Obtaining NiAl intermetallic compound using different milling devices

Kubaski, Evaldo Toniolo; Cintho, Osvaldo Mitsuyuki; Antoniassi, Juliana Lívi; Kahn, Henrique; Capocchi, José Deodoro Trani

doi:10.1016/j.apt.2011.08.005

Cited by 14 publications

(5 citation statements)

References 36 publications

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“…As in the case of some materials like Ti, Ni, or Al, accumulation of milled powders on the milling container walls was found to be quite heavy [17,18], so it could be accepted as an alternative deposition method of coatings. Papers in this area published so far describe such a possibility as the formation of coatings by mechanical alloying [8,9,10,11,12], mechanical milling [13,19] or mechanical attrition treatment [20,21]. The first one is the most popular as it points toward tools used for their production, though it did not refer to the mechanism of coating deposition and, in the case of their formation from alloyed powders, it could be misleading (none of alloying processes are involved).…”

Section: Discussionmentioning

confidence: 99%

“…It results in the formation of numerous voids and a number of microstructure features starting from those solidified as amorphous, through fine crystalline, up to coarse crystalline ones. A newly emerging deposition method based on mechanical embedding (ME) of powder particles into metallic substrates during their mechanical milling seems to be fully capable of competing with the APS method with respect to the thickness of the deposited coatings [8,9,10,11,12,13,14]. In spite of the high surface roughness inherently connected with the mechanism of their build up, i.e., the local impact of rotating balls used in milling vials against substrate platelets, the ME coating’s microstructure should be much more uniform than those obtained with the APS method.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure of Coatings on Nickel and Steel Platelets Obtained by Co-Milling with NiAl and CrB2 Powders

et al. 2019

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Metal matrix composite coatings are developed to protect parts made from materials susceptible to wear, like nickel alloys or stainless steel. The industry-established deposition method is presently an atmospheric plasma spraying method since it allows the production of both well-adhering and thick coatings. Alternatively, similar coatings could be produced by co-milling of ceramic and alloyed powders together with metallic plates serving as substrates. It results in mechanical embedding of the powder particles into exposed metallic surfaces required coatings. The present experiment was aimed at the analysis of microstructure of such coatings obtained using NiAl and CrB2 powders. They were loaded together with nickel and stainless steel platelets into ball mill vials and rotated at 350 rpm for up to 32 h. This helped to produce coatings of a thickness up to ~40 µm. The optical, scanning, and transmission electron microscopy observations of the coatings led to conclusion that the higher the rotation speed of vials, the wider the intermixing zone between the coating and the substrate. Simultaneously, it was established that the total thickness of the coating deposited at specified conditions is limited by the brittleness of its nanocrystalline matrix. An increase in the hardness of the substrate results in a decrease of the intermixing zone. The above results indicate that even as the method based on mechanical embedding could so far produce thinner coatings than the plasma spraying, in the former case they are characterized by a more uniform nanocrystalline matrix with homogenously distributed fine ceramic particles.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure of Coatings on Nickel and Steel Platelets Obtained by Co-Milling with NiAl and CrB2 Powders

et al. 2019

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“…After that, fine refractory dispersoids are attained in the NiAl matrix, and the process is repeated to fabricate another composition in the same way [20]. Kubaski et al [21] fabricated the NiAl intermetallic by planetary ball mill. Here, the BPR ratio was maintained at 10:1, and stearic acid was used as a processing control agent to prevent cold welding during milling.…”

Section: Mechanical Alloyingmentioning

confidence: 99%

Nickel Aluminide intermetallic composites fabricated by various processing routes – a review

Azhagarsamy

Sekar

Murali

2022

Materials Science and Technology

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Nickel Aluminide intermetallic is a distinctive material for high-temperature applications with remarkable properties. This review article discusses the Nickel Aluminide intermetallic fabricated by various processing techniques like hot pressing, self-propagating high-temperature synthesis, spark plasma sintering, and additive manufacturing. Generally, Nickel Aluminide is blended mostly with chromium, molybdenum, and hafnium reinforcements. These elements increase the tensile property of the base alloy. Mechanical alloying produces nanoparticles with homogeneous distribution for attaining composites with better properties. Nickel Aluminide intermetallic has low ductility and fracture toughness. However, hot pressing improves the ductility and fracture toughness as sintering promotes strengthening mechanisms. In recent years, additive manufacturing has been preferred to build different intermetallic materials.

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Section: Introductionmentioning

confidence: 99%

“…Other authors have studied the synthesis of nanocrystalline grained NiAl through MA, suggesting that the formation was due to a mechanically induced self-propagating reaction or a continuous diffusive reaction between Ni an Al layers. [22][23][24][25] Mechanical alloying is also suitable for oxide dispersion strengthening and other composite materials. 26,27 Several consolidation methods have been carried out successfully for NiAl and other intermetallic alloys, from reactive sintering of different NiAl-matrix composites -where the effect of ternary element additions on the combustion synthesis has been studied -to the HIP process.…”

Section: Introductionmentioning

confidence: 99%

Mechanical alloying and field assisted hot pressing of nanocrystalline B2-NiAl intermetallic compound

et al. 2014

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Ordered B2-NiAl intermetallic compound powder was successfully synthesised by mechanical alloying after 20 h in an attritor mill, starting from elemental Ni and Al powders and without subsequent heat treatment. NiAl powder obtained was homogenous and had a nanocrystalline microstructure. It was consolidated by field assisted hot pressing (FAHP), in a novel configuration with a Gleeble 3800 thermomechanical simulator. The powder was also processed by hot isostatic pressing (HIP) in order to compare both methods. The consolidation was successful by both methods obtaining above 98% of NiAl theoretical density (5?86 g cm -3 ). The results showed that the consolidation process by FAHP technique is effective and uniform throughout the sample as indicated by homogenous hardness values, obtaining microstructure and properties similar to those obtained with HIP technique, with certain advantages over it. The achieved room temperature yield strength of 850 MPa and fracture strain 26-28% corresponds to the bulk values of NiAl intermetallic.

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Obtaining NiAl intermetallic compound using different milling devices

Cited by 14 publications

References 36 publications

Microstructure of Coatings on Nickel and Steel Platelets Obtained by Co-Milling with NiAl and CrB2 Powders

Microstructure of Coatings on Nickel and Steel Platelets Obtained by Co-Milling with NiAl and CrB2 Powders

Nickel Aluminide intermetallic composites fabricated by various processing routes – a review

Mechanical alloying and field assisted hot pressing of nanocrystalline B2-NiAl intermetallic compound

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