Review on Powder Metallurgy: a Novel Technique for Recycling and Foaming of Aluminium-Based Materials

Kumar, Naveen; Bharti, Ajaya

doi:10.1007/s11106-021-00214-4

Cited by 18 publications

(5 citation statements)

References 22 publications

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“…Porous, semi-dense, or completely dense materials can effectively convey through powder metallurgy. Because of the benefits of powder metallurgy innovation, it has become a way to tackle the issue of new materials and assumes a conclusive part in growing new materials [27]. Powder metallurgy has the following advantages:…”

Section: Powder Metallurgymentioning

confidence: 99%

Mechanical and Biological Properties of Titanium and Its Alloys for Oral Implant with Preparation Techniques: A Review

Wu,

Chen,

Kong

et al. 2023

Materials

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Dental implants have revolutionised restorative dentistry, offering patients a natural-looking and durable solution to replace missing or severely damaged teeth. Titanium and its alloys have emerged as the gold standard among the various materials available due to their exceptional properties. One of the critical advantages of titanium and its alloys is their remarkable biocompatibility which ensures minimal adverse reactions within the human body. Furthermore, they exhibit outstanding corrosion resistance ensuring the longevity of the implant. Their mechanical properties, including hardness, tensile strength, yield strength, and fatigue strength, align perfectly with the demanding requirements of dental implants, guaranteeing the restoration’s functionality and durability. This narrative review aims to provide a comprehensive understanding of the manufacturing techniques employed for titanium and its alloy dental implants while shedding light on their intrinsic properties. It also presents crucial proof-of-concept examples, offering tangible evidence of these materials’ effectiveness in clinical applications. However, despite their numerous advantages, certain limitations still exist necessitating ongoing research and development efforts. This review will briefly touch upon these restrictions and explore the evolving trends likely to shape the future of titanium and its alloy dental implants.

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Section: Powder Metallurgymentioning

confidence: 99%

Mechanical and Biological Properties of Titanium and Its Alloys for Oral Implant with Preparation Techniques: A Review

Wu,

Chen,

Kong

et al. 2023

Materials

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“…Inspired by nature, human beings fabricated a series of porous materials [1][2][3][4][5][6][7]. Porous metal has excellent mechanical and physical properties, such as low density, high specific strength, and good sound absorption [8][9][10][11][12][13][14][15][16][17]. Aluminum foams have become the most popular and widely studied porous metal because of their low cost, unique properties, easiness of fabrication, and rich reserves [18,19].…”

Section: Introductionmentioning

confidence: 99%

Fabrication, Processing, Properties, and Applications of Closed-Cell Aluminum Foams: A Review

Fu,

2024

Materials

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Closed-cell aluminum foams have many excellent properties, such as low density, high specific strength, great energy absorption, good sound absorption, electromagnetic shielding, heat and flame insulation, etc. As a new kind of material, closed-cell aluminum foams have been used in lightweight structures, traffic collision protections, sound absorption walls, building decorations, and many other places. In this paper, the recent progress of closed-cell aluminum foams, on fabrication techniques, including the melt foaming method, gas injection foaming method, and powder metallurgy foaming method, and on processing techniques, including powder metallurgy foaming process, two-step foaming process, cast foaming process, gas injection foaming process, mold pressing process, and integral foaming process, are summarized. Properties and applications of closed-cell aluminum foams are discussed based on the mechanical properties and physical properties separately. Special focuses are made on the newly developed cast-forming process for complex 3D parts and the improvement of mechanical properties by the development of small pore size foam fabrication and modification of cell wall microstructures.

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“…Aluminium alloys are often produced by traditional casting and finished with the manufacturing process. This production results in enormous aluminium chip waste [8,9]. Traditional methods of recycling aluminium alloy machining waste by remelting lead to the intensive oxidation of small metal scraps, such as chips and filings, with a high area-to-volume ratio, which results in high metal losses during remelting, even up to 40% [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behaviour of Recycled Aluminium AlSi9Cu3(Fe) Machining Chips by Hot Extrusion and Thixoforming

Gudić,

Vrsalović,

Krolo

et al. 2024

Sustainability

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The corrosion properties of an EN AC AlSi9Cu3(Fe) alloy (reference sample (RS)) and samples produced by recycling chips of RS by direct hot extrusion (DHES) and subsequent thixoforming (TFS) were tested in 0.5 M NaCl solution. The plastic deformation changes the microstructure of RS, and brittle, coarse Si particles and intermetallic compounds (IMCs) were effectively broken into ultrafine-grained particles and redistributed homogeneously into the α-Al matrix in DHES. TFS exhibits a globular structure, and polyhedral clusters rich in Si and IMCs were observed along the grain boundary. Electrochemical measurements combined with surface characterisation show that the microstructure significantly influences the tested samples’ corrosive properties. It was confirmed that corrosion resistance increased in the following order: RS < TFS < DHES. Similarly, the corrosion potential becomes nobler, the corrosion current decreases, the passive area increases, and the oxide layer becomes more stable (higher resistance and thickness). Also, the percentage of the surface affected by corrosion and the volume of pits reduce. The effect of microstructure is particularly pronounced in the level of the corrosion current and the volume of pits formed. The corrosion current of DHES and TFS decreases by 4–5 times, while the pit volume of DHES and TFS decreases by several orders of magnitude compared to RS. The corrosion stability of DHES and TFS in relation to RS is a consequence of the comminution of the Si particles and the IMC. The refined and homogeneous microstructure contributes positively to forming a stable oxide film on DHES and TFS and increases their corrosion resistance in an aggressive environment. The applied recycling method represents an innovative and sustainable process for the recycling of semisolid materials, with lower energy consumption and less greenhouse gas emissions compared to conventional recycling. The fact that the products obtained through recycling have a significantly higher corrosion resistance further increases the economic and environmental impact of the process.

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Review on Powder Metallurgy: a Novel Technique for Recycling and Foaming of Aluminium-Based Materials

Cited by 18 publications

References 22 publications

Mechanical and Biological Properties of Titanium and Its Alloys for Oral Implant with Preparation Techniques: A Review

Mechanical and Biological Properties of Titanium and Its Alloys for Oral Implant with Preparation Techniques: A Review

Fabrication, Processing, Properties, and Applications of Closed-Cell Aluminum Foams: A Review

Corrosion Behaviour of Recycled Aluminium AlSi9Cu3(Fe) Machining Chips by Hot Extrusion and Thixoforming

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