Fabrication, characterization, and mechanical properties of spark plasma sintered Al–BN nanoparticle composites

Firestein, Konstantin L.; Steinman, Alexander E.; Golovin, I.S.; Cifré, J.; Obraztsova, Ekaterina A.; Matveev, Andrei T.; Kovalskii, Andrey M.; Lebedev, Oleg I.; Shtansky, Dmitry V.; Golberg, Dmitri

doi:10.1016/j.msea.2015.06.059

Cited by 92 publications

(29 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The addition of Sc 2 O 3 to the HEA was justified from the need to find a cheaper route to achieve the addition of scandium in the HEA system, which is known to enhance phase stability and mechanical properties [18]. Lastly, boron nitride is characterized by low dielectric coefficient and extreme thermal shock resistance, which make it an attractive addition to composite ceramics or to metal alloys [19]; [20]; [21].…”

Section: Resultsmentioning

confidence: 99%

A novel High-Entropy Alloy-based composite material

Riva

Tudball

Mehraban

et al. 2018

Journal of Alloys and Compounds

View full text Add to dashboard Cite

This study reports the results of the addition of different reinforcing agents (i.e. nano-diamonds, SiC, Sc 2 O 3 , h-BN, c-BN and CN) on the sintering process of the B2-structured Al 2 CoCrFeNi High-Entropy Alloy. The best candidate for further thermal, electrical and mechanical characterisation was chosen to be the alloy containing 2 wt.% nano-diamonds. The composite was prepared using spark-plasma sintering of pre-alloyed powders and characterized with SEM-EDX, DSC, Laser Flash Analysis (LFA), electrical conductivity and Seebeck coefficient, dilatometry, Young's modulus, Vicker's hardness, 3-points flexural test. It shows unexpectedly low thermal expansion coefficient (from 3×10-6 to 17×10-6 K-1 between RT and 500 °C), high electrical resistivity and Seebeck coefficient and hardness comparable to the sintered blank Al 2 CoCrFeNi.

show abstract

Section: Resultsmentioning

confidence: 99%

A novel High-Entropy Alloy-based composite material

Riva

Tudball

Mehraban

et al. 2018

Journal of Alloys and Compounds

View full text Add to dashboard Cite

show abstract

“…"The pressed samples were sintered at 580 º C for 45 min to fabricate the final dense samples with 10 mm diameter" Recently, the fabrication of bulk Al-matrix composites with use of BN particles have strongly been considered due to their light weight (lower than pure Al), superior strength at room temperature even at low contents of BN as a reinforcement, and good thermal stability at elevated temperatures [1][2][3]. Consequently, these composites are good candidates for automotive and aerospace applications in comparison to the other Al matrix composite materials.…”

Section: Discussionmentioning

confidence: 99%

“…Hot extrusion and spark plasma sintering have been used successfully to fabricate Al/BN bulk samples from composite powders[1][2][3]8]. For instance, Firestein et al[1] synthesized Al/BN nanocomposite by the homogeneous mixing of composite powders and spark plasma sintering.In this study, the nanocomposite samples with 4.5 wt.% of BN nanoparticles showed 50% increase in the tensile strength compared with the pure Al as a reference sample. In the other study, Firestein et al[2] have fabricated in-situ nanocomposite by planetary ball milling to prepare Al/BN powder and then spark plasma sintering.…”

mentioning

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

View full text Add to dashboard Cite

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.%.

show abstract

“…It is a ceramic material applied in various areas including metallurgical and chemical engineering, aerospace, electrotechnology, high-temperature technology, because of its outstanding characteristics: very low density, chemical inertness, excellent lubrication properties, thermal shock resistance, high-temperature stability, easy workability, very high thermal conductivity and in terms of safety, non-toxic and good for the environment [10][11][12][13][14]. Lately, researchers have mentioned applaudable corrosion, tribological, mechanical and high-temperature properties of hexagonal boron nitride [11,[15][16][17][18][19][20]. Consequently, the nitride has been looked at as a promising reinforcement to recompense for the existing shortcomings of Ti6Al4V alloy with an added advantage of considerable weight savings.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, the nitride has been looked at as a promising reinforcement to recompense for the existing shortcomings of Ti6Al4V alloy with an added advantage of considerable weight savings. Sintering processing routes are commonly adopted to produce hexagonal boron nitride materials, but because of its unsatisfactory sinterability, sintering aids are often applied during processing to produce its dense products [10,15,18].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Properties of h-BN-Reinforced Titanium Alloy Matrix Composite Fabricated with Optimized Spark Plasma Sintering Parameters

Abe

Popoola

et al. 2021

Preprint

View full text Add to dashboard Cite

The effects of different combinations of spark plasma sintering parameters: temperature, pressure, heating rate and holding time, at three levels on the microstructure, densification, mechanical and wear properties of Ti6Al4V/h-BN binary composite were considered in this work. The design method of Taguchi and signal-to-noise (S/N) ratios analysis and main effects of the parameters were employed to randomize and optimize the levels of the SPS parameters. The microstructure and phase features of the samples sintered were analyzed by using a scanning electron microscope, an optical microscope and X-ray diffractometer respectively. Archimedes’ method, Vickers microhardness tester and a tribometer were used to evaluate the densification, microhardness and wear profiles of the samples. The most important parameter levels for optimum quality characteristics of the sintered composite were obtained at temperature, pressure, heating rate and holding time of 1000 °C, 30 MPa, 100 °C/min and 10 min, respectively. Ti6Al4V/h-BN composite approaching complete theoretical densification of 99.54%, microhardness value of 7.03 GPa, 1.66 GPa yield strength, 2.29 GPa ultimate tensile strength and wear rate of 8.075 x 10-6 mm3/Nm, respectively was produced with the optimized process parameters. The microhardness improved by approximately 216% and the wear rate improved by 97.8% of the Ti6Al4V alloy matrix. The improved microstructure, higher densification, mechanical and wear properties of the optimized composite were promoted by high sintering temperature and low heating rate which ensured adequate diffusional mass transport, achievement of refined grains, better pore filling and formation of solid matrix-reinforcement interfacial integrity.

show abstract

Fabrication, characterization, and mechanical properties of spark plasma sintered Al–BN nanoparticle composites

Cited by 92 publications

References 36 publications

A novel High-Entropy Alloy-based composite material

A novel High-Entropy Alloy-based composite material

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

Microstructure and Properties of h-BN-Reinforced Titanium Alloy Matrix Composite Fabricated with Optimized Spark Plasma Sintering Parameters

Contact Info

Product

Resources

About