Splat formation of plasma sprayed functionally graded YSZ/NiCrCoAlY thermal barrier coatings

Zhuang Ma; Fang Ji Zhou; Su Hong Cao; Fu Chi Wang; Qun Bo Fan

doi:10.4028/0-87849-473-1.1862

Splat formation of plasma sprayed functionally graded YSZ/NiCrCoAlY thermal barrier coatings

Zhuang Ma^*, Fang Ji Zhou, Su Hong Cao, Fu Chi Wang, Qun Bo Fan

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Splat morphologies of YSZ/NiCrCoAlY TBCs by plasma spray were characterized using SEM. Based on some assumptions, plasma jet temperature field was established by numerical simulation and the effects of spray parameters are individually studied to optimize the spray process parameters. Furthermore, the interaction wetting ability was taken into account in order to investigate the interaction effect between ZrO₂ and NiCrCoAlY droplets. It shows that T enhances markedly with increasing in I and decreasing in F_Ar; while in despite of the insignificant effect of F_He on T, the temperature of powder in plasma jet enhances with increasing in F_He. As a result of higher thermal conductivity of powder in He plasma gas. NiCrCoAlY droplet impacting solidified NiCrCoAlY splat wets well and spreads fluently while that impacts solidified YSZ splat spreads restrictedly for the poor wetting on the YSZ splat surface.

Original language	English
Pages (from-to)	1862-1865
Number of pages	4
Journal	Key Engineering Materials
Volume	368-372 PART 2
DOIs	https://doi.org/10.4028/0-87849-473-1.1862
Publication status	Published - 2008

Keywords

Process parameters
Splat formation
Thermal barrier coatings

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10.4028/0-87849-473-1.1862

Cite this

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title = "Splat formation of plasma sprayed functionally graded YSZ/NiCrCoAlY thermal barrier coatings",

abstract = "Splat morphologies of YSZ/NiCrCoAlY TBCs by plasma spray were characterized using SEM. Based on some assumptions, plasma jet temperature field was established by numerical simulation and the effects of spray parameters are individually studied to optimize the spray process parameters. Furthermore, the interaction wetting ability was taken into account in order to investigate the interaction effect between ZrO2 and NiCrCoAlY droplets. It shows that T enhances markedly with increasing in I and decreasing in FAr; while in despite of the insignificant effect of FHe on T, the temperature of powder in plasma jet enhances with increasing in FHe. As a result of higher thermal conductivity of powder in He plasma gas. NiCrCoAlY droplet impacting solidified NiCrCoAlY splat wets well and spreads fluently while that impacts solidified YSZ splat spreads restrictedly for the poor wetting on the YSZ splat surface.",

keywords = "Process parameters, Splat formation, Thermal barrier coatings",

author = "Zhuang Ma and Zhou, {Fang Ji} and Cao, {Su Hong} and Wang, {Fu Chi} and Fan, {Qun Bo}",

year = "2008",

doi = "10.4028/0-87849-473-1.1862",

language = "English",

volume = "368-372 PART 2",

pages = "1862--1865",

journal = "Key Engineering Materials",

issn = "1013-9826",

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TY - JOUR

T1 - Splat formation of plasma sprayed functionally graded YSZ/NiCrCoAlY thermal barrier coatings

AU - Ma, Zhuang

AU - Zhou, Fang Ji

AU - Cao, Su Hong

AU - Wang, Fu Chi

AU - Fan, Qun Bo

PY - 2008

Y1 - 2008

N2 - Splat morphologies of YSZ/NiCrCoAlY TBCs by plasma spray were characterized using SEM. Based on some assumptions, plasma jet temperature field was established by numerical simulation and the effects of spray parameters are individually studied to optimize the spray process parameters. Furthermore, the interaction wetting ability was taken into account in order to investigate the interaction effect between ZrO2 and NiCrCoAlY droplets. It shows that T enhances markedly with increasing in I and decreasing in FAr; while in despite of the insignificant effect of FHe on T, the temperature of powder in plasma jet enhances with increasing in FHe. As a result of higher thermal conductivity of powder in He plasma gas. NiCrCoAlY droplet impacting solidified NiCrCoAlY splat wets well and spreads fluently while that impacts solidified YSZ splat spreads restrictedly for the poor wetting on the YSZ splat surface.

AB - Splat morphologies of YSZ/NiCrCoAlY TBCs by plasma spray were characterized using SEM. Based on some assumptions, plasma jet temperature field was established by numerical simulation and the effects of spray parameters are individually studied to optimize the spray process parameters. Furthermore, the interaction wetting ability was taken into account in order to investigate the interaction effect between ZrO2 and NiCrCoAlY droplets. It shows that T enhances markedly with increasing in I and decreasing in FAr; while in despite of the insignificant effect of FHe on T, the temperature of powder in plasma jet enhances with increasing in FHe. As a result of higher thermal conductivity of powder in He plasma gas. NiCrCoAlY droplet impacting solidified NiCrCoAlY splat wets well and spreads fluently while that impacts solidified YSZ splat spreads restrictedly for the poor wetting on the YSZ splat surface.

KW - Process parameters

KW - Splat formation

KW - Thermal barrier coatings

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U2 - 10.4028/0-87849-473-1.1862

DO - 10.4028/0-87849-473-1.1862

M3 - Article

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SN - 1013-9826

VL - 368-372 PART 2

SP - 1862

EP - 1865

JO - Key Engineering Materials

JF - Key Engineering Materials

ER -

Splat formation of plasma sprayed functionally graded YSZ/NiCrCoAlY thermal barrier coatings

Abstract

Keywords

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