scholarly journals Exploiting Suspension Plasma Spraying to Deposit Wear-Resistant Carbide Coatings

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2344 ◽  
Author(s):  
Satyapal Mahade ◽  
Karthik Narayan ◽  
Sivakumar Govindarajan ◽  
Stefan Björklund ◽  
Nicholas Curry ◽  
...  
Keyword(s):  
Plasma Spraying ◽  
High Performance ◽  
Suspension Plasma Spraying ◽  
Coating Materials ◽  
Wear Resistant ◽  
Thermal Spray Process ◽  
Wear Resistant Coatings ◽  
Spray Process ◽  
Carbide Coatings

Titanium- and chromium-based carbides are attractive coating materials to impart wear resistance. Suspension plasma spraying (SPS) is a relatively new thermal spray process which has shown a facile ability to use sub-micron and nano-sized feedstock to deposit high-performance coatings. The specific novelty of this work lies in the processing of fine-sized titanium and chromium carbides (TiC and Cr3C2) in the form of aqueous suspensions to fabricate wear-resistant coatings by SPS. The resulting coatings were characterized by surface morphology, microstructure, phase constitution, and micro-hardness. The abrasive, erosive, and sliding wear performance of the SPS-processed TiC and Cr3C2 coatings was also evaluated. The results amply demonstrate that SPS is a promising route to manufacture superior wear-resistant carbide-based coatings with minimal in situ oxidation during their processing.

scholarly journals Development of Photocatalytic Active TiO2Surfaces by Thermal Spraying of Nanopowders

2008 ◽  
Vol 2008 ◽  
pp. 1-8 ◽  
Author(s):  
Filofteia-Laura Toma ◽  
Ghislaine Bertrand ◽  
Didier Klein ◽  
Cathy Meunier ◽  
Sylvie Begin
Keyword(s):  
Plasma Spraying ◽  
High Performance ◽  
Photocatalytic Performance ◽  
Thermal Spraying ◽  
Environmental Water ◽  
Suspension Plasma Spraying ◽  
Atmospheric Plasma ◽  
Spray Process ◽  
Coating Characteristics ◽  
Titania Coatings

Titanium dioxide is a very useful photocatalyst for the decomposition and diminution of environmental water and air pollutants. In such applications, it can be used as slurry or as immobilized coating obtained by different deposition methods. The studies performed in the last years showed that thermal spraying could be employed to elaborate TiO2coatings with high performance for the decomposition of organic compounds. This manuscript presents a comparative study on the microstructure and photocatalytic performance of titania coatings obtained by different thermal spray techniques: atmospheric plasma spraying (APS), suspension plasma spraying (SPS) and high-velocity oxygen fuel spray process (HVOF). Different titania powders and suspensions were used to study the influence of the feedstock materials on the coating characteristics. The deposits were mainly characterised by SEM and X-ray diffraction. The photocatalytic performance was evaluated from the removal of nitrogen oxides. The experimental results showed that a drastic reduction of the pollutant concentration was obtained in presence of coatings elaborated by suspension plasma spraying. TiO2coatings resulting from the spraying of agglomerated powder presentd less efficiency. That was mainly explained by the significant phase transformation from anatase to rutile that occurred in the enthalpic source during the spray processes.

Coatings characterization of Ni-based alloy applied by HVOF

2018 ◽  
Vol 90 (2) ◽  
pp. 336-343 ◽  
Author(s):  
José Cabral Miramontes ◽  
Gabriela Karina Pedraza Basulto ◽  
Citlalli Gaona Tiburcio ◽  
Patricia Del Carmen Zambrano Robledo ◽  
Carlos Agustín Poblano Salas ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bond Strength ◽  
High Performance ◽  
Thermal Spraying ◽  
Advanced Materials ◽  
Oxide Content ◽  
Coating Materials ◽  
Content Type ◽  
Thermal Spray Process ◽  
Spray Process

Purpose The thermal spraying technique of High-Velocity Oxygen Fuel (HVOF) coating was used to deposit coatings of an alloy composed of Ni-based substrates on stainless steel AISI 304. The aim of this study was to determine the mechanical properties such as hardness and bond strength that these coatings have when the spray distance is varied, as well as the microstructure and phases formed during the thermal spray process. Design/methodology/approach The coatings were applied by HVOF and characterized by scanning electron microscopy, image analysis, X-ray diffraction, microhardness and bond strength to analyze the mechanical properties. Findings The microstructure of the coatings showed low porosity, oxide content and interface contamination in the substrate–coating interface, without the presence of unmolten particles. The microhardness values reached 600 HV for the three spray distances used and the bond strength values reached over 55 MPa. Practical implications The use of coatings on aircraft components is growing dramatically owing to the high costs of advanced materials and the growing lifecycle requirements for high-performance systems, which are taken into account because of the variety of coatings and complexity of environmental factors. Originality/value The originality of this study lies in the development of new coating materials for the manufacture and protection of various turbine components. The value is based on the development of materials and processes to be used to manufacture them.

