Thermal properties of kinetic spray Al–SiC metal-matrix composite

Eesley, G. L.; Elmoursi, Alaa A.; Patel, Nilesh K.

doi:10.1557/jmr.2003.0117

Cited by 34 publications

(24 citation statements)

References 8 publications

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“…(2) are 2.5 lm, 230 W/(m K), and 200 W/(m K), respectively, ITR of the present composites was calculated as 1.5 6 0.3 Â 10 À8 m 2 K/W that is similar to that of AMCs produced by pressure-assisted infiltration 12 or squeeze casting, 13 and that is about ten times lower than that of plasma-sprayed AMCs, which exhibited poor interfacial bonding such as interfacial gaps or sprayed layerlayer boundaries. 25,26 The low ITR of the present composites was attributed to strong interfacial bonding between Al and AlN without any interfacial compound layer. [11][12][13][14] (b) Correlation between TC and ITR in the composites and various ex situ AMCs (V p of second phase is marked with number).…”

mentioning

confidence: 82%

“…Manipulation of thermal properties via APAVN process Figure 8 shows specific TC of the as-rolled Al-AlN composites via APAVN process compared with various pure metals, ceramics, and AMCs as a function of CTE. [11][12][13]25,26 When it comes to materials choice for heat sink applications, the density is a major consideration. 35 Late transition metals such as Mo and W are well known for their high TC with low CTE, but their high density limits their use.…”

Section: à2mentioning

confidence: 99%

“…35 Late transition metals such as Mo and W are well known for their high TC with low CTE, but their high density limits their use. The as-rolled Al-AlN composites exhibit a unique combination of higher specific TC and lower CTE than in situ Al-AlN nanocomposites 11 or plasma-sprayed AMCs, 25,26 which can be manipulated by controlling V p as well as the size of AlN. Furthermore, ITR of Al-AlN interface, prepared by sputtering of Al on AlN single crystal in vacuum, was 4.3 Â 10 À9 m 2 K/W, 36 indicating that TC of the present composites can be further improved by optimizing processing parameters to reduce ITR.…”

Section: à2mentioning

confidence: 99%

“…[11][12][13][14] (b) Correlation between TC and ITR in the composites and various ex situ AMCs (V p of second phase is marked with number). [11][12][13]25,26 Note that in situ AMCs with AlN nanoparticles showed invalid ITR due to their large oxygen contents and poor interface stability.…”

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confidence: 99%

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In situ synthesis of cold-rollable aluminum–aluminum nitride composites via arc plasma-induced accelerated volume nitridation

Lee

Park

2016

J. Mater. Res.

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Our study proposes in situ synthesis of cold-rollable aluminum nitride (AlN) reinforced aluminum matrix composites with attractive thermal properties via arc plasma-induced accelerated volume nitridation (APAVN). Within three minutes of repeated APAVN using commercial nitrogen gas, volume fraction of AlN increased up to 40 vol%, which is the highest value ever reported by in situ nitridation of pure aluminum. The composites contained homogeneously dispersed AlN particulates with strong interfacial bonding and low interfacial thermal resistance, which resulted in unique combination of a relatively low coefficient of thermal expansion and high specific thermal conductivity. APAVN resulted from instantaneous chemisorption of dissociated nitrogen, enhanced diffusion of dissolved nitrogen, and improved wettability, which led to much more AlN formation, ;2.94 Â 10 À1 g/(min cm 3 ), which is about 400 times higher than that in the gas bubbling method. These results would ultimately give us a promising strategy for continuous production of in situ Al-AlN composites for heat sink applications through cost-effective processing.

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confidence: 82%

Section: à2mentioning

confidence: 99%

Section: à2mentioning

confidence: 99%

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confidence: 99%

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In situ synthesis of cold-rollable aluminum–aluminum nitride composites via arc plasma-induced accelerated volume nitridation

Lee

Park

2016

J. Mater. Res.

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“…Porosity reduction of the coatings contributes to further enhanced corrosion resistance [8]. A variety of ceramics such as Al 2 O 3 [10,13], SiC [14][15][16][17], and TiN [18,19] have been investigated as the secondary phase in metallic matrix ceramic composites.…”

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confidence: 99%

Cold‐Sprayed Aluminum‐Silica Composite Coatings Enhance Antiwear/Anticorrosion Performances of AZ31 Magnesium Alloy

