An investigation on the variations occurring during Ni3Al powder formation by mechanical alloying technique

Abbasi, M.H.; Sajjadi, Seyed Abdolkarim; Azadbeh, Maziyar

doi:10.1016/j.jallcom.2010.02.183

Cited by 16 publications

(7 citation statements)

References 17 publications

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“…What is already established is that the metallic powder necessary for the L-PBF should be as fine as possible, a uniform size, high density, without pores or inclusions and, if possible, of spherical shape, all to assure best concordance between designed geometry and as-built geometry [ 23 , 24 ]. Apparently, gas atomization and mechanical alloying could both be suitable for this purpose, but in terms of resource consuming (materials and energy) on the entire processing chain, mechanical alloying is reported to be quite efficient and a low-cost modality for producing metallic powders with the above characteristics [ 25 ]. In addition, it should be considered that due to repeated fracturing and cold welding of the particles caused by severe plastic deformation, mechanical alloying leads to a powder material with a nano-crystalline structure even if the powder shape is not so regular and spherical as it is with gas atomization [ 26 , 27 , 28 ].…”

Section: Methodsmentioning

confidence: 99%

Laser Powder Bed Fusion Applied to a New Biodegradable Mg-Zn-Zr-Ca Alloy

et al. 2022

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The aim of the present paper is to apply the laser powder bed fusion process to a new biodegradable Mg-Zn-Zr-Ca alloy powder prepared via a mechanical alloying method from powder pure components. This additive manufacturing method is expected to allow for the obtaining of high biomechanical and biochemical performance. Various processing parameters for laser powder bed fusion are tested, with a special focus on laser energy density—E [J/mm3]—which is calculated for all experiment variants, and which represents an important processing parameter, dependent upon all the rest. The goal of all the trials is to find the most efficient schema for the production of small biodegradable parts for the medical domain, meaning the selection of optimal processing parameters. An important observation is that the most robust and homogeneous samples without cracks are obtained for lower values of the E, around 100 J/mm3. Thus, the most performant samples are analyzed by scanning electron microscopy, X-ray diffraction and by compression mechanical test.

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Section: Methodsmentioning

confidence: 99%

Laser Powder Bed Fusion Applied to a New Biodegradable Mg-Zn-Zr-Ca Alloy

et al. 2022

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“…One of the more accessible and inexpensive methods is the mechanical alloying process (MA), which involves the milling of pure chemical element powders (≥99.00% purity). Even if there are research works that use the gas-atomization method to obtain powder for additive manufacturing processes, the present work wanted to demonstrate the fact that by using mechanical alloying, it is also possible to obtain an appropriate quality of samples processed through PBF-LB/ m. Using the mechanical alloying method, the obtained powder can attempt a nanocrystalline or even amorphous structure because the milling process implies a multitude of severe plastic deformations and provokes the repeated fracturing and cold welding of the component particles [51][52][53].…”

Section: Introductionmentioning

confidence: 99%

The Characterization of a Biodegradable Mg Alloy after Powder Bed Fusion with Laser Beam/Metal Processing for Custom Shaped Implants

Raducanu,

Cojocaru,

Nocivin

et al. 2024

Materials

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A new Mg-Zn-Zr-Ca alloy in a powder state, intended to be used for custom shaped implants, was obtained via a mechanical alloying method from pure elemental powder. Further, the obtained powder alloy was processed by a PBF-LB/M (powder bed fusion with laser beam/of metal) procedure to obtain additive manufactured samples for small biodegradable implants. A series of microstructural, mechanical and corrosion analyses were performed. The SEM (scanning electron microscopy) analysis of the powder alloy revealed a good dimensional homogeneity, with a uniform colour, no agglutination and almost rounded particles, suitable for the powder bed fusion procedure. Further, the PBF-LB/M samples revealed a robust and unbreakable morphology, with a suitable porosity (that can reproduce that of cortical bone) and without an undesirable balling effect. The tested Young’s modulus of the PBF-LB/M samples, which was 42 GPa, is close to that of cortical bone, 30 GPa. The corrosion tests that were performed in PBS (Phosphate-buffered saline) solution, with three different pH values, show that the corrosion parameters have a satisfactory evolution comparative to the commercial ZK 60 alloy.

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“…Most commercial Mg alloys contain Al, which is known to induce neurotoxicity [17], and rare earth elements, which cause severe hepatotoxicity [18]. Mg-Zn-Ca alloys were formed using machine-driven alloying (MA) given the it is an efficient way to yield alloys with a fine microstructure, which promotes greater mechanical properties [19,20], MA is an exclusive solid-state reaction process that happens between the surfaces of fine particles at room temperature; consequently, MA can be used to create alloys difficult or impossible to obtain using conventional systems. Thus, the MA method has inspired numerous investigations.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Magnesium-Based Alloys by Mechanical Alloying for Implant Applications

et al. 2023

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The biocompatibility and biodegradability of magnesium (Mg), along with its lightness, make magnesium-based materials promising for use in the biomedical industry. In this work, ternary Mg–Zn–Ca alloys were manufactured for biomedical applications using mechanical alloying (MA). The objective of this work was to study the effect of milling time on the produced ternary alloys Mg65–Zn30–Ca5 and Mg70–Zn25–Ca5 (percentages by weight), the degradation of the alloys in synthetic human fluids, and their generated cytotoxicity. The Mg-based alloys were synthesized in a planetary ball mill under an argon atmosphere using stainless-steel containers and balls with a milling regimen of 400 rpm for 2, 5, 10, 15, and 20 h. The powders obtained after MA were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), which verified that ternary Mg–Zn–Ca alloys can be obtained using MA. The XRD refinement analysis of the samples showed the presence of a MgZn intermetallic phase. Electrochemical tests showed that the corrosion resistance and corrosion current density of Mg65–Zn30–Ca5 and Mg70–Zn25–Ca5 alloys improved compared to those of pure Mg. Cytotoxicity testing was conducted using the Sulforhodamine B (SRB) assay, which revealed that the alloys did not exhibit cytotoxicity toward human fibroblast cells. Mg65–Zn30–Ca5 and Mg70–Zn25–Ca5 alloys show good potential to be used in biomedical applications.

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An investigation on the variations occurring during Ni3Al powder formation by mechanical alloying technique

Cited by 16 publications

References 17 publications

Laser Powder Bed Fusion Applied to a New Biodegradable Mg-Zn-Zr-Ca Alloy

Laser Powder Bed Fusion Applied to a New Biodegradable Mg-Zn-Zr-Ca Alloy

The Characterization of a Biodegradable Mg Alloy after Powder Bed Fusion with Laser Beam/Metal Processing for Custom Shaped Implants

Synthesis of Magnesium-Based Alloys by Mechanical Alloying for Implant Applications

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