Mechanical and microstructural characterization of dispersion strengthened Al–C system nanocomposites

Santos-Beltrán, A.; Gallegos-Orozco, V.; Reyes, R. Goytia; Miki‐Yoshida, M.; Estrada-Guel, I.; Martínez-Sánchez, R.

doi:10.1016/j.jallcom.2009.09.133

Cited by 20 publications

(12 citation statements)

References 19 publications

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“…An evident increase of microstrains values (from 0.185 to ~0.2 %) was observable, product of the Al 4 C 3 phase formation with the sintering time. The increase of the microstrain values correspond well with the increase of the Al 4 C 3 phase concentration with the sintering time[24][25][26][27].Table IIIshows the lattice parameter of the composites as a function of sintering time. The small change of the lattice parameter of the Al matrix with the sintering time (˂ 0.075%) means that a relatively small amount of C was introduced in the Al matrix in solid solution during the mechanical milling.…”

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confidence: 82%

Characterization of Al–Al4C3 nanocomposites produced by mechanical milling

Santos-Beltrán

Goytia-Reyes

Morales-Rodriguez

et al. 2015

Materials Characterization

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confidence: 82%

Characterization of Al–Al4C3 nanocomposites produced by mechanical milling

Santos-Beltrán

Goytia-Reyes

Morales-Rodriguez

et al. 2015

Materials Characterization

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“…The powders obtained from mechanical milling are compressed into the desired shape and then subjected to a sintering process at temperatures below the melting point of the lighter component, inducing the particles to bond [2,3]. A new generation of materials can be produced by combining PM methods and mechanical milling (MM), which have characteristics that consist of a metallic matrix with a fine microstructure reinforced with homogeneous nanoscale hard particles [4][5][6][7]. The MM route has been widely accepted to manufacture MMNC due to its easy operation and mass production.…”

Section: Introductionmentioning

confidence: 99%

Effect on Microstructure and Hardness of Reinforcement in Al–Cu with Al4C3 Nanocomposites

Orozco

Beltrán

et al. 2021

Metals

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By superposition, the individual strengthening mechanisms via hardness analyses and the particle dispersion contribution to strengthening were estimated for Al–C and Al–C–Cu composites and pure Al. An evident contribution to hardening due to the density of dislocations was observed for all samples; the presence of relatively high-density values was the result of the difference in the coefficients of thermal expansion (CTE) between the matrix and the reinforced particles when the composites were subjected to the sintering process. However, for the Al–C–Cu composites, the dispersion of the particles had an important effect on the strengthening. For the Al–C–Cu composites, the maximum increase in microhardness was ~210% compared to the pure Al sample processed under the same conditions. The crystallite size and dislocation density contribution to strengthening were calculated using the Langford–Cohen and Taylor equations from the microstructural analysis, respectively. The estimated microhardness values had a good correlation with the experimental. According to the results, the Cu content is responsible for integrating and dispersing the Al4C3 phase. The proposed mathematical equation includes the combined effect of the content of C and Cu (in weight percent). The composites were fabricated following a powder metallurgical route complemented with the mechanical alloying (MA) process. Microstructural analyses were carried out through X-ray analyses coupled with a convolutional multiple whole profile (CMWP) fitting program to determine the crystallite size and dislocation density.

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“…Using mechanical alloying subsequent annealing process, Al 4 C 3 -reinforced aluminium was successfully fabricated [1,3,[7][8][9][10][11][12][13][14]. It was noted that Al 4 C 3 is the responsible of reinforcing [2,13].…”

Section: Introductionmentioning

confidence: 99%

“…Once it inhibits the dislocation motion, good mechanical proprieties are achieved even at elevated temperature. However, the efficiency by which reinforcement particles strengthen the matrix depends on their type, size, morphology, volume fraction and overall distribution [11, 15]. With the development of advanced analytical methods in the recent years, enormous progress led to the identification and characterisation of particles at atomic levels.…”

Section: Introductionmentioning

confidence: 99%

Structural proprieties of the Al–Al ₄ C ₃ nanocomposite produced via mechanical alloying and annealing

Bendoumia

Triaa

Azzaz

2017

Micro & Nano Letters

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The Al-Al 4 C 3 nanocomposite was produced via mechanical alloying of Al 6 wt% C mixture for a predetermined time (up to 20 h), followed by annealing. The structural evolution was characterised via X-ray diffraction and transmission electron microscope equipped with electron energy loss spectrometer. In addition, focused ion beam-scanning electron microscopy was used for locating and analysing the reinforcing particles. During milling, the size of aluminium particles reached the nanometre scale with a 54 nm size. After annealing, carbide was homogeneously distributed in the nanostructured aluminium particles with an average size of 50 nm, result in an average hardness of 320 HV. This was observed for the powder that was mechanically milled for 20 h and that underwent annealing from room temperature to 540°C and was maintained at this temperature for 4 h.

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Mechanical and microstructural characterization of dispersion strengthened Al–C system nanocomposites

Cited by 20 publications

References 19 publications

Characterization of Al–Al4C3 nanocomposites produced by mechanical milling

Characterization of Al–Al4C3 nanocomposites produced by mechanical milling

Effect on Microstructure and Hardness of Reinforcement in Al–Cu with Al4C3 Nanocomposites

Structural proprieties of the Al–Al ₄ C ₃ nanocomposite produced via mechanical alloying and annealing

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Mechanical and microstructural characterization of dispersion strengthened Al–C system nanocomposites

Cited by 20 publications

References 19 publications

Characterization of Al–Al4C3 nanocomposites produced by mechanical milling

Characterization of Al–Al4C3 nanocomposites produced by mechanical milling

Effect on Microstructure and Hardness of Reinforcement in Al–Cu with Al4C3 Nanocomposites

Structural proprieties of the Al–Al 4 C 3 nanocomposite produced via mechanical alloying and annealing

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Structural proprieties of the Al–Al ₄ C ₃ nanocomposite produced via mechanical alloying and annealing