Sintering behavior of Al–AlN-nanostructured composite powder synthesized by high-energy ball milling

Abdoli, Hamid; Asgharzadeh, H.; Salahi, E.

doi:10.1016/j.jallcom.2008.05.069

Cited by 59 publications

(34 citation statements)

References 30 publications

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“…6(a)). Abdoli et al 14) have obtained a crystallite size of 66 nm after a mechanical milling for 25 h of pure aluminum reinforced with AlN. Comparing this result with the one obtained in this work, it can be seen that similar refinement was reached with lower milling time.…”

Section: X-ray Diffractionsupporting

confidence: 86%

Synthesis of Graphite Reinforced Aluminum Nanocomposite by Mechanical Alloying

Martı́nez-Sánchez

2010

Mater. Trans.

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Aluminum nanocomposite was obtained through mechanical alloying process using elemental powders of aluminum, copper and magnesium of high purity with the aim to obtain the 2024 aluminum alloy composition. Elemental powders and reinforcement particles were milled in a simoloyer mill for different times from 1 to 5 h. X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) results indicated that even for milling time of 5 h some elemental copper remained in the microstructure and has not been incorporated completely in solid solution into the aluminum lattice. Furthermore, it was not observed formation of any second phase, however when the specimens were subjected to Differential Thermal Analysis (DTA), it was observed in the microstructure the presence of Al 2 Cu, Al 4 C 3 and some oxide of the type CuO and CuO 2 . It was also demonstrated that average crystallite size of milled powders was refined to nanometric level while microhardness values were arising continuously with the milling time and were a maximum in the 2 mass% graphite specimen.

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Section: X-ray Diffractionsupporting

confidence: 86%

Synthesis of Graphite Reinforced Aluminum Nanocomposite by Mechanical Alloying

Martı́nez-Sánchez

2010

Mater. Trans.

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“…Local deformation increases around the fine, brittle ceramic particles in the matrix powders during ball milling. On the other hand, the coarse brittle ceramic particles in the composite powder mixture act as milling elements, so the fragmentation tendency of milled powders increased [26]. However, ductile reinforcement particles, such as graphite and multilayer graphene have no effect on crack initiation (Fig.…”

Section: T Varol and A Canakcimentioning

confidence: 99%

Microstructure, electrical conductivity and hardness of multilayer graphene/Copper nanocomposites synthesized by flake powder metallurgy

2015

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In this study, the influence of multilayer graphene content on the green and sintered properties of the multilayer graphene/Copper nanocomposites was investigated. Flake powder metallurgy, as a new production method, was employed to prepare the multilayer graphene reinforced copper matrix nanocomposites. Results showed that the increase in agglomeration content inhibited particle-particle contact during the sintering process and therefore sintered density decreased with increasing the multilayer graphene content. The green density of 8.46 g/cm 3 was found for the monolithic Cu sample, which was 16.4% higher than that of the 5 wt% MLG/ Copper nanocomposites. The high conductivity value (78.5 IACs) was obtained with 0.5 wt% the multilayer graphene reinforced nanocomposites. The electrical conductivity of sintered 5 wt% the multilayer graphene/Copper nanocomposites was 61.48 IACs. When the amount of the multilayer graphene particles as higher than 3 wt%, the decreasing rate in hardness significantly increased. The decreasing rate in the hardness of the multilayer graphene/Copper nanocomposites can be attributed to decrease in density and the non-homogeneous distribution of multilayer graphene particulates in Cu matrix.

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“…Abdoli et al (2009) [41] performed the milling of Al-X wt % AlN (X = 0, 2.5, 5 and 10) composite powders in a planetary ball mill for 25 h. They found the sinterability was degraded when increasing the reinforcement content material. Due to a decrease in the compressibility and green density of the composite when increasing the amount of reinforcing material because this causes less metal-to-metal contact.…”

Section: Density Of Arquimedes (G/cm 3 )mentioning

confidence: 99%

A New Method to Recycle Stainless–Steel Duplex UNS S31803 Chips

Claudiney

Oliveira

Sachs

et al. 2018

Metals

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Due to the increased consumption of raw materials, energy, and the waste it generates, recycling has become very important and fundamental for the environment and the industrial sector. The production of duplex stainless-steel powders with the addition of vanadium carbide in the high energy mechanical milling process is a new method for recycling materials for the manufacture of components in the industrial sector. This study aims to reuse the chips from the duplex stainless-steel UNS S31803 by powder metallurgy with the addition of Vanadium carbide (VC). The mechanical milling was performed using a planetary ball mill for 50 h at a milling speed of 350 rpm and a ball-to-powder weight ratio of 20:1, and the addition of 3 wt % of VC. The material submitted to milling with an addition of carbide has a particle size of less than 140 µm. After milling, the sample went through a stress relief treatment performed at 1050 • C for 1 h and the isostatic compaction process loaded with 300 MPa. The sintered powders and material was characterized by scanning electron microscopy, X-ray diffraction, and micro-hardness tests. The milling process with an addition of 3% VC produced a particle size smaller than the initial chip size. The measurement of micrometric sizes obtained was between 26 and 132 µm. The sintered material had a measurement of porosity evaluated at 15%. The obtained density of the material was 84% compared to the initial density of the material as stainless-steel duplex UNS S31803. The value of the microhardness measurement was 232 HV. The material submitted for grinding presented the formation of a martensitic structure and after the thermal treatment, the presence of ferrite and austenite phases was observed. Thus, in conclusion, this study demonstrates the efficacy in the production of a metal-ceramic composite using a new method to recycle stainless-steel duplex UNS S31803 chips.

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Sintering behavior of Al–AlN-nanostructured composite powder synthesized by high-energy ball milling

Cited by 59 publications

References 30 publications

Synthesis of Graphite Reinforced Aluminum Nanocomposite by Mechanical Alloying

Synthesis of Graphite Reinforced Aluminum Nanocomposite by Mechanical Alloying

Microstructure, electrical conductivity and hardness of multilayer graphene/Copper nanocomposites synthesized by flake powder metallurgy

A New Method to Recycle Stainless–Steel Duplex UNS S31803 Chips

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