Characterization of Plasma-Sprayed Ceramic Coating Layers for Melting Crucible of Metal Fuels

2017 ◽  
Vol 17 (11) ◽  
pp. 8598-8602
Author(s):  
Ki-Hwan Kim ◽  
Song Hoon ◽  
Jong-Hwan Kim ◽  
Ki-Won Hong ◽  
Jeong-Yong Park
Keyword(s):  
Ceramic Coating ◽  
Melting Crucible ◽  
Coating Layers ◽  
Plasma Sprayed

scholarly journals Microstructure and Wear Behaviors of Plasma-Sprayed MoAlB Ceramic Coating

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 474
Author(s):  
Fuzhu Li ◽  
Shengnan Sun ◽  
Yong Xu ◽  
Lihui Tian ◽  
Yun Wang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Plasma Spraying ◽  
Ceramic Coating ◽  
Adhesive Wear ◽  
Ceramic Coatings ◽  
Atmospheric Plasma ◽  
Wear Rates ◽  
Arc Power ◽  
Plasma Sprayed

MoAlB ceramic coatings were prepared on a 316 steel surface by atmospheric plasma spraying with different arc power levels. The phase composition, microstructure and wear resistance of coatings against GCr15 and Si3N4 counterparts were studied. The MoAlB ceramic decomposed and was oxidized to form MoB and Al2O3 during plasma spraying. With the increase of the arc power, MoAlB experienced more decomposition, but the coatings became denser. When the arc power increased from 30 to 36 kW, the wear rates of coatings against GCr15 and Si3N4 balls reduced by 91% and 78%, respectively. The characterization of wear tracks shows that when against GCr15 counterparts, the main wear mechanisms are abrasive and adhesive wear, and when against Si3N4 counterparts, fatigue and abrasive wear are dominant. The refinement of wear resistance by increasing arc power can be attributed to the improvement of density and adhesive strength among splats.

scholarly journals Characterization of deposited plasma spray NiCrAlCoY2O3 coating layers on AlMg1 alloy substrates

2021 ◽  
Vol 62 (1) ◽  
pp. 34-40
Author(s):  
Mihailo Mrdak ◽  
Časlav Lačnjevac ◽  
Marko Rakin ◽  
Đorđe Janaćković ◽  
Darko Veljić ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Plasma Spray ◽  
Ceramic Coating ◽  
Jet Fuel ◽  
Plasma Gun ◽  
Microstructure And Mechanical Properties ◽  
High Adhesion ◽  
Powder Particles ◽  
Coating Layers

In this paper, analyzed are the effects of the plasma spray distance on the microstructure and mechanical properties of the NiCrAlCoY2O3 coating layers deposited at atmospheric pressure. The microstructure and mechanical properties of the coating layers are under the influence of the interaction of plasma particles (ions and electrons) with powder particles, providing the transfer of velocity and temperature of the plasma particles onto the powder particles. The effect of the interaction is directly dependent on the time the powder particles were present in the plasma which is defined by distance of the plasma gun from the substrate, depending on the granulation of the powder, the melting point and specific gravity. In order to obtain homogeneous and denser coating layers with high adhesion, in the experiment three distances from the substrate were used: 95 mm, 105 mm and 115 mm. The layers were deposited on thin sheets of AlMg1 aluminum thickness of 0.6 mm. Evaluation of mechanical properties of the layers was carried out by examining microhardness using the HV0.1 method and the bond strength by tensile testing. The morphology of the powder particles was examined on the SEM, while the microstructure of the layers was evaluated under a light microscope in accordance with the Pratt Whitney standard. The results of the experiment showed that the distance from the substrate substantially influenced the structure and mechanical properties of the coating layers. The best deposited layers were examined in the system with the ZrO224%MgO ceramic coating, which have proved to be reliable protectionfrom high temperature and abrasive rocket jet fuel.

CHARACTERIZATION OF AS-SPRAYED AND LASER-TREATED ZIRCONIA-BASED PLASMA SPRAYED COATINGS

1990 ◽  
Vol 51 (C5) ◽  
pp. C5-393-C5-402
Author(s):  
A. FERRIERE ◽  
G. FLAMANT ◽  
J.-F. ROBERT ◽  
P. PEKSHEV ◽  
I. SMUROV ◽  
...  
Keyword(s):  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

scholarly journals Microstructure and Wear Behavior of Plasma-Sprayed TiO2–SiAlON Ceramic Coating

Coatings ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1268
Author(s):  
Yun Wang ◽  
Weichao Wan ◽  
Junhong Mao ◽  
Lihui Tian ◽  
Ruitao Li
Keyword(s):  
Ceramic Coating ◽  
Wear Behavior ◽  
Rutile Phase ◽  
Atmospheric Plasma ◽  
Tio2 Anatase ◽  
Sialon Ceramic ◽  
Mating Surface ◽  
Starved Lubrication ◽  
Plasma Sprayed ◽  
Lubrication Conditions

In this study, atmospheric plasma spray was employed to deposit TiO2–SiAlON ceramic coating on 316 stainless steel. The phases and microstructure of the ceramic coating were investigated. Additionally, comparative studies on the tribological performances of the substrate and the ceramic coating, under both dry and starved lubrication conditions, were carried out. The SiAlON phase was preserved, while partial TiO2 anatase was transformed to rutile phase. The wear rate of the coating was roughly 1/3 of that of the substrate under both conditions. The wear mechanisms of the ceramic coating were surface fracture and abrasive wear in both cases, and the coating under starved lubrication underwent less abrasion. The pores in the coating served as micro-reservoirs, forming an oil layer on the mating surface, and improving tribological properties during sliding.

Characterization of Mineral Deposits on Plasma-Sprayed HA-Coated Ti-6Al-4V

1995 ◽  
Vol 414 ◽  
Author(s):  
V. Benezra ◽  
M. Spector ◽  
L. W. Hobbs
Keyword(s):  
Hip Prosthesis ◽  
Femoral Stem ◽  
Mineral Deposits ◽  
Total Hip Prosthesis ◽  
X Ray ◽  
Ha Coating ◽  
Transmission Electron ◽  
Plasma Sprayed ◽  
Surrounding Bone

AbstractPlasma-sprayed hydroxyapatite (PSHA) coatings are often used as the attachment vehicle for the femoral component of a total hip prosthesis. The key to successful hip replacement is the attachment of the femoral stem to the surrounding bone.Within hours of implantation of PSHA-coated Ti-6AI-4V rods in canine bone, bone mineral deposits on the HA coating. These deposits take the form of globular networks of fibrous crystallites. The crystallinity of these deposits was confirmed via high-resolution transmission electron microscopy (TEM) and electron diffraction. We have also characterized the composition of these deposits using x-ray energy-dispersive spectroscopy (XEDS) in the scanning TEM. Finally, we have studied the morphology of the fiber-like crystallites by stereography in the TEM.

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