The mechanical properties of Al-TiC metal matrix composites fabricated by a flux-casting technique

Karantzalis, A. E.; Wyatt, S. M.; Kennedy, Andrew R.

doi:10.1016/s0921-5093(97)00290-6

Cited by 94 publications

(43 citation statements)

References 14 publications

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“…SiC, B 4 C, and TiC are excellent reinforcement materials for Al-MMCs, due to their high hardness and chemical and thermal stability [2][3][4][5], but carbides, in particular SiC, tend to react and dissolve in molten Al, leading to the formation of Al 4 C 3 and ternary Al-Si-C carbides during solidification [6]. Al 4 C 3 has been widely reported in Al-SiC composites produced by melt-stir casting, in which the temperatures involved are relatively low (under 1200 K) [7,8].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and wear studies of laser clad Al-Si/SiC(p) composite coatings

Anandkumar

Almeida

Colaço

et al. 2007

Surface and Coatings Technology

106

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Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. and Si increase the hardness of the material by dispersion hardening but do not contribute to its abrasive wear resistance, because they are softer than the abrasive particles, and confirm that the parameters used to prepare Al-Si-SiC composite coatings by laser cladding must be selected so that only minimal reactions occur between SiC and molten Al.

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Section: Introductionmentioning

confidence: 99%

Microstructure and wear studies of laser clad Al-Si/SiC(p) composite coatings

Anandkumar

Almeida

Colaço

et al. 2007

Surface and Coatings Technology

106

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“…[8][9][10] Also, it is crucial to achieve a uniform distribution of nanoparticles through the matrix and good bonding between the matrix and nanoparticles in order to maximize composite mechanical properties. [11][12][13] Although there are a number of available fabrication routes for MMNCs, an ultrasonic method, [5,14] which combines casting with ultrasonic cavitation-based dispersion of nanoparticles in molten alloys, seems an economical and promising route in terms of producing engineering components with complex shapes. [7,15] In the fabrication of MMNCs by liquid state routes, poor wettability (which can affect the bonding at the reinforcement-matrix interface) and the tendency of ceramic nanoparticles to agglomerate and cluster due to their large surface-to-volume ratio are the main barriers to obtaining a uniform dispersion of nanoparticles into the matrix.…”

Section: Metal Matrix Nanocomposites (Mmncs)mentioning

confidence: 99%

Thixoforming of A356/SiC and A356/TiB2 Nanocomposites Fabricated by a Combination of Green Compact Nanoparticle Incorporation and Ultrasonic Treatment of the Melted Compact

Kandemir

Atkinson

Weston

et al. 2014

Metall Mater Trans A

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Thixoforming is a type of semi-solid processing which is based on forming metals in the semisolid state rather than fully liquid or solid state. There have been no reports of the thixoforming of nanocomposites in the literature. The incorporation of ceramic nanoparticles into liquid metals is a challenging task for the fabrication of metal matrix nanocomposites due to their large surface-to-volume ratio and poor wettability. Previous research work by a number of workers has highlighted the challenges with the incorporation of nanoparticles into liquid aluminum alloy. In the present study, SiC and TiB 2 nanoparticles with an average diameter between 20 and 30 nm were firstly incorporated into green compacts by a powder forming route, and then the compacts were melted and treated ultrasonically. The microstructural studies reveal that the engulfment and relatively effective distribution of the nanoparticles into the melt were achieved. The hardness was considerably improved with only 0.8 wt pct addition of the nanoparticles. The nanocomposites were successfully thixoformed at a solid fraction between 0.65 and 0.70. The microstructures, hardness, and tensile mechanical properties of the thixoformed nanocomposites were investigated and compared with those of the as-received A356 and thixoformed A356 alloys. The tensile properties of the thixoformed nanocomposites were significantly enhanced compared to thixoformed A356 alloy without reinforcement, indicating the strengthening effects of the nanoparticles.

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“…Moreover, good wettability properties have a favorable influence on microstructure of the alloy [7]. In addition to various ceramic particulates [8], [9], B 4 C is also used in the design of the metal matrix composites (MMC) [6], [10] and a better mechanical strength can be obtained [11]. Because of its unique strength and corrosion resistance, Al7075 alloys, which have been used in aviation and space industry, are both used commercially and become the center of interest for research and development Works.…”

Section: Introductionmentioning

confidence: 99%

Effect of sub-Zero Treatment on Ageing of Aluminium Composite

Taşkesen¹,

Aksöz²,

Özdemir³

2018

IJMMM

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Abstract-In this study, B4C reinforced 7075 Al composites were fabricated by cold and hot pressing of Al, Cu, Zn and Mg elemental powders. Two different reinforcement rates (10% and 15%) were used for the composites. In order to examine the structural and mechanical properties, different sub-zero and ageing processes were applied to the composites. Sub-zero and stepped ageing treatments were applied after solutionizing at 470 o C for different time periods. It was found that hardness of the composite was substantially increased and micro structure was changed. Findings show that, general strength of the material significantly increased particularly after solutionization process.Index Terms-B4C, aluminium composite, sub-zero treatment, ageing.

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The mechanical properties of Al-TiC metal matrix composites fabricated by a flux-casting technique

Cited by 94 publications

References 14 publications

Microstructure and wear studies of laser clad Al-Si/SiC(p) composite coatings

Microstructure and wear studies of laser clad Al-Si/SiC(p) composite coatings

Thixoforming of A356/SiC and A356/TiB2 Nanocomposites Fabricated by a Combination of Green Compact Nanoparticle Incorporation and Ultrasonic Treatment of the Melted Compact

Effect of sub-Zero Treatment on Ageing of Aluminium Composite

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