Process development and coating characteristics of plasma spray-PVD

Mauer, Georg; Hospach, A.; Vaßen, Robert

doi:10.1016/j.surfcoat.2012.08.067

Cited by 112 publications

(39 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…2, also observed by Mauer et al [11]. During PS-PVD process, at beginning 7YSZ powders transformed from solid particles into liquid droplets in high temperature plasma jet.…”

Section: Preparation Of Nano-coatingsupporting

confidence: 56%

Toughness and elasticity behaviors in nano-structured 7 wt.% Y2O3-stabilized ZrO2 coating

Zhang

Zhou

Liu

et al. 2015

Surface and Coatings Technology

View full text Add to dashboard Cite

“…2, also observed by Mauer et al [11]. During PS-PVD process, at beginning 7YSZ powders transformed from solid particles into liquid droplets in high temperature plasma jet.…”

Section: Preparation Of Nano-coatingsupporting

confidence: 56%

Toughness and elasticity behaviors in nano-structured 7 wt.% Y2O3-stabilized ZrO2 coating

Zhang

Zhou

Liu

et al. 2015

Surface and Coatings Technology

View full text Add to dashboard Cite

“…[18]. They show that the intensity distributions are axisymmetric indicating the reliability of using Abel inversion.…”

Section: T Exc (A)mentioning

confidence: 95%

“…Moreover, the addition of H 2 as a secondary plasma gas results in a broadened plasma jet [18] as well as in more compact columnar coating microstructures [15]. The microstructures and preferred growth orientations of columnar structured coatings were shown to be related to the substrate temperature [19].…”

Section: Introductionmentioning

confidence: 99%

Excitation Temperature and Constituent Concentration Profiles of the Plasma Jet Under Plasma Spray-PVD Conditions

Mauer

Vaßen

2017

Plasma Chem Plasma Process

Self Cite

View full text Add to dashboard Cite

Plasma spray-physical vapor deposition (PS-PVD) is a promising technology to produce columnar structured thermal barrier coatings with excellent cyclic lifetime. The characteristics of plasma jets generated by standard plasma gases in the PS-PVD process, argon and helium, have been studied by optical emission spectroscopy. Abel inversion was introduced to reconstruct the spatial characteristics. In the central area of the plasma jet, the ionization of argon was found to be one of the reasons for low emission of atomic argon. Another reason could be the demixing so that helium prevails around the central axis of the plasma jet. The excitation temperature of argon was calculated by the Boltzmann plot method. Its values decreased from the center to the edge of the plasma jet. Applying the same method, a spurious high excitation temperature of helium was obtained, which could be caused by the strong deviation from local thermal equilibrium of helium. The addition of hydrogen into plasma gases leads to a lower excitation temperature, however a higher substrate temperature due to the high thermal conductivity induced by the dissociation of hydrogen. A loading effect is exerted by the feedstock powder on the plasma jet, which was found to reduce the average excitation temperature considerably by more than 700 K in the Ar/He jet.

show abstract

“…[1][2][3][4][5][6][7] As YSZ is still the most important TBC material, strong efforts have been made in the past decade to further decrease its thermal conductivity and improve its phase stability during service at high temperature through doping and co-doping some special metal ions. 8,9 On the other hand, new processes such as plasma spray-physical vapor deposition, 10,11 solution precursor plasma spray, 12,13 and suspension plasma spray (SPS) have been developed to produce YSZ TBCs with the columnar or highly segmented microstructure, which can result in improved strain tolerance and durability at a reduced cost as compared to the EB-PVD process. [14][15][16][17] During the past decade, SPS as an emerging process has been intensively investigated for multifunctional coatings preparations.…”

Section: Introductionmentioning

confidence: 99%

Effects of Processing Parameters on the Deposition of Yttria Partially Stabilized Zirconia Coating During Suspension Plasma Spray

et al. 2016

View full text Add to dashboard Cite

The process–microstructure relationship in suspension plasma spray (SPS) of yttria partially stabilized zirconia (YSZ) has been studied experimentally. An ethanol‐based suspension with a powder loading of 25 wt% was plasma sprayed with radial injection under four different plasma conditions, to examine the effects of plasma gas composition (Ar/He ratio), secondary gas (Ar/He and Ar/H2), and the nozzle diameter of the plasma gun. The suspension feeding rate was optimized firstly and coatings were prepared for microstructural observation. Capturing of in‐flight particles into water as well as collection of splats formed on heated flat metal substrates were utilized in order to better understand the more complicated intermediate process steps in SPS. It was found that a plasma jet with higher momentum allowed a higher suspension flow rate and both columnar and deep vertically cracked structure could be created depending on the plasma parameters as well as the substrate surface roughness.

show abstract

Process development and coating characteristics of plasma spray-PVD

Cited by 112 publications

References 8 publications

Toughness and elasticity behaviors in nano-structured 7 wt.% Y2O3-stabilized ZrO2 coating

Toughness and elasticity behaviors in nano-structured 7 wt.% Y2O3-stabilized ZrO2 coating

Excitation Temperature and Constituent Concentration Profiles of the Plasma Jet Under Plasma Spray-PVD Conditions

Effects of Processing Parameters on the Deposition of Yttria Partially Stabilized Zirconia Coating During Suspension Plasma Spray

Contact Info

Product

Resources

About