayd ; Yati, Mohd Subhi Din ; Yussof, Nik Hassanuddin Nik ; Naim, Hasril. / Study on the effects of atmospheric plasma spray (APS) process parameters on porosities of fly ash deposited coatings. In: Defence S and T Technical Bulletin. 2014 ; Vol. 7, No. 2. pp. 73-80.
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AU - Yati, Mohd Subhi Din

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