INVESTIGATION OF OXIDATION MECHANISM OF HVOF-CONICRALY COATING IN EARLY STAGES OF APPLICATION

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

SALEHI DOOLABI DAVOUD; RAHIMIPOUR MOHAMMAD REZA; ALIZADEH MEHDI; HADAVI SEYED MOHAMMAD MEHDI; VAEZI MOHAMMAD REZA

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: JOURNAL OF ADVANCED MATERIALS AND TECHNOLOGIES Year:2017 | Volume:5 | Issue:4 Page(s): 53-63

Download Full-Text

Persian Verion

View:

703

Download:

Cites:

Information Journal Paper

Title

INVESTIGATION OF OXIDATION MECHANISM OF HVOF-CONICRALY COATING IN EARLY STAGES OF APPLICATION

Author(s)

Keywords

SURFACE SPLATSQ2

CONICRALYQ2

EARLY STAGES OF OXIDATIONQ2

HVOFQ2

SPINEL OXIDESQ2

Abstract

MCrAlY coatings possess important role on the performance of turbine engines. Their main application is resistance to high temperature oxidation. Although the oxidation mechanism of these coatings were studied by other researchers, there is lack of published papers on the early stage of this phenomenon. In this project, the effect of SURFACE SPLATS produced during HVOF process on early stage oxidation mechanism of the CONICRALY coating was studied in terms of both oxidation time and adhesion characteristics of splats to the coating surface. The experimental results showed that in the first oxidation moments, the oxide layer which forms on the splats is composed of significant amount of heavy metals (Ni, Co and Cr). By gradual aluminum diffusion to the coating surface, a rich aluminum oxide is replaced by the heavy element oxides. Diffusion of Al to the surface of coating over time in addition to increasing the thickness of oxide layer could also cause depletion of b phase from splats surface. These two resulted in the formation of crack in the coating and local oxide growth (spinel oxide in nodular shape), respectively. Consequently, the oxidation rate of areas covered by splats was much higher than the coating surface areas without splats due to high ratio of surface area to volume of splats and limited aluminum reservoir in the splats (specially for splats with poor bonding to the surface).

Cites

No record.

References

No record.

Cite

APA: Copy

SALEHI DOOLABI, DAVOUD, RAHIMIPOUR, MOHAMMAD REZA, ALIZADEH, MEHDI, HADAVI, SEYED MOHAMMAD MEHDI, & VAEZI, MOHAMMAD REZA. (2017). INVESTIGATION OF OXIDATION MECHANISM OF HVOF-CONICRALY COATING IN EARLY STAGES OF APPLICATION. JOURNAL OF ADVANCED MATERIALS AND TECHNOLOGIES, 5(4 ), 53-63. SID. https://sid.ir/paper/252367/en

Vancouver: Copy

SALEHI DOOLABI DAVOUD, RAHIMIPOUR MOHAMMAD REZA, ALIZADEH MEHDI, HADAVI SEYED MOHAMMAD MEHDI, VAEZI MOHAMMAD REZA. INVESTIGATION OF OXIDATION MECHANISM OF HVOF-CONICRALY COATING IN EARLY STAGES OF APPLICATION. JOURNAL OF ADVANCED MATERIALS AND TECHNOLOGIES[Internet]. 2017;5(4 ):53-63. Available from: https://sid.ir/paper/252367/en

IEEE: Copy

DAVOUD SALEHI DOOLABI, MOHAMMAD REZA RAHIMIPOUR, MEHDI ALIZADEH, SEYED MOHAMMAD MEHDI HADAVI, and MOHAMMAD REZA VAEZI, “INVESTIGATION OF OXIDATION MECHANISM OF HVOF-CONICRALY COATING IN EARLY STAGES OF APPLICATION,” JOURNAL OF ADVANCED MATERIALS AND TECHNOLOGIES, vol. 5, no. 4 , pp. 53–63, 2017, [Online]. Available: https://sid.ir/paper/252367/en

Related Journal Papers