Composite Fe/TiC Powders for Wear Resistance Coatings Using Plasma Spray Process

1997 ◽  
Author(s):  
P. Vitiaz ◽  
T. Azarova ◽  
T. Talako ◽  
A. Ilyuschenko ◽  
S. Steinhauser ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Plasma Spraying ◽  
Plasma Spray ◽  
Coating Properties ◽  
Iron Matrix ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Spray Process ◽  
Plasma Spray Process ◽  
Wear Resistance Coatings

Abstract This work evaluates the potential of using new competitive powders of Fe/TiC system for plasma spraying of wear resistant coatings. To improve coating properties, Cr and Ni were added to the iron matrix. The results of complex investigations of plasma coatings from such materials are presented.

Reactive Plasma Spraying of Wear Resistant Coatings of Ti Composites

1996 ◽  
Author(s):  
E. Lugscheider ◽  
P. Remer ◽  
L. Zhao
Keyword(s):  
Plasma Spraying ◽  
Raw Materials ◽  
Powder Size ◽  
Titanium Coating ◽  
Vacuum Plasma Spraying ◽  
Wear Resistant ◽  
Plasma Gun ◽  
Wear Resistant Coatings ◽  
Reactive Plasma Spraying ◽  
Reactive Plasma

Abstract In this investigation reactive plasma spraying was used to produce wear resistant coatings of Ti-carbides/titanium or Ti-nitrides/titanium composites. Ti-powders with different powder size distributions were used as raw materials. Methane and nitrogen were used as reactive gases to form carbides and nitrides. A reactor was adapted to the plasma gun F4 of a Sulzer Metco vacuum plasma spraying equipment to increase the degree of the expected reactions. Phase analysis and micrography of the coatings reveal that the Ti-hardphases were synthesized during spraying and embedded in the titanium matrix. The in situ synthesized hardphases show different forms and sizes. Most of them are non-stoichiometry. Compared to the titanium coating the coatings produced by reactive plasma spraying are much harder and more resistant against both sliding and abrasive wear.

Influence of HVOF Thermal Spray Process on the Microstructures and Properties of Fe-Based Amorphous / Nano Metallic Coatings

2009 ◽  
Vol 633-634 ◽  
pp. 685-694 ◽  
Author(s):  
X.Q. Liu ◽  
Y.G. Zheng ◽  
X.C. Chang ◽  
W.L. Hou ◽  
Jian Qiu Wang
Keyword(s):  
High Performance ◽  
Good Alternative ◽  
Metallic Coating ◽  
Thermal Spray Process ◽  
Spray Process ◽  
Hvof Thermal Spray ◽  
Alternative Material ◽  
High Microhardness ◽  
Coating Microstructure ◽  
Hvof Thermal Spray Process

A new Fe-based amorphous / nano metallic coating with a good combination of high microhardness and excellent erosion corrosion resistance was produced by high velocity oxygen fuel (HVOF). The coating microstructure, amorphous phase content and properties under different HVOF processes were evaluated. It was found that they are very sensitive to the powder feed rate, stand-off distance and oxygen flow. This high performance amorphous / nano metallic coating could be applied as a good alternative material in erosion and corrosion environments.

Investigation and Characterization of Cr3C2-Based Wear-Resistant Coatings Applied by the Cold Spray Process

2006 ◽  
Vol 15 (3) ◽  
pp. 400-412 ◽  
Author(s):  
Douglas E. Wolfe ◽  
Timothy J. Eden ◽  
John K. Potter ◽  
Adam P. Jaroh
Keyword(s):  
Cold Spray ◽  
Cold Spray Process ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Spray Process

In Situ Acoustic Monitoring of Thermal Spray Process Using High-Frequency Impulse Measurements

2017 ◽  
Vol 27 (1-2) ◽  
pp. 50-58 ◽  
Author(s):  
Wolfgang Tillmann ◽  
Frank Walther ◽  
Weifeng Luo ◽  
Matthias Haack ◽  
Jens Nellesen ◽  
...  
Keyword(s):  
Thermal Spray ◽  
High Frequency ◽  
Acoustic Monitoring ◽  
Thermal Spray Process ◽  
Spray Process ◽  
Frequency Impulse
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