Fang

Gao

et al. 2018

Advances in Materials Science and Engineering

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Extensive efforts devoted in recent years to booming structural applications of lightweight magnesium alloys are usually undermined by their insufficient surface properties. Surface modification is therefore necessarily required in most cases for enhanced surface integrity of the alloys. Here, we report construction of aluminum-silica protective layers by cold spray on AZ31 magnesium alloys, and the effect of the silica additives on microstructure and mechanical properties of the coatings was examined. e ceramic particles were dispersed evenly in the coatings, and increased silica content gives rise to enhanced adhesion, antiwear performances, and microhardness of the coatings. e even distribution of silica in the coatings altered the wear regimes from adhesive to abrasive wear. e cold spray fabrication of the aluminum-silica protective coatings would facilitate structural applications of the magnesium alloys.

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Characterizations of Cold‐sprayed TiN Particle‐reinforced Al Alloy‐based Composites – from Structures to Tribological Behaviour

Zhang

Guo

et al. 2007

Adv Eng Mater

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Al and its alloys find applications in automobile, defense and aerospace sectors in terms of their specific weight, corrosion resistance and thermal conductivity. However, they have poor tribological characteristics. [1] One typical solution for increasing the tribological performance of Al and its alloys is to incorporate ceramic particles into the metallic matrix. The fabrication of metal matrix composites (MMCs) is of great significance in applications owing to their excellent combination of higher specific strength and improved wear resistance over their base alloys. [1][2][3] The particle-reinforced MMCs are among the most widely used composite materials, which can be produced through a number of routes including melt processing and powder metallurgy, such as casting, sintering, hot pressing and thermal spraying. [1][2][3][4][5][6][7][8][9][10][11][12][13] Because of the difficulty in obtaining a good density by sintering, most particlereinforced MMCs have previously been prepared by hot pressing. However, this increases costs and there is a limitation in terms of shapes of products that can be manufactured by hot pressing. [4] On the other hand, Al based MMCs (AMMCs) of good wear resistance could be obtained by thermal spraying (TS). [3,5] However, the oxidation of metallic materials at elevated temperatures during TS will occur except under a vacuum or inert condition, which will increase the fabrication cost and limit the flexibility in applications. [3,5] Recently, the emerging cold spraying (CS) technique has been widely investigated owing to its high deposition efficiency and volume production of deposits or parts. In this process, the deposition of particles takes place through their intensive plastic deformation upon impact in a solid state at a temperature well below the melting point of spray material. Consequently, the deleterious effects of oxidation, phase transformation, decomposition, grain growth and other problems inherent to conventional TS techniques can be minimized or eliminated. [14] A variety of deposits have been applied by CS, including metals and alloys, [14,15,[26][27][28][29][30] composites, [16][17][18][19][20][21][22][23][24][25][31][32][33] and even nanostructured materials. [34,35] Although CS has been shown the capability to form AMMCs according to some pioneer works [16][17][18][19] and our primary study, [20] a large amount of research work is required to develop both scientific and practical knowledge of CS MMCs.The previous studies [16][17][18][19][20][21][22] showed that a dense AMMC was produced by CS of a simple powder blend with hard particles uniformly dispersed in a matrix. As noticed in the fabrication of MMCs by conventional routes, [1][2][3][4][5][6][7][8][9][10][11][12][13] , besides the nature of hard particle, particle size, volume fraction and distribution, interface conditions between the soft metal and hard particle will significantly influence the performance of MMCs. Moreover, amongst various reinforcing materials, SiC has been studied extensively. [1,2,4...

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Thermal properties of kinetic spray Al–SiC metal-matrix composite

Cited by 34 publications

References 8 publications

In situ synthesis of cold-rollable aluminum–aluminum nitride composites via arc plasma-induced accelerated volume nitridation

In situ synthesis of cold-rollable aluminum–aluminum nitride composites via arc plasma-induced accelerated volume nitridation

Cold‐Sprayed Aluminum‐Silica Composite Coatings Enhance Antiwear/Anticorrosion Performances of AZ31 Magnesium Alloy

Characterizations of Cold‐sprayed TiN Particle‐reinforced Al Alloy‐based Composites – from Structures to Tribological Behaviour

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