Microstructure and Corrosion Behavior of Aluminum Coatings Prepared by High-Efficiency Supersonic Plasma Spraying and Oxygen–Acetylene Flame Spraying

2020 ◽  
Vol 29 (3) ◽  
pp. 489-499 ◽  
Author(s):  
Zi-ang Jin ◽  
Ming Liu ◽  
Li-na Zhu ◽  
Hai-dou Wang ◽  
Guo-zheng Ma ◽  
...  
Keyword(s):  
Plasma Spraying ◽  
Corrosion Behavior ◽  
High Efficiency ◽  
Flame Spraying ◽  
Aluminum Coatings ◽  
Supersonic Plasma

Microstructures and Wear Resistance of Al-25 wt.%Si Coatings Prepared by High-Efficiency Supersonic Plasma Spraying

2019 ◽  
Vol 28 (6) ◽  
pp. 1308-1317 ◽  
Author(s):  
Zi-ang Jin ◽  
Li-na Zhu ◽  
Hai-dou Wang ◽  
Ming Liu ◽  
Jia-jie Kang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Plasma Spraying ◽  
High Efficiency ◽  
Supersonic Plasma

Preparation of Aluminum Coatings by Atmospheric Plasma Spraying and Dry-Ice Blasting and Their Corrosion Behavior

2013 ◽  
Vol 22 (7) ◽  
pp. 1222-1229 ◽  
Author(s):  
Shu-Juan Dong ◽  
Bo Song ◽  
Gen-Shu Zhou ◽  
Chang-Jiu Li ◽  
Bernard Hansz ◽  
...  
Keyword(s):  
Plasma Spraying ◽  
Corrosion Behavior ◽  
Atmospheric Plasma Spraying ◽  
Atmospheric Plasma ◽  
Dry Ice ◽  
Aluminum Coatings ◽  
Dry Ice Blasting

Comparison of Dry Sliding Tribological Behavior of Nanostructured Al2O3–13 wt% TiO2 Coatings Prepared by High-Efficiency Supersonic Plasma Spraying and Atmospheric Plasma Spraying

2020 ◽  
Vol 143 (7) ◽  
Author(s):  
Zi-ang Jin ◽  
Jian-long Ma ◽  
Li-na Zhu ◽  
Hai-dou Wang ◽  
Guo-lu Li ◽  
...  
Keyword(s):  
Plasma Spraying ◽  
Friction And Wear ◽  
High Efficiency ◽  
Atmospheric Plasma Spraying ◽  
Atmospheric Plasma ◽  
Wear Volume ◽  
Dry Sliding ◽  
Wear Protection ◽  
Supersonic Plasma ◽  
Tio2 Coatings

Abstract Plasma-sprayed ceramic coatings have been widely used in friction and wear protection of mechanical parts. In this paper, the nanostructured Al2O3–13 wt% TiO2 coatings were prepared by high-efficiency supersonic plasma spraying (HESP) and atmospheric plasma spraying (APS), respectively. The surface and section morphology of the coatings were observed by scanning electron microscopy (SEM). The phase composition of the coatings was analyzed by X-ray diffraction (XRD). The dry sliding friction properties of the coatings were tested on UMT-3 friction and wear testing machine. The results show that after plasma spraying, a large amount of γ-Al2O3 phase appears, while the TiO2 phase almost disappears in the coatings; compared with APS, the coatings sprayed by HESP have fewer defects and better coating quality; under dry friction condition, the steady-state friction coefficient of the coatings sprayed by HESP and APS all decreases with the increase of load, and the wear volume all increases with the increase of load. When the load is more than 40 N, wear volume of the coatings sprayed by APS is basically twice that of HESP; the wear mechanism of the coatings sprayed by HESP is the laminar cracking, peeling off and the adhesive wear.

Microstructural Study of Nanostructured ZrO2 Based Thermal Barrier Coatings Fabricated by High Efficiency Supersonic Plasma Spraying

2011 ◽  
Vol 189-193 ◽  
pp. 80-87 ◽  
Author(s):  
Yu Bai ◽  
Zhi Hai Han ◽  
Hong Qiang Li ◽  
Chao Xu ◽  
Yan Li Xu ◽  
...  
Keyword(s):  
Plasma Spraying ◽  
Bonding Strength ◽  
High Efficiency ◽  
Bimodal Distribution ◽  
Atmospheric Plasma Spraying ◽  
Atmospheric Plasma ◽  
Line System ◽  
Supersonic Plasma ◽  
Ysz Coating ◽  
Sprayed Coating

