Morphological and phase evaluation of Al/15 wt.% BN nanocomposite synthesized by planetary ball mill and sintering

Gostariani, Reza; Asadabad, Mohsen Asadi; Ebrahimi, R.

doi:10.1016/j.apt.2017.06.004

Cited by 13 publications

(5 citation statements)

References 17 publications

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“…The structure of Al/BN composite powders and their solid solution formation during planetary ball milling were studied by a number of researchers [5][6][7]. It is well documented that high energy planetary ball milling can lead to the dissolution of BN in the Al matrix as a solid solution.…”

Section: Discussionmentioning

confidence: 99%

“…Phase transformations such as the dissolution of BN during milling in the Al matrix and the insitu phase formation in subsequent annealing has been investigated as the challenging topic in the fabrication of Al/BN composite, particularly at elevated temperatures [5][6][7]13]. Dissolution of BN in Al matrix in the milling process and the formation of AlN and AlB 2 in-situ phases during the annealing process of Al-15 wt.% BN were reported previously in several studies [6,7]. In lower contents of BN, the elimination of BN during the milling process is facilitated but the probability of the formation of in-situ phases in the hot extrusion post-processing becomes lower.…”

Section: Phase Evaluationmentioning

confidence: 99%

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Fabrication of Al/AlN in-situ nanocomposite through planetary ball milling and hot extrusion of Al/BN: Microstructural evaluation and mechanical behavior

Gostariani

Bagherpour

Rifai

et al. 2018

Journal of Alloys and Compounds

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In this study, Al/AlN in-situ nanocomposites were fabricated using Al/BN as the starting composite powders. The impact of adding hexagonal boron nitride (BN) to the Al matrix of commercial purity on the microstructure and mechanical behavior of the fabricated in-situ nanocomposites was investigated. Samples including 1, 2, and 4 wt.% boron nitride nanoparticles were produced by planetary ball milling of the composite powders and a post-process of hot extrusion. Scanning transmission electron microscopy revealed that boron nitride nanoparticles dissolved as a solid solution of B and N in the Al matrix at the as-milled state. Through the process of hot extrusion, AlN as the in-situ phase was formed by a reaction between Al and N. These led to improve the mechanical properties as well as grain refinement of Al/AlN nanocomposite. The average grain size of the fabricated composites with the use of 1, 2 and 4 wt.% BN was measured about 910, 823, and 760 nm respectively. It was found that combined strengthening mechanisms of grain refinement, a solid solution of mostly B and AlN in-situ phase formation improved the mechanical properties of Al/AlN nanocomposite. With the use of 1, 2, and 4 wt.% BN, the tensile strength of nanocomposite samples increased approximately 40, 56, and 57% in comparison with pure Al, respectively. The remarkable change in microstructure and mechanical properties of the nanocomposite was obtained when the content of BN is up to 2 wt.%.

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Section: Discussionmentioning

confidence: 99%

Section: Phase Evaluationmentioning

confidence: 99%

Fabrication of Al/AlN in-situ nanocomposite through planetary ball milling and hot extrusion of Al/BN: Microstructural evaluation and mechanical behavior

Gostariani

Bagherpour

Rifai

et al. 2018

Journal of Alloys and Compounds

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“…It is well recognized that BN decomposed and dissolved in the Al matrix during high energy ball milling. Then, the possible AlN and AlB 2 as the in-situ phases are generated during a heating state in the Al matrix [10][11][12][13][14][15][16][17]. Due to presence of in-situ particles in matrix, the microstructural observation and mechanical behavior of the in-situ Al/BN nanocomposite should be investigated by high resolution transmission electron microscopy.…”

Section: Transmission Electron Microscopy In the Study Of Al/bn Nanoc...mentioning

confidence: 99%

Transmission Electron Microscopy of Nanomaterials

Eskandari¹,

Gostariani²,

Asadabad³

2020

Electron Crystallography

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Structural and analytical characterization, in the nanometer scale, has become very important for all types of materials in recent years. Transmission electron microscope (TEM) is a perfect instrument for this purpose, which is summarized in this chapter. Parameters such as particle size, grain size, lattice type, morphological information, crystallographic details, chemical composition, phase-type, and distribution can be obtained by transmission electron micrographs. Electron diffraction patterns of nanomaterials are also used to acquire quantitative information containing size, phase identification, orientation relationship and crystal defects in the lattice structure, etc. In this chapter, typical electron diffraction, highresolution transmission and scanning transmission electron microscope imaging in materials research, especially in the study of nanoscience are presented.

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“…For the past twenty years, research has focused on identifying ceramic particles that can potentially rein-force various grades of aluminum alloys, evaluating their compatibility with different manufacturing methods, and assessing their microstructural, mechanical, and tribological properties. Some common ceramic materials used in AMMCs include titanium dioxide (TiO2), titanium boride (TiB2), titanium carbide (TiC), alumina (Al2O3), boron carbide (B4C), silica (SiO2), and boron nitride (BN) [3,4]. Among these materials, TiC and BN are highly appealing materials owing to their characteristics like low density, high melting point, exceptional mechanical properties, and the capacity to absorb neutrons, as well as a strong bonding capability with aluminum and its alloys.…”

Section: Introductionmentioning

confidence: 99%

EFFECT OF TiC AND BN NANOPARTICLES ON MECHANICAL AND MICROSTRUCTURAL CHARACTERISTICS OF Al7085 HYBRID NANOCOMPOSITES

Garapati,

Dumpala,

Rao

2024

CTP

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This study regards investigations of the mechanical properties of aluminum 7085/TiC/BN hybrid metal matrix nanocomposites (HMMNCs). The ultrasonic assisted stir casting (UASC) route was used to manufacture the Al7085 HMMNCs by varying the wt.% of titanium carbide (TiC) and boron nitride (BN) (0.0, 0.5, 1.0, 1.5, and 2.0). By means of scanning electron microscopy (SEM) it was observed that the nanoparticles are evenly distributed in the nanocomposites. Additionally, the EDS and XRD results indicate that there were no signs of oxide formations, secondary phases, or impurities in the nanocomposites. The yield tensile strength (YTS), ultimate tensile strength (UTS) and microhardness of the nanocomposites improved with increases in the wt.% of TiC and BN particles up to 1.5, and thereafter decreased. The % elongation of the nanocomposites was reduced and the density of the nanocomposites improved with the addition of TiC and BN nanoparticles.

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Morphological and phase evaluation of Al/15 wt.% BN nanocomposite synthesized by planetary ball mill and sintering

Cited by 13 publications

References 17 publications

Fabrication of Al/AlN in-situ nanocomposite through planetary ball milling and hot extrusion of Al/BN: Microstructural evaluation and mechanical behavior

Fabrication of Al/AlN in-situ nanocomposite through planetary ball milling and hot extrusion of Al/BN: Microstructural evaluation and mechanical behavior

Transmission Electron Microscopy of Nanomaterials

EFFECT OF TiC AND BN NANOPARTICLES ON MECHANICAL AND MICROSTRUCTURAL CHARACTERISTICS OF Al7085 HYBRID NANOCOMPOSITES

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