In Situ Fabrication of AlN Coating by Reactive Plasma Spraying of Al/AlN Powder

Shahien, Mohammed; Yamada, Motohiro; Yasui, Toshiaki; Fukumoto, Masahiro

doi:10.3390/coatings1020088

Cited by 18 publications

(4 citation statements)

References 28 publications

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“…Tables 2 and 3 summarize the different methods of producing AlN coatings and powder, respectively. [37] CVD = Chemical vapor deposition; LT = Low temperature.…”

Section: Synthesis Methods Of Alnmentioning

confidence: 99%

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

2021

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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.

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“…Tables 2 and 3 summarize the different methods of producing AlN coatings and powder, respectively. [37] CVD = Chemical vapor deposition; LT = Low temperature.…”

Section: Synthesis Methods Of Alnmentioning

confidence: 99%

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

2021

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“…Aluminium nitride is a semiconductor material with excellent properties such as high acoustic velocity, a high coupling constant [1,2], high thermal conductivity [1][2][3][4][5], a high dielectric constant, and good thermal and chemical stability [1,6,7]. The addition of Si to AlN leads to the formation of a two-phase nc-AlN/a-SiNx nanocomposite coating and contributes to an increase in hardness, thermal stability and oxidation resistance [8].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Addition of the Elements Ti and Cr on the Structure, and Mechanical and Tribological Properties of AlSiN Coatings

Petkov

Bakalová

Bahchedzhiev

et al. 2022

JNanoR

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The influence of Al/Ti and Al/Cr ratios on the structural, mechanical and tribological properties of AlTiSiN and AlCrSiN coatings, deposited by the cathodic arc evaporation PVD method at a temperature of 400°C, was investigated. The remains of the original AlSiN hexagonal phase were observed in the obtained coatings as well as the crystallites of cubic TiN and CrN, respectively. XPS analysis assumes the presence of a substoichiometric SiN. The addition of 11 at.% Ti or 13 at.% Cr in AlSiN led to an increase in both the coating’s resistance to plastic deformation and the plasticity index. The addition of 13 at.% and 24 at.% Cr to the AlSiN coating structure resulted in a decrease in the average coefficient of friction with 18% and 36% against a counterpart of Al2O3, respectively, and with 36% for both concentration against steel ball counterpart. The addition of Ti have no influence on the values of the coefficient of friction at using ceramic counterpart, while at steel counterpart decreased it up to 30%. Both element change the abrasion effect of the coating.Keywords:AlCrSiN; AlTiSiN;Cathodic Arc Deposition; Tribological Behaviour; Abrasion Resistance; Nanoindentation

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“…Reactive plasma spraying (RPS) is a promising solution to fabricate AlN based coatings . Several AlN based coatings were successfully fabricated through plasma nitriding of Al powders, Al–AlN mixtures, Al 2 O 3 powders, and Al 2 O 3 –AlN mixtures, in atmospheric N 2 –H 2 plasma. Although, it was possible to fabricate thick AlN coatings with uniform microstructure.…”

Section: Introductionmentioning

confidence: 99%

Influence of Transient Liquid Phase Promoting Additives upon Reactive Plasma Spraying of AlN Coatings and Its Properties

2018

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and YAG) are fabricated. Fine Y 2 O 3 acts as transient liquid phase promoting additive, and reacts with Al 2 O 3 phase (from feedstock mixture and on AlN particles surface) to create wetting agent of yttrium aluminate Y-Al-O around solid AlN particles. However, due to rapid solidification rates of plasma, it is difficult to react with the interspersed oxygen in AlN grains. The Y 2 O 3 addition significantly reduces the coatings oxide content due to the consumption of starting Al 2 O 3 to form the YAG. Influence of Y 2 O 3 significantly observes with increasing AlN feedstock and high AlN content coatings with small oxides are fabricated by RPS of 80AlN-10Al 2 O 3 -10Y 2 O 3 mixture. Thermal conductivity is improved with using Y 2 O 3 and increasing AlN feedstock. However, the conductivity is not so high compared to the AlN compacts, due to increased porosity, incomplete sintering of the formed initial liquid phase state, remaining oxide content, and low density of the coatings.

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In Situ Fabrication of AlN Coating by Reactive Plasma Spraying of Al/AlN Powder

Cited by 18 publications

References 28 publications

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

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

Influence of the Addition of the Elements Ti and Cr on the Structure, and Mechanical and Tribological Properties of AlSiN Coatings

Influence of Transient Liquid Phase Promoting Additives upon Reactive Plasma Spraying of AlN Coatings and Its Properties

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