scholarly journals Synthesis of Cubic Aluminum Nitride (AlN) Coatings through Suspension Plasma Spray (SPS) Technology

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 500
Author(s):  
Faranak Barandehfard ◽  
James Aluha ◽  
François Gitzhofer
Keyword(s):  
Carbon Steel ◽  
Aluminum Nitride ◽  
Plasma Spray ◽  
Steel Substrate ◽  
Pure Aluminum ◽  
Titanium Substrate ◽  
Thermal Spraying ◽  
Suspension Plasma Spray ◽  
Liquid Carrier ◽  
Cubic Aluminum Nitride

Thermal spraying of aluminum nitride (AlN) is a challenging issue because it decomposes at a high temperature. In this work, the use of suspension plasma spray (SPS) technology is proposed for the in situ synthesis and deposition of cubic-structured AlN coatings on metallic substrates. The effects of the nitriding agent, the suspension liquid carrier, the substrate materials and the standoff distance during deposition by SPS were investigated. The plasma-synthesized coatings were analyzed by X-ray diffraction (XRD), optical microscopy (OM) and scanning electron microscopy (SEM). The results show higher AlN content in the coatings deposited on a carbon steel substrate (~82%) when compared to titanium substrate (~30%) or molybdenum (~15%). Melamine mixed with pure aluminum powder produced AlN-richer coatings of up to 82% when compared to urea mixed with the Al (~25% AlN). Hexadecane was a relatively better liquid carrier than the oxygen-rich liquid carriers such as ethanol or ethylene glycol. When the materials were exposed to a molten aluminum–magnesium alloy at 850 °C for 2 h, the corrosion resistance of the AlN-coated carbon steel substrate showed improved performance in comparison to the uncoated substrate.

Wear Resistance of Plasma-Sprayed Al2O3-TiO2 Nanocoatings

2007 ◽  
Vol 345-346 ◽  
pp. 641-644 ◽  
Author(s):  
Jee Hoon Ahn ◽  
Eun Pil Song ◽  
Sung Hak Lee ◽  
Nack J. Kim
Keyword(s):  
Wear Resistance ◽  
Carbon Steel ◽  
Plasma Spray ◽  
Wear Mechanism ◽  
Steel Substrate ◽  
Low Carbon Steel ◽  
Spray Parameters ◽  
Low Carbon ◽  
Tio2 Coatings ◽  
Plasma Sprayed

Wear resistance of Al2O3-8wt.%TiO2 coatings plasma-sprayed using nanopowders was investigated. Four types of nanostructured Al2O3-8wt.%TiO2 powders were plasma-sprayed on a low-carbon steel substrate by using different critical plasma spray parameters (CPSP). The coatings consisted of completely melted and partially melted regions. The hardness of the coatings increased with increasing CPSP, while the wear resistance was the highest for the coating sprayed with the lowest CPSP. The main wear mechanism was a delamination mode in the coating sprayed with the high CPSP, but was changed to an abrasive mode in the coating sprayed with the low CPSP. According to this change in the wear mechanism, the wear resistance was the best in the coating sprayed with lowest CPSP, while its hardness was lowest.

Lining of Carbon Steel with Metal Foils by Shot Peening

2007 ◽  
Vol 561-565 ◽  
pp. 853-856 ◽  
Author(s):  
Yasunori Harada ◽  
Kenzo Fukaura ◽  
Dae Gi Kim
Keyword(s):  
Carbon Steel ◽  
Shot Peening ◽  
Heating Temperature ◽  
Steel Substrate ◽  
Pure Aluminum ◽  
Pure Copper ◽  
Surface Characteristics ◽  
Surface Alloying ◽  
Metal Foils ◽  
Commercially Pure

A lining process for carbon steel using shot peening was investigated. In the shot peening experiment, the dissimilar foil set on the carbon steel substrate is pelted with many shots at a high velocity. The foil is bonded to the surface of the substrate due to plastic deformation induced by the collision of the shots. In the experiment, an air-type shot peening machine with an electrical heater was employed. The substrates are commercially carbon steel S45C, and the foils are commercially pure aluminum, pure copper, and pure nickel. The effects of shot conditions and the heating temperature on the joinability were examined. To improve surface characteristics such as wear resistance and corrosion resistance, the surface alloying of the lined workpiece was also attempted. The metal foils were successfully joined to the surface of the substrate. It was found that surface properties of carbon steel could be improved by the shot lining process.

