Understanding and improving powder metallurgical processes

Lemoisson, Fabienne; Froyen, Ludo

doi:10.1533/9781845690946.2.471

Cited by 21 publications

(18 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This is because solid-state sintering by Mg could cause the pores to shrink and collapse. Consequently, the pores became spherical and isolated [41]. These effects led to the reduction of pore volume in the PAC-Mg sample.…”

Section: Resultsmentioning

confidence: 98%

“…The PAC-KOH and PAC-ZnCl 2 samples used the mixing method in the solution, which was indirect precipitation. This indirect precipitation from the salt solution caused the activating agents to diffuse into the inside of the non-activated PC structure [41]. This, in turn, resulted in a good agent distribution and an increase of the contact area between the non-activated PC and activating agents in the activation process.…”

Section: Resultsmentioning

confidence: 99%

“…The increase of the contact area contributed to more activation and higher surface areas in PAC samples. Meanwhile, the PAC-FeCl 3 and PAC-Mg samples used the solid-state mixing method, the distribution of which depends on the particle sizes of activating agents [41]. From this limitation, the contacting area (between the non-activated PC and activating agents) in the solid-state mixing is lower than in the solution mixing.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Natural Porous Carbon Derived from Popped Rice as Anode Materials for Lithium-Ion Batteries

et al. 2022

View full text Add to dashboard Cite

Popped rice carbons (PC) were derived from popped rice by using a facile and low-cost technique. PC was then activated by different kinds of activating agents, such as potassium hydroxide (KOH), zinc chloride (ZnCl2), iron (III) chloride (FeCl3), and magnesium (Mg), in order to increase the number of pores and specific surface area. The phase formation of porous activated carbon (PAC) products after the activation process suggested that all samples showed mainly graphitic, amorphous carbon, or nanocrystalline graphitic carbon. Microstructure observations showed the interconnected macropore in all samples. Moreover, additional micropores and mesopores were also found in all PAC products. The PAC, which was activated by KOH (PAC-KOH), possessed the largest surface area and pore volume. This contributed to excellent electrochemical performance, as evidenced by the highest capacity value (383 mAh g−1 for 150 cycles at a current density of 100 mA g−1). In addition, the preparation used in this work was very simple and cost-effective, as compared to the graphite preparation. Experimental results demonstrated that the PAC architectures from natural popped rice, which were activated by an optimal agent, are promising materials for use as anodes in LIBs.

show abstract

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Natural Porous Carbon Derived from Popped Rice as Anode Materials for Lithium-Ion Batteries

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The relative densities of the sintered test specimens are shown in Table 2. During compacting, the pressure applied to the powder material results in the rearrangement of the particles, deformation, and the hardening of the material to form a solid model (Lemoisson and Froyen, 2005;Križan et al, 2016). In the compacting curve of ceramics and metals, there is a steep increase at first in density and then a slower increase followed by a plateau in density (Francis, 2016).…”

Section: Density and Porositymentioning

confidence: 99%

Caracterización de CP-Titanio producido mediante inyección aglutinante y pulvimetalurgia convencional

İyibilgin

Gepek

2021

revmetal

View full text Add to dashboard Cite

El titanio (Ti) y sus aleaciones se encuentran entre los materiales más utilizados en aplicaciones biomédicas. Además de ser biocompatibles, estos materiales tienen una baja densidad, una alta resistencia a la corrosión y unas propiedades mecánicas notables. Es muy difícil producir piezas con geometría compleja utilizando métodos convencionales de pulvimetalurgia (PM) ya que este método se basa en dar forma a polvos bajo fuerzas uniaxiales utilizando moldes. La Inyección Aglutinante (Binder Jetting) es un tipo de técnica de fabricación aditiva que no necesita moldes para dar forma a los polvos. Este estudio se centra en comparar las propiedades de las piezas porosas de CP-Ti producidas con PM e Inyección Aglutinante. Las piezas se sinterizaron durante 120 min en una atmósfera de argón a 1200 °C. Después de la sinterización, se alcanzaron valores de densidad relativa de aproximadamente el 94% y el 92% en las muestras producidas por PM y con la impresora 3D, respectivamente. También se observó que la muestra producida con una presión de compactación de 25 MPa tiene una dureza de 317 ± 10 HV0.05 y un límite elástico bajo compresión de 928 MPa, mientras que la pieza producida con la impresora 3D tiene una dureza de 238 ± 8 HV0. 05 y un límite elástico bajo compresión de 342 MPa. Aunque la dureza y resistencia de las muestras producidas con la impresora 3D fueron menores que las de PM, sus propiedades son adecuadas para producir implantes que reemplacen las estructuras óseas.

show abstract

“…Basing on this principle, compaction process is achieved by applying pressure on the particles to compose cohesion among them. This is usually termed as the green strength [62,63]. It is interesting to discuss that the compaction process effectively promote the followings [64]:…”

Section: Powder Compactionmentioning

confidence: 99%

Review on Using Powder Metallurgy Method for Production of Metal-Based Nanocomposites

Hakam

Taha

2021

Egypt. J. Chem.

View full text Add to dashboard Cite

Due to the constant need for metal matrix nanocomposites (MMNCs), which are used in industrial applications such as automotive, aerospace, and many others, and therefore many researchers, are interested in making them nanocomposites with better performance, studies are continuing to improve their properties. In contrast to other versatile conventional production methods, powder metallurgy (PM) method is highly effective in eliminating porosity, wetting and casting defects. In this review, an in-depth discussion of the different MMNCs fabricated by the PM method with an explanation of the different stages of preparation of these nanocomposites such as powder production, pressing and sintering was discussed. Also, the different factors affecting milling and sintering processes were reviewed. Finally, the advantages, disadvantages, and more common applications of PM in the preparation of these nanocomposites mentioned above were discussed in some detail.

show abstract

Understanding and improving powder metallurgical processes

Cited by 21 publications

References 15 publications

Natural Porous Carbon Derived from Popped Rice as Anode Materials for Lithium-Ion Batteries

Natural Porous Carbon Derived from Popped Rice as Anode Materials for Lithium-Ion Batteries

Caracterización de CP-Titanio producido mediante inyección aglutinante y pulvimetalurgia convencional

Review on Using Powder Metallurgy Method for Production of Metal-Based Nanocomposites

Contact Info

Product

Resources

About