Penetration and adhesion behaviour of boron nitride by liquid aluminium

Xue, X. M.; Wang, J. T.; Zhao, Fenggang

doi:10.1007/bf00741420

Cited by 17 publications

(7 citation statements)

References 8 publications

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“…3. According to Xue et al [15], h-BN can hardly be wetted by pure aluminum until at about 1225 K. Hence, it seems impossible to form AlN and AlB 2 from the original Al/BN mixture at the annealing temperature, and this point of view was also confirmed by Du et al [8]. The equilibrium diagrams [16] of Al-B and Al-N indicate an ignorable solubility of boron and nitrogen in aluminum at room temperature.…”

Section: Resultsmentioning

confidence: 66%

Structural evolution of Al/BN mixture during mechanical alloying

Xia

Lü

et al. 2005

Journal of Alloys and Compounds

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Section: Resultsmentioning

confidence: 66%

Structural evolution of Al/BN mixture during mechanical alloying

Xia

Lü

et al. 2005

Journal of Alloys and Compounds

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“…For the A1-BN system, there is no solubility between aluminium and BN, therefore the formation of the interface is determined by the chemical reaction with each other. In the study of EPMA and XRD for the interface of A1-HP-BN and A1-CVD-BN, we noted that a stable interfacial reaction layer formed of A1N and aluminium boride, between liquid aluminium and boron nitride [7,8]. The reaction layer retarded the further reaction between liquid aluminium and boron nitride, so the temperature of the "nonwetting-wetting" transition of A1 BN is higher than that of A1-SiC.…”

Section: Wettabilitymentioning

confidence: 91%

“…Since a stable interface formed in the AI BN system and there existed a layer of A1N on the bottom of liquid A1 drop [7,8], when the system reached thermodynamic equilibrium, i.e. the wetting angle constant, the surface energy of liquid A1 (YIv~A~)), the surface energy of solid BN (7s~BN)) and the interfacial energy of liquid Al-solid A1N (YsI(AI/AIN)) could be given by Young's equation as follows ~ts(BN) : ~sI(AI/AIN) + "YIv(AI) COS 0 (1)…”

Section: Interfacial Energy and Surface Energymentioning

confidence: 99%

Wettability and spreading kinetics of liquid aluminium on boron nitride

Xue,

Wang,

Quan

1991

J Mater Sci

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The wettability and spreading kinetics of liquid AI on CVD-BN were investigated by the sessile drop method in a vacuum of about 1.1x10 apaat 1070to 1430K. The wettability on the AI BN system was different from that of the AI-SiC system reported in the literature. The wetting angle of AI-BN linearly decreased with an increase of temperature in high temperature range, and tended towards 15 ~ at 1430 K. Complete wetting could be obtained at about 1470 K. The interface energy between liquid AI and the reaction layer and the surface energy of CVD-BN were calculated by means of Warren thermodynamics analysis. The surface of CVD-BN was examined by XRD. The results show that the surface of CVD-BN was chiefly composed of those low energy planes parallel to (001). According to the relationship of the spreading kinetics from the experiments, the apparent activation energy of the liquid AI spreading on the surface of CVD-BN was calculated. The result shows that the activation energy of interfacial reaction accounts for about 54% of the spread activation energy. The spread of liquid At on CVD-BN was affected by the interfacial reaction, diffusion and liquid movement on the surface.

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“…[11][12][13][14][15][16] Therefore, a further behavior is summarized in a schematic diagram in Figure 15. [11][12][13][14][15][16] Therefore, a further behavior is summarized in a schematic diagram in Figure 15.…”

Section: A Infiltration Behavior B Tensile Propertiesmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10] For the pressureless infiltration in this process, both nitro-Many kinds of ceramic phases have been added as a gen and Mg are needed. [13][14][15][16][17][18] matrix content similar to 6061, fabricated by pressureless infiltration. ), carbides ing the matrix of Al composites in this process, is influenced (SiC, TiC, B 4 C, etc.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of AA6061/BN composite fabricated by pressureless infiltration technique

Lee,

Ahn,

Kwon

2001

Metall Mater Trans A

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Spontaneous infiltration and strengthening behaviors were analyzed in terms of microstructures and tensile properties of AA6061/BN composite fabricated by pressureless infiltration technique in the presence of both Mg and nitrogen. The microstructure and properties were compared with control AA6061 without BN fabricated by the same method. The Mg 3 N 2 formed by the reaction of Mg vapor and nitrogen gas, which coated the particles in the powder bed, is believed to induce spontaneous infiltration through greatly enhancing wetting by means of the reaction Mg 3 N 2 ϩ 2Al © 2AlN ϩ 3Mg. This was identified by the finding of AlN particle layers on the surfaces of prior Al particles in the powder bed, which made contact with the infiltrating melt. In addition, unreacted Mg 3 N 2 was observed outside the composite, where the Al melt did not come into direct contact. Fine AlN particles formed in situ resulted in significant strengthening, even in the control alloy, with no addition of BN. In the composite reinforced with BN, additional AlN was formed by the interfacial reaction of the BN and Al melt as well as by the in situ reaction. Consequently, both the BN particles and the additional AlN particles formed by the interfacial reaction led to a further strengthening in the composite, as compared to the control alloy, which was strengthened only by the AlN particles formed in situ. In addition, the flake shape of BN may have lent considerable strength, due to the high aspect ratio it demonstrates, as compared with that of a spherically shaped particle.

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Penetration and adhesion behaviour of boron nitride by liquid aluminium

Cited by 17 publications

References 8 publications

Structural evolution of Al/BN mixture during mechanical alloying

Structural evolution of Al/BN mixture during mechanical alloying

Wettability and spreading kinetics of liquid aluminium on boron nitride

Characteristics of AA6061/BN composite fabricated by pressureless infiltration technique

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