Wetting of Binary Aluminum Alloys in Contact with Be, B<sub>4</sub>C, and Graphite

Manning, C. R.; Gurganus, T.B.

doi:10.1111/j.1151-2916.1969.tb11193.x

Cited by 70 publications

(8 citation statements)

References 4 publications

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“…A similar phenomenon was observed for A13 Ti too, and it has been seen from the data reported earlier that bond integrity between A1 and these reinforcements are excellent. Thus good wetting of TiC by A1 occurs as has been reported in the literature (Samsonov et al 1968;Manning andGurganus 1969: Rhee 1970).…”

Section: Metal ! Ceramicsupporting

confidence: 82%

Interfaces in discontinuously reinforced metal matrix composites: An overview

Mitra

Mahajan

1995

Bull. Mater. Sci.

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The fundamental and engineering aspects pertaining to the matrix-reinforcement interfaces in discontinuously reinforced metal matrix composites are presented in this overview. The interfaces play a key role in determining mechanical properties, namely Young's modulus, yield strength, elongation, creep and fracture behaviour, as well as physical properties like coefficient of thermal expansion, thermal conductivity and damping characteristics of metal matrix composites; these are discussed in detail. The ratio of the experimental value of the Young's modulus to that predicted from the rule of mixtures has been used as a measure of interracial bond strength. Various issues such as the nature of the interfacial bond, chemical reaction at the interfaces, and effect of alloying and processing on the structure of the interfaces and the properties of the composite are examined. In order to exploit the full potential of reinforcing the metallic matrix, the suggested strategies include creation of metallic bonding at the interface, use of in situ processing, choice of right type of alloying elements, and heat treatments and engineering of interfaces.

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Section: Metal ! Ceramicsupporting

confidence: 82%

Interfaces in discontinuously reinforced metal matrix composites: An overview

Mitra

Mahajan

1995

Bull. Mater. Sci.

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“…Neither formation of Ti‐containing phase nor Ti segregation at grain boundary was observed. This result indicates that the surface coating formed by sputter deposition does not stay at the grain boundary during sintering likely due to the poor wettability of B 4 C …”

Section: Resultsmentioning

confidence: 99%

“…Though the addition of Me IV B 2 improves the fracture behavior and toughness of B 4 C, it bears significant density penalty which nullifies the lightweight property of B 4 C. For example, TiB 2 , ZrB 2 , and HfB 2 have densities of 4.52, 6.08, and 10.5 g/cm 3 , respectively, compared to B 4 C (2.52 g/cm 3 ) . Being the lightest among all Me IV B 2 , small amount TiB 2 addition is preferred in search of ways to improve the fracture behavior and toughness of B 4 C. TiB 2 additions between 5 and 88 wt% have been fabricated using the conventional particulate mixing method such as ball milling, through which the dispersion of TiB 2 particulate in B 4 C becomes difficult when the addition amount and particle size of TiB 2 become small …”

Section: Introductionmentioning

confidence: 99%

Small amount TiB₂addition into B₄C through sputter deposition and hot pressing

et al. 2019

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Small amount of TiB2 (<5 wt%) was added into B4C through a novel method that combines the use of sputter deposition and hot pressing. Sputter deposition provided more uniform dispersion of TiB2 grains with smaller grain sizes as compared to the conventional particulate mixing. Small amount TiB2 addition demonstrated to be an effective way for improving the fracture behavior and toughness of B4C while not sacrificing its outstanding lightweight property to a large extent: 2.3 wt% TiB2 addition brought 15% improvement in indentation fracture toughness while resulting in less than 2% increase in density. The improvement can be attributed to the combination of crack impeding by TiB2 grains and crack deflection at the B4C–TiB2 interfaces. TiB2 also played as grain growth inhibitor resulting in a slight increase (2%) in Vickers hardness. Another intention of employing sputter deposition was to modify the grain boundary of B4C; however, neither formation of Ti‐containing phase nor Ti segregation has been observed at grain boundaries likely due to the poor wettability of B4C.

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“…Likewise, Manning and Gurganus clarified that the wettability was improved by adding Cu, Mg and Si. 24) Therefore, a theoretical equation for calculating the volume of hydrostatic pressure required for the molten metal to infiltrate between rods of various diameters and spaced at various intervals was formulated. Figure 12 shows the microstructure of the porous A6061 prepared with 19 rods (diameter: 4 mm, spacing between the rods: 1.5 mm).…”

Section: Measurement Of Cavity Depthmentioning

confidence: 99%

Fabrication of Porous Metals with Unidirectionally Aligned Pores by Rod-Dipping Process

et al. 2019

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Rod-dipping Process" was developed to simultaneously fabricate and strengthen porous metals with pore with unidirectionally aligned throughout their matrix. Carbon rods were dipped into a molten A6061 alloy, quenched, and processed by equal-channel angular extrusion (ECAE). The rods were subsequently removed, producing the porous metal throughout a metallic matrix. To determine the possibility of using our method to fabricate various porous metals, a theoretical equation was formulated for calculating the volume of hydrostatic pressure required for a molten metal to infiltrate the spaces between rods of various diameters and spaced at various intervals. The primary crystal was isotropic, and no reaction products were formed on the pore surfaces. Therefore, the crystal and pore growth directions could be independently controlled. By introducing an equivalent plastic strain of 1.2, the Vickers hardness values of the samples homogeneously increased to 1.5 times higher than that of the as-cast samples. Consequently, this method enabled us to fabricate porous metals with pore with unidirectionally aligned throughout their matrices and whose pore sizes, positions and volume fractions could be arbitrarily controlled. Furthermore, the metallic matrix could be simultaneously hardened by plastic deformation. [

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Wetting of Binary Aluminum Alloys in Contact with Be, B₄C, and Graphite

Cited by 70 publications

References 4 publications

Interfaces in discontinuously reinforced metal matrix composites: An overview

Interfaces in discontinuously reinforced metal matrix composites: An overview

Small amount TiB₂addition into B₄C through sputter deposition and hot pressing

Fabrication of Porous Metals with Unidirectionally Aligned Pores by Rod-Dipping Process

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Wetting of Binary Aluminum Alloys in Contact with Be, B4C, and Graphite

Cited by 70 publications

References 4 publications

Interfaces in discontinuously reinforced metal matrix composites: An overview

Interfaces in discontinuously reinforced metal matrix composites: An overview

Small amount TiB2addition into B4C through sputter deposition and hot pressing

Fabrication of Porous Metals with Unidirectionally Aligned Pores by Rod-Dipping Process

Contact Info

Product

Resources

About

Wetting of Binary Aluminum Alloys in Contact with Be, B₄C, and Graphite

Small amount TiB₂addition into B₄C through sputter deposition and hot pressing