The Specific Heat Capacity and Oxidation Kinetics of NiAl, FeAl and TiAl Alloys

Piątkowski, J.; Przeliorz, R.; Jabłońska, Magda

doi:10.4028/www.scientific.net/ssp.203-204.431

Cited by 7 publications

(4 citation statements)

References 8 publications

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“…As mentioned above, a heat treatment is required for powders produced by MA. Considering that the heat treatment for this intermetallic compound is carried out at 650 °C (Mhadhbi et al 2013 ), the energy involved for the process to reach that temperature ( E Ht ) is computed as follows: where E Ht = energy for heat treatment, Cp = heat capacity = 0.51 kJ/kg °K (according to Piatkowski et al 2013 ), = temperature difference (between heat treatment and MA), m = mass considered, for this case, 1 ton.…”

Section: Resultsmentioning

confidence: 99%

Novel sustainable metallic powder production process with water used as milling medium

Salazar

Carreόn

Lagos

2021

Clean Techn Environ Policy

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Graphic abstract Today, Fe–Al intermetallic compounds are receiving a great interest from the mechanical, aerospace, and biomedical industries. A novel production process for Fe–Al intermetallic powders based on the generation of metallic tapes by rapid solidification and disintegration by water vapor was proposed. In this research work, a comparison is made between the energy required to manufacture of Fe–Al powder using the aforementioned process and one of the most commonly used manufacturing processes within the industry such as mechanical alloying. In addition, some other benefits of the proposed manufacturing process are analyzed. To carry out this comparison, the theoretical equations that take into account the most important variables involved during the process such as the type of material and hardness, the initial and final particle size, the grinding stages and the heating of the treatment powder were considered. In the case of calculating the energy required for the new proposed process, the two main stages were considered such as (1) the production of FeAl metal tape and (2) the subsequent transformation of the tape into powder by means of injection water vapor. For the first stage, the CASTRIP process is considered, and for the second stage, the energy required for the generation steam. Although the calculations may have certain limitations, it is obvious that the energy required to Fe–Al powder production using the new process is much lower than that required by mechanical alloying, resulting in at least three orders of magnitude lower (2.75 × 10 6 versus 2.206 × 10 9 kJ/ton). This lower energy implies considerable economic savings in the production process. On the other hand, when using water as a grinding medium during the process, it results in less environmental and acoustic pollution, less manipulation risks for humans and finally, no harmful agents or additives are used, making the proposed process sustainable.

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Section: Resultsmentioning

confidence: 99%

Novel sustainable metallic powder production process with water used as milling medium

Salazar

Carreόn

Lagos

2021

Clean Techn Environ Policy

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“…For the Fe 60 Al 40 /Si interfacial thermal conductance with G=9.410 7 W/(m 2 •K) is used 34 . As for the parameters of the Fe 60 Al 40 film, we assume that its thermal conductivity, density, and heat capacity are k=20 W/(m•K) 35 , =6.5 g/cm 3 36 , and C=0.7 37 , respectively.…”

Section: Methodsmentioning

confidence: 99%

Direct laser interference patterning of nonvolatile magnetic nanostructures in Fe60Al40 alloy via disorder-induced ferromagnetism

Graus

Möller

Leiderer

et al. 2020

Opto-Electronic Advances

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Current magnetic memories are based on writing and reading out the domains with opposite orientation of the magnetization vector. Alternatively, information can be encoded in regions with a different value of the saturation magnetization. The latter approach can be realized in principle with chemical order-disorder transitions in intermetallic alloys. Here, we study such transformations in a thin-film (35 nm) Fe 60 Al 40 alloy and demonstrate the formation of periodic magnetic nanostructures (PMNS) on its surface by direct laser interference patterning (DLIP). These PMNS are nonvolatile and detectable by magnetic force microscopy (MFM) at room temperature after DLIP with a single nanosecond pulse. We provide different arguments that the PMNS we observe originate from increasing magnetization in maxima of the interference pattern because of chemical disordering in the atomic lattice of the alloy at temperatures T higher than the critical temperature T c for the order (B2)disorder (A2) transition. Theoretically, our simulations of the temporal evolution of a partially ordered state at T>T c reveal that the disordering rate is significant even below the melting threshold. Experimentally, we find that the PMNS are erasable with standard thermal annealing at T

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“…= 2.852 10 6 / As mentioned above, a heat treatment is required for powders produced by MA. Considering that the heat treatment for this intermetallic compound is carried out at 650 °C (Mhadhbi et al2013), the energy involved for the process to reach that temperature (Eht) can be computed with the Cp = 0.51 kJ/kg °K according to (Piatkowski et al 2013) as follows:…”

Section: Required Energy For Mamentioning

confidence: 99%

Towards Sustainable and Environmentally Friendly Metallic Powder Production

Martínez

Lagos-Galván

2021

Preprint

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Intermetallic Fe-Al compounds have become very interesting materials due to their properties, such as good corrosion resistance, high-temperature resistance, high resistance/weight ratios, creep resistance, good wear resistance, and low cost, including some applications where they could replace stainless steels. However, their low ductility at room temperature has limited their use. One of the solutions is to generate powders of these intermetallics and press them in the wished form. Current production methods of this type of powders are very high energy-consuming, polluting, and harmful for handling for human beings. Because of the environmental situation in our planet, it is necessary to develop more environmentally friendly processes, which have lower energy requirements. Therefore, a comparison of a novel water vapor-based FeAl powder manufacture process with Mechanical Alloying (MA), one of the most commonly used processes to produce this type of powder is made in this work. This comparison aims to focus on the advantages of the novel process concerning MA, the last one, considering environmental as well as energy criteria.

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The Specific Heat Capacity and Oxidation Kinetics of NiAl, FeAl and TiAl Alloys

Cited by 7 publications

References 8 publications

Novel sustainable metallic powder production process with water used as milling medium

Novel sustainable metallic powder production process with water used as milling medium

Direct laser interference patterning of nonvolatile magnetic nanostructures in Fe60Al40 alloy via disorder-induced ferromagnetism

Towards Sustainable and Environmentally Friendly Metallic Powder Production

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