Comparison of Shallow (−20 °C) and Deep Cryogenic Treatment (−196 °C) to Enhance the Properties of a Mg/2wt.%CeO2 Nanocomposite

Gupta, Shwetabh; Parande, Gururaj; Gupta, Manoj

doi:10.3390/technologies12020014

Cited by 4 publications

(3 citation statements)

References 27 publications

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Section: Thermal Responsesupporting

confidence: 93%

“…These peaks can be attributed to the release of compressive stresses stored during DCT within the matrix and particle-matrix interfaces. The results are consistent with earlier findings [25,26]. The ignition studies reveal that the presence of reinforcement in micron and nanolength scales increased the ignition temperature by 11.0% (64 • C) and 10.0% (58 • C), respectively, when compared to pure magnesium in the as-extruded condition (Table 5 and Figure 5).…”

Section: Thermal Responsesupporting

confidence: 92%

“…Pure Mg [31] 55 ± 3 Mg-2CeO2 (AE-nano) [25] 86 ± 2 Mg-2CeO2 (LN-nano) [25,26] 92 ± 4 (↑7%) Mg-2CeO2 (AE-micron) 74 ± 3 Mg-2CeO2 (LN-micron) 88 ± 7 (↑19%)…”

Section: Composition Microhardness (Hv)mentioning

confidence: 99%

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An Investigation into the Effect of Length Scale of Reinforcement on the Cryogenic Response of a Mg/2wt.%CeO2 Composite

Gupta,

Johanes,

Parande

et al. 2024

Micro

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The present study attempted for the first time an investigation on the effect of deep cryogenic treatment in liquid nitrogen (LN) on magnesium–cerium oxide (Mg/2wt.%CeO2) composites containing equal amounts of different length scales (micron and nanosize) cerium oxide (CeO2) particles. The disintegrated melt deposition method was used to synthesize Mg-2CeO2 micro- and nanocomposites, followed by hot extrusion as the secondary processing. Further liquid nitrogen treatment was performed at a cryogenic temperature of −196 °C. The combined effects of cryogenic treatment and reinforcement length scale on physical, mechanical, and thermal behaviors were studied. The results indicate that LN-treated micro- and nanocomposite samples exhibit, in common, a reduction in porosity, similar grain size, and a limited effect on the original texture of the matrix. However, microhardness, 0.2% Compressive Yield Strength (CYS), failure strain, and energy absorbed increased for both micro- and nanocomposite samples. Overall, results clearly indicate the capability of deep cryogenic treatment with LN to positively diversify the properties of both micro- and nanocomposite samples.

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Section: Thermal Responsesupporting

confidence: 93%

Section: Thermal Responsesupporting

confidence: 92%

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An Investigation into the Effect of Length Scale of Reinforcement on the Cryogenic Response of a Mg/2wt.%CeO2 Composite

Gupta,

Johanes,

Parande

et al. 2024

Micro

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Enhancing Microstructural, Thermal, Mechanical, and Corrosion Response of a Bio/Eco‐Compatible Mg–2Zn–1Ca–0.3Mn Alloy Using Two Types of Cryogenic Treatments

Sole,

Johanes,

Gupta

2024

Adv Eng Mater

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Biocompatible Mg–2Zn–1Ca–0.3Mn is synthesized using the disintegrated metal deposition process and subjected to two types of cryogenic treatments (refrigeration [RF] at −20 and −196 °C using liquid nitrogen) with a target to improve microstructural, thermal, mechanical, and electrochemical responses. The material exhibits densification and grain refinement after these treatments, which improves the physical, thermal, compressive, and corrosion responses. While both RF and liquid nitrogen exposures improve the overall combination of properties, overall improvement in properties is best met with RF treatment at −20 °C. In the results of this work, the efficacy of low energy option (RF) is convincingly established rather than liquid nitrogen exposure (as conventionally practiced) to enhance microstructure and properties.

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An Insight into the Varying Effects of Different Cryogenic Temperatures on the Microstructure and the Thermal and Compressive Response of a Mg/SiO2 Nanocomposite

Johanes,

Mehtabuddin,

Venkatarangan

et al. 2024

Metals

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This study for the first time reports that insights into microstructure and thermal and compressive responses can be best achieved following exposure to different cryogenic temperatures and that the lowest cryogenic temperature may not always produce the best results. In the present study, a Mg-SiO2 biocompatible and environment-friendly nanocomposite was synthesized by using the Disintegrated Melt Deposition method followed by hot extrusion. Subsequently, it was subjected to four different sub-zero temperatures (−20 °C, −50 °C, −80 °C, and −196 °C). The results reveal the best densification at −80 °C, marginally improved ignition resistance at 50 °C, the best damping response at −80 °C, the best microhardness at −50 °C, and the best compressive response at −20 °C. The results clearly indicate that the cryogenic temperature should be carefully chosen depending on the property that needs to be particularly enhanced governed by the principal requirement of the end application.

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Comparison of Shallow (−20 °C) and Deep Cryogenic Treatment (−196 °C) to Enhance the Properties of a Mg/2wt.%CeO2 Nanocomposite

Cited by 4 publications

References 27 publications

An Investigation into the Effect of Length Scale of Reinforcement on the Cryogenic Response of a Mg/2wt.%CeO2 Composite

An Investigation into the Effect of Length Scale of Reinforcement on the Cryogenic Response of a Mg/2wt.%CeO2 Composite

Enhancing Microstructural, Thermal, Mechanical, and Corrosion Response of a Bio/Eco‐Compatible Mg–2Zn–1Ca–0.3Mn Alloy Using Two Types of Cryogenic Treatments

An Insight into the Varying Effects of Different Cryogenic Temperatures on the Microstructure and the Thermal and Compressive Response of a Mg/SiO2 Nanocomposite

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