In this paper, the microstructure of nanostructured zirconia (ZrO2) based coating fabricated by newly developed process, high efficiency supersonic atmospheric plasma spraying (SAPS), is studied. The velocity and surface temperature of in-flight particles during spraying were monitored by on-line system and the microstructure and phase composition of the as-sprayed coating was characterized with SEM, TEM and XRD. Meanwhile, the bonding strength between the top coating and bond coating was measured. The results showed the average in-flight velocity of YSZ particles in SAPS was about 430m/s, which was much higher than that of conventional atmospheric plasma spraying (APS). The as-sprayed coating was composed of well-adhered fine lamellar structures with thickness of 1-4μm. The desirable structure was attributed to higher impact velocity of in-flight particles during SAPS process, resulting in the improvement of flattening degree of molten particles. Meanwhile, the SAPS-YSZ coating exhibited a bimodal distribution with small grains (30-50nm) and large grains (60-110nm), the latter was the main microstructure of the coating. In addition, it was found that the monoclinic zirconia existing in the original powders transformed into tetragonal phase after plasma spraying and the bonding strength of as-sprayed coating was as high as 46±3MPa. The high efficiency supersonic plasma spray, which offers some unique advantages over the conventional plasma spraying process, is expected to be potentially used to deposit a wide variety of nanostructured coatings at lower cost.

Effect of Post-spray Shot Peening Treatment on the Corrosion Behavior of NiCr-Mo Coating by Plasma Spraying of the Shell–Core–Structured Powders

2017 ◽  
Vol 27 (1-2) ◽  
pp. 232-242 ◽  
Author(s):  
Jia-Jia Tian ◽  
Ying-Kang Wei ◽  
Cheng-Xin Li ◽  
Guan-Jun Yang ◽  
Chang-Jiu Li
Keyword(s):  
Plasma Spraying ◽  
Corrosion Behavior ◽  
Shot Peening

Development & Characterization of Alumina Coating by Atmospheric Plasma Spraying

2018 ◽  
Vol 877 ◽  
pp. 104-109 ◽  
Author(s):  
Jobin Sebastian ◽  
Abyson Scaria ◽  
Don George Kurian
Keyword(s):  
Plasma Spraying ◽  
Elevated Temperatures ◽  
Steel Substrate ◽  
Oxide Coating ◽  
Ceramic Coatings ◽  
Substrate Material ◽  
Atmospheric Plasma ◽  
Flame Spraying ◽  
Alumina Coating ◽  
Spray Process

Ceramic coatings are applied on metals to prevent them from oxidation and corrosion at room as well as elevated temperatures. The service environment, mechanisms of protection, chemical and mechanical compatibility, application method, control of coating quality and ability of the coating to be repaired are the factors that need to be considered while selecting the required coating. The coatings based on oxide materials provides high degree of thermal insulation and protection against oxidation at high temperatures for the underlying substrate materials. These coatings are usually applied by the flame or plasma spraying methods. The surface cleanliness needs to be ensured before spraying. Abrasive blasting can be used to provide the required surface roughness for good adhesion between the substrate and the coating. A pre bond coat like Nickel Chromium can be applied on to the substrate material before spraying the oxide coating to avoid chances of poor adhesion between the oxide coating and the metallic substrate. Plasma spraying produces oxide coatings of greater density, higher hardness, and smooth surface finish than that of the flame spraying process Inert gas is often used for generation of plasma gas so as to avoid the oxidation of the substrate material. The work focuses to develop, characterize and optimize the parameters used in Al2O3 coating on transition stainless steel substrate material for minimizing the wear rate and maximizing the leak tightness using plasma spray process. The experiment is designed using Taguchi’s L9 orthogonal array. The parameters that are to be optimized are plasma voltage, spraying distance and the cooling jet pressure. The characterization techniques includes micro-hardness and porosity tests followed by Grey relational analysis of the results

scholarly journals Flame Spraying of Aluminum Coatings Reinforced with Particles of Carbonaceous Materials as an Alternative for Laser Cladding Technologies

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3467 ◽  
Author(s):  
Artur Czupryński
Keyword(s):  
Laser Cladding ◽  
Carbon Materials ◽  
High Strength ◽  
Preliminary Test ◽  
Flame Spraying ◽  
Test Results ◽  
Carbonaceous Materials ◽  
Aluminum Coatings ◽  
Cylinder Liners ◽  
Near Future

The article presents results of the preliminary research of mechanical properties of flame-sprayed aluminum coatings reinforced with carbon materials made on the construction steel S235J0 substrate. For reinforcement the following carbon materials were used: carbon nanotubes Nanocyl NC 7000 (0.5 wt.% and 1 wt.%) and carburite (0.5 wt.%). The properties evaluation was made using metallographic macroscope and microscope, chemical composition, microhardness, abrasion and erosion resistance studies. The obtained results were compared with aluminum powder coatings (EN AW 1000 series). It was proved that the flame spraying of aluminum coatings reinforced with particles of carbonaceous materials can be an effective alternative for laser cladding technology. The preliminary test results will be successively extended by further experiments to contribute in the near future to develop innovative technologies, that can be implemented in the automotive industry for production of components with high strength, wear resistance, good thermal conductivity and low density, such as brake shoes, cylinder liners, piston rings and gears.

Sign in / Sign up

Export Citation Format

Share Document