Silicon Carbide Reinforced Aluminum—A Formable Composite

Divecha, A. P.; Fishman, S.G.; Karmarkar, S. D.

doi:10.1007/bf03339487

Cited by 123 publications

(66 citation statements)

References 4 publications

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“…5,6 Particulate composites have the further advantages of being machinable and workable using many conventional processing techniques. Many metals and ceramics have been considered as possible matrix materials.…”

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confidence: 99%

“…4 Discontinuously reinforced metal matrix composites have been demonstrated to offer essentially isotropic properties with substantial improvements in strength and stiffness relative to those available with unreinforced materials. 5,6 Particulate composites have the further advantages of being machinable and workable using many conventional processing techniques. Many metals and ceramics have been considered as possible matrix materials.…”

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Bulk metallic glass matrix composites

Choi-Yim¹,

Johnson²

1997

Applied Physics Letters

356

167

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Composites with a bulk metallic glass matrix were synthesized and characterized. This was made possible by the recent development of bulk metallic glasses that exhibit high resistance to crystallization in the undercooled liquid state. In this letter, experimental methods for processing metallic glass composites are introduced. Three different bulk metallic glass forming alloys were used as the matrix materials. Both ceramics and metals were introduced as reinforcement into the metallic glass. The metallic glass matrix remained amorphous after adding up to a 30 vol% fraction of particles or short wires. X-ray diffraction patterns of the composites show only peaks from the second phase particles superimposed on the broad diffuse maxima from the amorphous phase. Optical micrographs reveal uniformly distributed particles in the matrix. The glass transition of the amorphous matrix and the crystallization behavior of the composites were studied by calorimetric methods. © 1997 American Institute of Physics. ͓S0003-6951͑97͒02852-0͔Recently there has been considerable scientific and industrial interest in a variety of metal matrix composites as a way to improve mechanical properties compared to unreinforced alloys.1-3 Those materials are made by reinforcing alloys with long or short fibers, whiskers, or particles. Continuously reinforced composites provide maximum strength and stiffness in one direction but are anisotropic.4 Discontinuously reinforced metal matrix composites have been demonstrated to offer essentially isotropic properties with substantial improvements in strength and stiffness relative to those available with unreinforced materials. 5,6 Particulate composites have the further advantages of being machinable and workable using many conventional processing techniques. Many metals and ceramics have been considered as possible matrix materials. The most studied metal matrix for application at temperatures below 450°C is aluminum.7 Titanium has been extensively studied from the perspective of higher-temperature applications. 8 In this work, bulk metallic glasses were used as matrices reinforced with refractory ceramics, ductile metal particles, or short wires. This was made possible by the use of recently reported multicomponent alloys that exhibit an extremely high glass forming ability, e.g., La-Al-Ni, 9 Zr-Al-Cu-Ni, 10 and Zr-Ti-Cu-Ni-Be. 11In the work described here, Zr-Ti-Cu-Ni ͑Ref. 12͒ and Zr-Ti͑Nb͒-Al-Cu-Ni ͑Ref. 13͒ alloys, which show extraordinary glass forming ability, were used as the matrix. These bulk metallic glasses have promising properties such as high yield strength and a high elastic strain limit combined with relatively high fracture toughness, fatigue, and corrosion resistance. 14-17 However, they have little ductility in tension. This lack of tensile ductility could be an important drawback in many applications. Thus, one of the motivations for adding second phase particles to the metallic glass was to hinder propagation of shear bands and encourage the formation of multiple shear bands...

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Bulk metallic glass matrix composites

Choi-Yim¹,

Johnson²

1997

Applied Physics Letters

356

167

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“…SiC particle reinforced Al matrix composites (SiCp/Al) can be fabricated by general fabricating methods, such as powder metallurgy (PM), squeeze casting, pressural or pressureless infiltration and spray forming, etc [1,2]. The composites tend to be loose due to the poor wettability between SiC and Al matrix.…”

Section: Introductionmentioning

confidence: 99%

“…The composites tend to be loose due to the poor wettability between SiC and Al matrix. To improve their shaping properties, the second plastic processing, such as the hot extrusion technique, is needed [2,3]. Corbin and Lewandowski have investigated the effects of SiC particle distribution on the mechanical properties of SiCp/Al composites [4].…”

Section: Introductionmentioning

confidence: 99%

Effects of Processing Parameters on Properties of SiCp/Al Composites

Hui

Shao

et al. 2016

MATEC Web Conf.

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Abstract. The effects of hot pressing and hot extrusion temperatures on the properties of 12%SiCp/6066Al (volume fraction) composites fabricated by powder metallurgy have been studied. The experimental results indicate that the hot extrusion, an essential stage of powder metallurgy to produce this sort of particle reinforced metal matrix composites, can redistribute SiC particles in metal matrix and refine the matrix grain size, and that the hot pressing can improve the interfacial cohesion strength between SiC particles and metal matrix. When hot-pressed at temperatures slightly higher than the solidus temperature of the composite and hot-extruded at lower temperatures, the composites are stronger due to the high metal matrix strength and interfacial cohesion. The optimum parameters of hot pressing and hot extrusion in the composites are 560 and 430 , respectively.

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“…SiC particle reinforced Al matrix composites (SiCp/Al) have great potentials to be used in aircrafts, vehicles, weapons and electronic devices, as high-temperature structural materials because of their enhanced damping capacity, high specific strength and stiffness together with the substantial retention of modulus and strength at elevated temperatures [1][2][3][4]. Efforts have been made on measurements of the internal friction in Al matrix composites with discontinuous reinforcements through deformation in a small strain range [5].…”

Section: Introductionmentioning

confidence: 99%

Damping Mechanism of SiC Particle Reinforced Al Matrix Composites

Dong-Yuan

et al. 2016

MATEC Web Conf.

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Abstract. The low-frequency internal friction behavior of SiC particle reinforced Al matrix composites was studied over a temperature range from 23 to 550 at frequencies of 0.1, 1 and 5 Hz. The experimental data were analyzed in terms of the K-G-L dislocation theory and the anelastic relaxation of grain boundary sliding. Two internal friction peaks of the composites were respectively observed over the temperature ranges of 100~250 and 200~500 . The dislocation motion is the important damping mechanism of the composites at low temperatures, while the grain boundary relaxation plays a dominant role at high temperatures. The activation energies for dislocation relaxation and grain boundary sliding are 1.2 eV and 1.57 eV, respectively.

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Silicon Carbide Reinforced Aluminum—A Formable Composite

Abstract: SUMMARY

Cited by 123 publications

References 4 publications

Bulk metallic glass matrix composites

Bulk metallic glass matrix composites

Effects of Processing Parameters on Properties of SiCp/Al Composites

Damping Mechanism of SiC Particle Reinforced Al Matrix Composites

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