New method for preparing micron porous aluminium via powder metallurgy

Liu, Chao; Liu, Yang; Yang, Yuling; Ma, Yunzhu; Liu, Wensheng; Tang, Shibo; Liu, Bing; Cai, Qingshan

doi:10.1080/02670836.2018.1426677

Cited by 5 publications

(3 citation statements)

References 32 publications

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“…The study also demonstrated that vacuum sintering and the introduction of magnesium (Mg) positively influenced the sintering characteristics, leading to additional enhancements in the properties of the sintered samples. Based on the findings, the optimized sintering parameters for porous aluminum were determined as 650°C for temperature and 270 minutes for time [8]. Chouhan, T., Chouhan, H., & Soni, M. (2019), Examines the highstrain-rate compressive performance of aluminum produced through powder metallurgy.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Evaluation of Mechanical and Tribological Properties of Al-Foam Produced by Powder Metallurgy Route

Mohammed,

Hussein

2024

KEM

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In the present study, the production of aluminum foam was carried out using the powder metallurgy technique, specifically employing the sintering – dissolution process (SDP). The SDP method, which constitutes a sequential series of four well-defined steps, was employed to achieve the desired foam structure and properties. These steps involved carefully controlling the parameters and conditions throughout the process to ensure successful foam formation. Aluminum powder with a particle size of (1.99 μm) as a raw material was mixed with NaCl with a particle size between (150-425μm) used as a space holder at different ratio (25, 35, 45and 55 wt. %.). Obtained Al-foam with 45% NaCl demonstrated the most optimal structure. Some additives (Mg) added to the powder mixture, it was found that the mechanical and the tribological properties of the produced foam were improved. The introduction of metal’s micro-particles led to a notable enhancement in both compressive stress and micro-hardness, the compressive stress increased substantially from 15.2 MPa to 56.5 MPa for the foam containing 45% NaCl and 45% NaCl + Add., respectively. While the micro-hardness exhibited a noteworthy increase from 51.5 HV to 62.1 HV. Results also showed important reduction in the wear rate from (0.00000155 g/cm) to (0.00000079 g/cm) for the Al-samples of (45% NaCl) and (45% NaCl+ Additive) respectively, the lowest value recorded for the coefficient of friction was (0.15) for (Al-Foam with 45% NaCl + Additive) compare to (0.19) and (0.21) for (Al-foam with 45% NaCl) and (pure Al) respectively at 10 N applied load and 800 rpm.

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Section: Introductionmentioning

confidence: 99%

Fabrication and Evaluation of Mechanical and Tribological Properties of Al-Foam Produced by Powder Metallurgy Route

Mohammed,

Hussein

2024

KEM

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“…To prepare porosity gradient materials, precise control of pores is key. The precise control of pores in porous aluminium alloys is achieved using sodium chloride particles [32]. Rabiei et al [33] have used spheres with three sizes of outer diameters to manufacture close-cell composite metal foams, and the foam has excellent energy absorption.…”

Section: Introductionmentioning

confidence: 99%

“…Adjusting the proportion of metal/soluble powders and adding a soluble powder with an appropriate shape enable control of the pore structure. Also, porosity-graded materials prepared via SDP may be used in spacecraft shields because has no interfacial transition layer [31,32,35].…”

Section: Introductionmentioning

confidence: 99%

Novel approach for fabrication and characterisation of porosity-graded material

Liu

Liang

et al. 2019

Materials Science and Technology

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A novel continuously graded material that is based on a porosity-graded structure was successfully synthesised via a cold pressing-vacuum sintering-dissolution process (SDP) of powder metallurgy technology. Microscopic observations and the Archimedes method were used to confirm the newly synthesised porosity-graded material, the mechanical properties and the modulus. The results show that the density continuously increased from 1.4 to 2.7 g cm−3, and there was no obvious interfacial transition layer. In addition, the hardness and elastic modulus were obtained from nanoindentation tests and display a stepwise feature along the gradient direction. Moreover, we found that the fractography changes from typical ductile fracture to ductile and cleavage fracture with an increase in the porosity. Highlights A porosity graded material has been successfully synthesised by powder metallurgy. The density continuously transit from 1.4 to 2.7 g cm−3, and it has no obvious interfacial transition layer. The stepwise feature of density and modulus shows great potential in the shields of spacecrafts. GRAPHICAL ABSTRACT

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Effects of Heat Treatment on the Microstructure and Properties of Graded-Density Powder Aluminum Alloys

Liu

Wang

et al. 2022

Met Sci Heat Treat

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New method for preparing micron porous aluminium via powder metallurgy

Cited by 5 publications

References 32 publications

Fabrication and Evaluation of Mechanical and Tribological Properties of Al-Foam Produced by Powder Metallurgy Route

Fabrication and Evaluation of Mechanical and Tribological Properties of Al-Foam Produced by Powder Metallurgy Route

Novel approach for fabrication and characterisation of porosity-graded material

Effects of Heat Treatment on the Microstructure and Properties of Graded-Density Powder Aluminum Alloys

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