Aluminium nitride layers prepared by nitrogen arc discharge on Al-Si alloy substrate

Li, Xin; Xin, Weida; Ren, Zhenan; Wang, Yanxin; Wang, Wenquan

doi:10.1016/j.jmatprotec.2020.116847

Cited by 5 publications

(4 citation statements)

References 24 publications

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“…This morphology may be related to the formation of an intermediate Si 3 N 4 phase. The formation of AlN from liquid Al can be catalyzed by the addition of Si because of the nitridation of Si (3Si + 4N = Si 3 N 4 ) and the displacement reaction of Si 3 N 4 to AlN (Si 3 N 4 + 4Al = 4AlN + 3Si) [49]. In particular, the arc plasma-induced displacement reaction can result in the formation of cocontinuous nitride structures [14], whose morphology is similar to that of the AlN agglomerates shown in Figure 5b.…”

Section: Mechanism Of In Situ Synthesis Of Al/aln Composite Ingotsmentioning

confidence: 99%

Microstructural Characterization of In Situ Aluminum Matrix Composites with Interconnected Aluminum Nitride Produced by Arc Plasma-Induced Accelerated Volume Nitridation

Jeong,

Kim,

Lee

2023

Metals

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We present a strategy for fabricating aluminum (Al) matrix composites (AMCs) reinforced with interconnected aluminum nitride (AlN) via arc plasma-induced accelerated volume nitridation. AMCs with 10 vol.% AlN are formed in situ by the reaction between liquid Al alloy and nitrogen gas within 1 min of arc melting, revealing very high formation rate of AlN (3.28 × 10−1 g/min·cm3). The rapid nitridation is attributed to the improved wettability and spontaneous infiltration of the melt, which results in the formation of AlN agglomerates and lamellas. In particular, Al-12Si/AlN composites exhibit over two times higher yield strength (195 MPa) than the Al/AlN composites (70 MPa) when compressed along the longitudinal direction to the lamellas. The coefficient of thermal expansion (CTE) is about 30% lower in the Al-12Si/AlN composites (17.0 × 10−6/K) than pure Al (23.6 × 10−6/K). This is attributed to the interconnected AlN architecture and Al–Si eutectic microstructure, which constrain the thermal expansion of the Al matrix. The present AMCs afford an attractive combination of specific thermal conductivity and CTE. These findings would facilitate the development of novel AMCs reinforced with interconnected AlN as cost-effective heat sink materials.

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Section: Mechanism Of In Situ Synthesis Of Al/aln Composite Ingotsmentioning

confidence: 99%

Microstructural Characterization of In Situ Aluminum Matrix Composites with Interconnected Aluminum Nitride Produced by Arc Plasma-Induced Accelerated Volume Nitridation

Jeong,

Kim,

Lee

2023

Metals

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“…And the oxidation depth of the sample is about 250 nm, which may be related to the nanoscale natural oxidation of the sample surface treated by plasma. 16,32) After several tests, the nitriding depth of plasma-treated samples is about 0.5-2 μm. 026001-4…”

Section: -2mentioning

confidence: 99%

“…Li et al successfully prepared about a 200 μm nitride layer on the surface of Al-Si samples by the movable nitrogen dc thermal arc with discharge current 90 A. 16,17) However, the high temperature of the thermal arc causes the serious melting of the substrates. In fact, a large amount of residual stress will be produced owing to the large difference of thermal expansion coefficient between aluminum and aluminum nitride, which leads to cracks in the nitrided region.…”

Section: Introductionmentioning

confidence: 99%

Aluminum surface nitriding by an atmospheric-pressure non-thermal plasma technique

Ma¹,

Sun²,

Zheng³

et al. 2022

Jpn. J. Appl. Phys.

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The application of aluminum is often limited by low hardness, and plasma nitriding can make it have excellent mechanical property. The purpose of this study is to nitride the aluminum surface by non-thermal transferred arc plasma technology. During the plasma nitriding process, the maximum effective value of output current is about 390 mA and the overall temperature of the samples is much lower than the solidus temperature. It is found that the microstructure and mechanical properties of the aluminum surface are improved by adding hydrogen into the nitrogen plasma. Compared with the surface treated by pure N2 plasma, the particle size of aluminum surface treated by N2/H2 plasma is smaller. The surface hardness of aluminum is nearly doubled after being treated in 6.0 vol%H2 + 94.0 vol%N2 atmosphere.

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“…Among these, more and more attention has been paid to thermal spraying technology because of its low cost, flexible operation, high degree of automation, not limited by the size of the workpiece, easy on-site construction and maintenance, easy to master, and relatively less environmental pollution than other methods. [8][9][10][11][12][13][14][15] The sprayed aluminum coating on the surface of the composite material has been applied to conduct electricity and lightning protection on the leading edges and ends of the wings and the outer surface of the fairing of Boeing aircraft. 16 Thermal spraying is an important technology in the field of surface engineering.…”

Section: Introductionmentioning

confidence: 99%

Research on the technology of flame spraying aluminum coating for composite material

Guo

Zhu

et al. 2023

Composites and Advanced Materials

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Aluminum coating was prepared on composite material surface by using oxygen-acetylene flame spraying technology. The H01-103H sealants were used to seal the thermal sprayed aluminum coatings. The characteristics of the aluminum coatings with and without H01-103H sealant, including surface morphologies, phase composition, and bonding strength, were investigated by means of SEM, EDS, and mechanical testing machine. Thermal shock experiment and low temperature cooling test were also used to examine the thermal shock resistance and frost resistance of the Al coatings. Electrical conductivity and electromagnetic shielding properties were then tested according to four-probe measurement principle and GJB 5239-2004, respectively. The results showed that the bond strength was 7.36 MPa and the surface porosity was about 5.21% for Al coating without H01-103H sealant, in addition, the H01-103H sealants could fill into the pores, reducing the porosity and increasing the bond strength of the coating. Furthermore, the main component of the coating was Al, the oxygen content was only 1.43%. Flame sprayed aluminum coating, with surface electrical resistance 0.89 mΩ and 5–18 GHz electromagnetic shielding effectiveness above 35 dB, was an ideal candidate for electromagnetic shielding utilization. The Al coating remained intact, compact, no cracks, peeling, layering under 50–200°C and −30°C, which showed good thermal shock resistance and frost resistance.

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Aluminium nitride layers prepared by nitrogen arc discharge on Al-Si alloy substrate

Cited by 5 publications

References 24 publications

Microstructural Characterization of In Situ Aluminum Matrix Composites with Interconnected Aluminum Nitride Produced by Arc Plasma-Induced Accelerated Volume Nitridation

Microstructural Characterization of In Situ Aluminum Matrix Composites with Interconnected Aluminum Nitride Produced by Arc Plasma-Induced Accelerated Volume Nitridation

Aluminum surface nitriding by an atmospheric-pressure non-thermal plasma technique

Research on the technology of flame spraying aluminum coating for composite material

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