Recycling of silica fume waste in the manufacture of β-eucryptite ceramics

Khattab, R.M.; Sadek, H.E.H.; Taha, Mohammed A.; EL-Rafei, Amira M.

doi:10.1016/j.matchar.2020.110740

Cited by 19 publications

(3 citation statements)

References 54 publications

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“…The bulk density of the prepared composites was measured by Archimedes method according to ASTM: B962-08. As described in our recent work [31][32][33], the microhardness of all investigated samples was measured according to ASTM: B933-09 using 1.96 N loads under dwell time of 10 s according to Eq. (1) [34,35]:…”

Section: Methodsmentioning

confidence: 99%

Study of mechanical properties and wear behavior of nano-ZrO2-hardened Al2024 matrix composites prepared by stir cast method

Taha¹,

Hakam

2021

Egypt. J. Chem.

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The Al2024 matrix composites reinforced by different weight percentages of nano-ZrO2 particles were prepared by stir-cast method. Physical and mechanical properties (microhardness, compressive test and elastic moduli) of the prepared composites samples were measured. Moreover, the effect of sliding distance and applied load on the wear behavior of all prepared samples was studied. The results showed that the relative density of the Al2024 matrix decreased with the increase ZrO2 nanoparticles content while the apparent porosity increased. Moreover, the microhardness, ultimate strength and Young's modulus of the composites were improved with increasing of ZrO2 content except fracture strain that reduced significantly. The wear rate decreased as the reinforcement content increased while it increased with the increase of the sliding distance and applied load. The microhardness, ultimate strength, bulk modulus of the composites containing 10 wt.% ZrO2 sample improved to approximately 31, 60 and 49%, respectively. For the same sample, the wear rate improved around 20.2 and 21.3 under applied loads 10 and 40 N, respectively.

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Section: Methodsmentioning

confidence: 99%

Study of mechanical properties and wear behavior of nano-ZrO2-hardened Al2024 matrix composites prepared by stir cast method

Taha¹,

Hakam

2021

Egypt. J. Chem.

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“…Due to the presence of system charge carriers, which acquire energy and hop from one conductive site to another, the observed reduction in the ρ AC with increased frequency for all samples is the consequence of this. 50 At any given frequency, a tremendous increase in ρ AC occurs with increasing NDMG content. This can be attributed to the increase in crosslink density as well as chain scission and may be due to the ability of NDMG to prevent moisture absorption in the cotton fiber.…”

Section: Electrical Propertiesmentioning

confidence: 96%

Preparation of multifunctional flame-retardant coating of cotton fabrics for electrical Insulating applications

Abdelkhalik,

Makhlouf,

Ameen

et al. 2023

Journal of Thermoplastic Composite Materials

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Cotton fabric (CF) was coated with a new multifunctional flame-retardant system consisting of melamine phosphate (MP) and nickel (II) dimethylglyoxime (NDMG). The new coating was applied to enhance the flame retardancy, antibacterial activity, thermal stability, color strength, UV protection, and electrical properties of CF. The weight percentages of NDMG and MP that led to the maximum improvement in CF properties were identified. According to vertical and horizontal flammability tests, coating the fabric with 29%MP/1%NDMG prevented flame propagation in the samples. Moreover, it increased the limiting oxygen index (LOI) of CF from 17.9% to 36.9%. Thermogravimetric analysis (TGA) data presented that the MP/NDMG coating enhanced the char residue at 750°C. Antimicrobial investigations indicated that the coating 29%MP/1%NDMG reduced the growth of S. aureus and E. coli bacteria. UV shielding and color strength (K/S) results revealed that coated fabrics had excellent UV protection (UPF > 175) and enhanced K/S values. The tensile strength of CF was slightly decreased after the coating process. The dielectric constant (ε`), the dielectric loss (ε``), and AC electrical resistivity ([Formula: see text]) with frequency (10-106 Hz) were also investigated. The electrical resistivity increased significantly after adding MP and NDMG to the CFs. The coated sample (23%MP/7%NDMG) showed the best dielectric properties, with a low dielectric constant of 2.6 and [Formula: see text] of 1.40E+10 Ω.cm at 1000 Hz.

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“…Before the sintering process, the compacted powder possesses very low green strength. Both the nature and the strength of the bond between the particles are strongly influenced by the mechanism of diffusion and plastic flow of the powder particles, and evaporation of volatile material from the compacted preform [65][66][67][68].…”

Section: Sintering Of the Compacted Powdermentioning

confidence: 99%

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

Hakam

Taha

2021

Egypt. J. Chem.

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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.

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Recycling of silica fume waste in the manufacture of β-eucryptite ceramics

Cited by 19 publications

References 54 publications

Study of mechanical properties and wear behavior of nano-ZrO2-hardened Al2024 matrix composites prepared by stir cast method

Study of mechanical properties and wear behavior of nano-ZrO2-hardened Al2024 matrix composites prepared by stir cast method

Preparation of multifunctional flame-retardant coating of cotton fabrics for electrical Insulating applications

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

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