Effect of Ce on Wear Behavior of Plasma Spray Welded Novel Aluminum Bronze Coatings

2011 ◽  
Vol 418-420 ◽  
pp. 831-834
Author(s):  
Wen Sheng Li ◽  
Yi Liu
Keyword(s):  
Wear Resistance ◽  
Rare Earth ◽  
Carbon Steel ◽  
Plasma Spray ◽  
Wear Behavior ◽  
Steel Substrate ◽  
Aluminum Bronze ◽  
Properties Of Coatings ◽  
Substrate Effects ◽  
Coating Microstructure

Aluminum bronze powders with free and 0.1wt%Ce were plasma spray welded on 45# carbon steel substrate, Effects of rare earth Ce on the microstructure and wear resistance of plasma spray welded novel aluminum bronze coatings were investigated. Tribological properties of coatings were tested on reciprocating sliding tester. Results showed that a small amount of Ce (0.1wt %) in novel aluminum bronze coating can refine the coating microstructure and the coating with 0.1wt%Ce process higher wear resistance compared to the Ce-free coating. Both of the coatings have different wear mechanisms.

scholarly journals Fabrication of Aluminum Nitride Coating onto Carbon Steel Substrate by Reactive Plasma Spraying

Shinku ◽  
2005 ◽  
Vol 48 (3) ◽  
pp. 223-225 ◽  
Author(s):  
Hajime NAKAMURA ◽  
Motohiro YAMADA ◽  
Masahiro FUKUMOTO ◽  
Toshiaki YASUI ◽  
Koyata TAKAHASHI
Keyword(s):  
Carbon Steel ◽  
Aluminum Nitride ◽  
Plasma Spraying ◽  
Steel Substrate ◽  
Nitride Coating ◽  
Reactive Plasma Spraying ◽  
Reactive Plasma

The study of the electrochemical properties of zinc-rich coating on the base of water sodium silicate

2019 ◽  
Vol 24 (4) ◽  
pp. 51-58
Author(s):  
Le Hong Quan ◽  
Nguyen Van Chi ◽  
Mai Van Minh ◽  
Nong Quoc Quang ◽  
Dong Van Kien
Keyword(s):  
Carbon Steel ◽  
Electrochemical Properties ◽  
Sodium Silicate ◽  
Cathodic Protection ◽  
Electrochemical Impedance ◽  
Steel Substrate ◽  
Electrical Contact ◽  
Electrochemical Impedance Spectra ◽  
Pure Zinc ◽  
Electric Circuits

The study examines the electrochemical properties of a coating based on water sodium silicate and pure zinc dust (ZSC, working title - TTL-VN) using the Electrochemical Impedance Spectra (EIS) with AutoLAB PGSTAT204N. The system consists of three electrodes: Ag/AgCl (SCE) reference electrode in 3 M solution of KCl, auxiliary electrode Pt (8x8 mm) and working electrodes (carbon steel with surface treatment up to Sa 2.5) for determination of corrosion potential (Ecorr) and calculation of equivalent electric circuits used for explanation of impedance measurement results. It was shown that electrochemical method is effective for study of corrosion characteristics of ZSC on steel. We proposed an interpretation of the deterioration over time of the ability of zinc particles in paint to provide cathodic protection for carbon steel. The results show that the value of Ecorr is between -0,9 and -1,1 V / SCE for ten days of diving. This means that there is an electrical contact between the zinc particles, which provides good cathodic protection for the steel substrate and most of the zinc particles were involved in the osmosis process. The good characteristics of the TTL-VN coating during immersion in a 3,5% NaCl solution can also be explained by the preservation of corrosive zinc products in the coating, which allows the creation of random barrier properties.

scholarly journals Material Application of a Transformer Box: A Study on the Electromagnetic Shielding Characteristics of Al–Ta Coating Film with Plasma-Spray Process

Coatings ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 495 ◽  
Author(s):  
Fei-Shuo Hung
Keyword(s):  
Stainless Steel ◽  
Structural Characteristics ◽  
Steel Substrate ◽  
Pure Aluminum ◽  
Multilayer Coating ◽  
Thickness Effect ◽  
Stress Effect ◽  
Coating Film ◽  
Coating Structure ◽  
Frequency Condition

In this study we present the results of two experiments. In the first one, a Ta–Al–SS (stainless steel (SS)) multilayer coating structure was prepared using plasma spraying equipment to investigate the coating structure and interface properties. In the second one, Ta–Al on multilayer glass was prepared using the sputtering process to measure the thickness effect of thin film on electromagnetic wave shielding (EMI) characteristics and on the design of high-power switchboard covers. According to the experimental results, the multilayer structure of Ta–Al on SS improves the mechanical properties of a stainless steel plate by enhancing the explosion-proof property. An appropriate thickness of the plasma-sprayed pure aluminum layer can increase the adhesion to the stainless steel substrate and buffer the stress effect. After heat treatment (annealing), the Ta–Al–SS multilayer structural characteristics are excellent and suitable for shielding effects at different temperatures and humidity, which can be used as a reference for the engineering application of communication rooms and base power stations. According to EMI test of multi-coated glass (Ta–Al–glass), by increasing the thickness of Ta layer, we cannot effectively improve full-frequency EMI shielding with improved shielding at low-mid frequency condition. In addition, the Ta–Al interface formation of an Al–Ta–O compound layer can improve the adiabatic effect to reduce the thermal conductivity.

Fragmentation behavior of Y 2 O 3 suspension in axially fed suspension plasma spray

2017 ◽  
Vol 309 ◽  
pp. 456-461 ◽  
Author(s):  
Jung-ki Lee ◽  
Sang-Jun Park ◽  
Yoon-Suk Oh ◽  
Seongwon Kim ◽  
Hyungsun Kim ◽  
...  
Keyword(s):  
Plasma Spray ◽  
Suspension Plasma Spray ◽  
Fragmentation Behavior
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