Preliminary development of porous aluminum via powder metallurgy technique

Jamal, Nur Ayuni; Maizatul, O.; Anuar, Hazleen; Yusof, Farazila; Nor, Yusilawati Ahmad; Khalid, Khalisanni; Zakaria, M. N.

doi:10.1002/mawe.201700269

Cited by 8 publications

(3 citation statements)

References 11 publications

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“…Сазегаран (Sazegaran) изучил влияние количества хрома на плотность неспеченных и спеченных изделий. При добавлении хрома в исходный порошок первоначально плотность уменьшалась, но после добавления дополнительного количества плотность неспеченного и спеченного материала увеличивалась [39,40].…”

Section: опрессовывание наполнителяunclassified

A systematic review of processing techniques for cellular metallic foam production

Sharma,

Joshi,

Rajpoot

2023

Metal Working and Material Science

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Introduction. The paper presents a comprehensive overview of the manufacturing methods, materials, properties, and challenges associated with cellular metallic foams, primarily focusing on aluminum and titanium-based foams. Cellular metallic foams are gaining interest due to its unique combination of low density, high stiffness, and enhanced energy absorption capabilities. Cellular metallic foam is renowned for its special combinations of physical and mechanical characteristics, containing their increased stiffness, specific strength at high temperatures, light weight, and good energy absorption at relatively low plateau stress. It has extensive uses in the automotive, shipbuilding and space industries. It has high porosity, low relative density and high strength, which increases performance of the product. The aerospace and automotive industries require a material with a high strength-to-weight ratio. Methods. To meet this need, many metal foam production methods have been developed, such as melt route method, deposition method and powder metallurgy method. Melt route method is widely used to manufacture metallic foam as compared to other methods. Results and Discussion. In the production of aluminum foams, the melt route method is usually used. Titanium hydride (TiH2) has been a popular foaming agent, but its high decomposition rate and cost limitations have led to the development of alternative foaming agents, such as CaCO3 (calcium carbonate). Titanium foam is often manufactured using the space holder method. This method involves mixing titanium powder with a space holder material, forming a preform, and then sintering to remove the space holder and produce a porous structure as the space holder method allows for precise control over the properties of the foam, including pore size, porosity, and relative density. Results also indicate that porosity in cellular metallic foams can range from 50 % to 95 %, as reported in various journals. Pore structures can include mixed types, open cells, and closed cells, each offering different mechanical and thermal properties. It is also observed from various literature sources that relative density, which is the ratio of the foam's density to the bulk material's density, varies from 0.02 to 0.44 based on the production method used.

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Section: опрессовывание наполнителяunclassified

A systematic review of processing techniques for cellular metallic foam production

Sharma,

Joshi,

Rajpoot

2023

Metal Working and Material Science

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“…These space holders can be polymeric materials, or salts, such as NaCl particles [ 133 , 134 , 135 , 136 , 137 , 138 ], K 2 CO 3 [ 69 ], carbamide particles [ 60 , 139 ], carbohydrate particles [ 140 ], polymethylmethacrylate (PMMA), etc. [ 141 ]. Approximately 1 to 2% binders are added to increase the strength of the final part.…”

Section: Fabrication Techniques Of Metal Foamsmentioning

confidence: 99%

Microstructure and Mechanical Properties of Metal Foams Fabricated via Melt Foaming and Powder Metallurgy Technique: A Review

et al. 2022

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Metal foams possess remarkable properties, such as lightweight, high compressive strength, lower specific weight, high stiffness, and high energy absorption. These properties make them highly desirable for many engineering applications, including lightweight materials, energy-absorption devices for aerospace and automotive industries, etc. For such potential applications, it is essential to understand the mechanical behaviour of these foams. Producing metal foams is a highly challenging task due to the coexistence of solid, liquid, and gaseous phases at different temperatures. Although numerous techniques are available for producing metal foams, fabricating foamed metal still suffers from imperfections and inconsistencies. Thus, a good understanding of various processing techniques and properties of the resulting foams is essential to improve the foam quality. This review discussed the types of metal foams available in the market and their properties, providing an overview of the production techniques involved and the contribution of metal foams to various applications. This review also discussed the challenges in foam fabrications and proposed several solutions to address these problems.

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“…However, there are some issues associated with them; some are toxic, while others do not completely leach out during the leaching process. Researchers have recently replaced them with PMMA particles due to their spherical shape, excellent formability and complete decomposition at a lower temperature range of 360 to 400 • C, leaving nearly zero residue behind [38,39]. Additionally, their spherical shape allows for control over the pore shape and pore size in the resultant porous composites, but there are inadequate reports on the porous composites fabricated using PMMA as space holders and using the powder metallurgy method [40,41].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Strengthening Effect of Coated Diamond Particles on the Porous Aluminum Composites

et al. 2023

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In this work, porous Al alloy-based composites with varying Ti-coated diamond contents (0, 4, 6, 12 and 15 wt.%) were prepared, employing the powder metallurgy route and using a fixed amount (25 wt.%) of polymethylmethacrylate (PMMA) as a space holder. The effects of the varying wt.% of diamond particles on the microstructure, porosities, densities and compressive behaviors were systematically evaluated. The microstructure study revealed that the porous composites exhibited a well-defined and uniform porous structure with good interfacial bonding between the Al alloy matrix and diamond particles. The porosities ranged from 18% to 35%, with an increase in the diamond content. The maximum value of plateau stress of 31.51 MPa and an energy absorption capacity of 7.46 MJ/m3 were acquired for a composite with 12 wt.% of Ti-coated diamond content; beyond this wt.%, the properties declined. Thus, the presence of diamond particles, especially in the cell walls of porous composites, strengthened their cell walls and improved their compressive properties.

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Preliminary development of porous aluminum via powder metallurgy technique

Cited by 8 publications

References 11 publications

A systematic review of processing techniques for cellular metallic foam production

A systematic review of processing techniques for cellular metallic foam production

Microstructure and Mechanical Properties of Metal Foams Fabricated via Melt Foaming and Powder Metallurgy Technique: A Review

Microstructure and Strengthening Effect of Coated Diamond Particles on the Porous Aluminum Composites

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