Microstructural characterisation and corrosion behaviour of microwave-sintered magnesium alloy AZ61/fly ash microspheres syntactic foams

Akinwekomi, Akeem Damilola

doi:10.1016/j.heliyon.2019.e01531

Cited by 25 publications

(12 citation statements)

References 28 publications

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“…Furthermore, the sintering process is carried out to convert the compact green specimen into a helpful test specimen [ 32 – 34 ]. The samples are sintered for different time periods such as 3, 4, 5, and 6 h maintaining 4°C.…”

Section: Methodsmentioning

confidence: 99%

[Retracted] Evaluation of MWCNT Particles‐Reinforced Magnesium Composite for Mechanical and Catalytic Applications

Sathish

Mohanavel

Velmurugan

et al. 2022

Bioinorganic Chemistry and Applications

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Aluminum, magnesium, and copper materials must have increased mechanical strength with enhanced wear and corrosion resistance. Substantial research focused on reinforcing hard particles into low-strength materials using stir casting or powder metallurgy. This work is intended to develop the magnesium hybrid matrix with the dispersion of boron carbide (B4C) and multiwall carbon nanotubes (MWCNTs). Hybrid magnesium composites are prepared, although the powder metallurgy route considers different process parameters. Statistical analysis such as Taguchi L16 orthogonal array is involved in this work. It is used to find the magnesium hybrid samples’ minimum and maximum wear, corrosion, and microhardness levels. Powder metallurgy parameters are B4C (3%, 6%, 9%, and 12%), MWCNT (0.2%, 0.4%, 0.6%, and 0.8%), ball milling (1, 2, 3, and 4 h), and sintering (3, 4, 5, and 6 h). The ball milling parameters are extremely influenced in the wear test analysis. Minimum wear losses are obtained as 0.008 g by influencing the 4 h ball milling process. Similarly, 3 h of sintering time offered a minimum corrosion rate of 0.00078 mm/yr. In microhardness analysis, the percentage of MWCNTs is highly implicated in narrow hardness resulting in the hardness value of 181. The hardness value is recorded using 0.2% MWCNTs in the magnesium alloy AZ80.

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Section: Methodsmentioning

confidence: 99%

[Retracted] Evaluation of MWCNT Particles‐Reinforced Magnesium Composite for Mechanical and Catalytic Applications

Sathish

Mohanavel

Velmurugan

et al. 2022

Bioinorganic Chemistry and Applications

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“…Cenosphere reinforced Mg composites fabricated by DMD technique also showed similar characteristics [41]. Corrosion behavior of powder metallurgy processed AZ61 alloy based composites reinforced with fly ash microspheres (100-250 µm) was tested in 3 wt.% sodium chloride solution and the results revealed better corrosion resistance in composites (Table 19) due to minimal galvanic interaction and reduced surface area of the material exposed to the corrosion medium [42].…”

Section: Fly Ash Reinforced Mg Matrix Compositesmentioning

confidence: 67%

“…Density and corrosion properties of AZ61 alloy based composites reinforced with fly ash microspheres[42].…”

mentioning

confidence: 99%

Mechanical Properties of Sustainable Metal Matrix Composites: A Review on the Role of Green Reinforcements and Processing Methods

et al. 2022

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Growing concerns like depleting mineral resources, increased materials wastage, and structural light-weighting requirements due to emission control regulations drive the development of sustainable metal matrix composites. Al and Mg based alloys with relatively lower melting temperatures qualify for recycling applications and hence are considered as the matrix material for developing sustainable composites. The recent trend also explores various industrial by-products and agricultural wastes as green reinforcements, and this article presents insights on the properties of Al and Mg based sustainable metal matrix composites with special emphasis on green reinforcements and processing methods.

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“…With increasing sintering temperature, the compressive strength of the Al 2 O 3hs /AZ91D syntactic foam gradually increased. The maximum value was 167 MPa for Al 2 O 3hs /AZ91D sintered at 693 K. With a further increase in the sintering temperature, the compressive strength of the Al 2 O 3hs /AZ91D syntactic foam decreased gradually to 97 MPa for Al 2 O 3hs /AZ91D sintered at 753 K. According to the XRD pattern in Figure 6 , many brittle MgAl 2 O 4 phases formed at 723 and 753 K. Under loading, the brittle phase was the first to break, which led to a decrease in the quasistatic compressive strength of the Al 2 O 3hs /AZ91D syntactic foam prepared at 723 and 753 K. Compared with the data in the literature [ 4 , 6 , 25 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 ], the performance of the present Al 2 O 3hs /AZ91D syntactic foam is much better.…”

Section: Resultsmentioning

confidence: 88%

Compression Properties and Fabrication of Closed-Cell Metal Matrix Syntactic Foams Al2O3hs/AZ91D

Yang

Tang

et al. 2022

Materials

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Closed-cell metal syntactic foam is a new material consisting of hollow spheres embedded in metal matrix syntactic foams. These foams have good physical and mechanical properties and are increasingly used worldwide in industrial and high-tech fields. Magnesium matrix syntactic foams containing hollow Al2O3 spheres ((Al2O3hs)/AZ91D) were successfully fabricated by hot press sintering at different temperatures. The fabrication of Al2O3hs/AZ91D and the effect of sintering temperature on the microstructure and properties are reported in this paper. Additionally, sandwiched magnesium matrix syntactic foams were prepared by placing magnesium plates on both sides of the syntactic foam. Some Al2O3hs particles became filled with matrix particles during preparation. Thus, the actual density was greater than the theoretically calculated value and increases with increasing sintering temperature. Above 723 K, a brittle phase MgAl2O4 formed in Al2O3hs/AZ91D. The quasistatic and dynamic compressive strengths of Al2O3hs/AZ91D first increased and then decreased with increasing sintering temperature, and the maximums were 162 MPa and 167.87 MPa, respectively. Thus, this paper reports a new strategy for the controlled preparation of metal matrix syntactic foams with predetermined porosity. The results show that this strategy improved the performance of lightweight and high-strength syntactic foam materials and shows potential for further research.

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Microstructural characterisation and corrosion behaviour of microwave-sintered magnesium alloy AZ61/fly ash microspheres syntactic foams

Cited by 25 publications

References 28 publications

[Retracted] Evaluation of MWCNT Particles‐Reinforced Magnesium Composite for Mechanical and Catalytic Applications

[Retracted] Evaluation of MWCNT Particles‐Reinforced Magnesium Composite for Mechanical and Catalytic Applications

Mechanical Properties of Sustainable Metal Matrix Composites: A Review on the Role of Green Reinforcements and Processing Methods

Compression Properties and Fabrication of Closed-Cell Metal Matrix Syntactic Foams Al2O3hs/AZ91D

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