Precipitation of secondary phase in Mg-Zn-Gd alloy after room-temperature deformation and annealing

Huang, Hua; Miao, Hongwei; Chen, Chunlin; Wang, Zhongchang

doi:10.1016/j.jmrt.2017.04.006

Cited by 21 publications

(2 citation statements)

References 71 publications

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“…The quasicrystalline alloys of Mg-Zn-Re (where Re = rear earth element) have been extensively researched. It has been confirmed that the Zn/Y ratios of I-phase (Mg 3 Zn 6 Y 1 ) and W-phase (Mg 3 Zn 3 Y 2 ) are 6 and 1.5, respectively [14]. These ratios are in accordance with those for Mg-Zn-Gd alloys.…”

Section: Introductionsupporting

confidence: 74%

The Study of A New Symmetrical Rod Phase in Mg-Zn-Gd Alloys

Yue

Feng

et al. 2019

Symmetry

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Quasicrystal alloys have a wide application prospect because of excellent performances and characteristics; meanwhile, magnesium alloys are known as green engineering materials because of their high specific strength and light weight. Therefore, the study of Mg-Zn-Gd quasicrystal alloys is of great significance for the development of new materials. In this paper, Mg(70-x)Zn30Gdx(x=3,4,5) alloys were prepared by a conventional casting method and the morphologies and properties of these alloys were studied. There was a new symmetrical rod phase found in the Mg66Zn30Gd4 alloy and the symmetrical rod phase was identified as a ternary phase by mapping scanning and energy dispersive spectroscopy (EDS) analysis. The Zn/Gd ratio of the symmetrical rod phase was found to be 4.8 and the TEM images obtained were different from the typical diffraction spots patterns of quasicrystalline, which means it is unlikely to be quasicrystalline. With different melt holding time, the symmetrical rod phase evolved gradually over time from a lamellar eutectic structure; differential scanning calorimetry (DSC), heat treatment, and microhardness tests showed that the melting temperature of the rod phase was 453 °C and that its thermal stability and microhardness are better than quasicrystalline. Hence, the symmetrical rod phase is a new kind of complex metallic alloy phase whose composition and properties are close to those of quasicrystals but is not quasicrystalline.

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Section: Introductionsupporting

confidence: 74%

The Study of A New Symmetrical Rod Phase in Mg-Zn-Gd Alloys

Yue

Feng

et al. 2019

Symmetry

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“…Magnesium alloy has become one of the new biomaterials because of their similar elastic modulus to cortical bone, which can eliminate the stress shielding in implantation and can also be degraded in vivo and safely absorbed or metabolized by the human body to avoid secondary surgery. Scholars successfully developed a patented medical magnesium alloy JDBM [131][132][133] implant with uniform controllable degradation, strong toughness matching and good biocompatibility by controlling the phase potential and microstructure design of magnesium alloy materials. Subsequently, they developed a patented coating technology with biological activity, which can be degraded by itself and can inhibit the excessive degradation of the matrix.…”

Section: Biological Properties Of Nanoparticle-reinforced Magnesium M...mentioning

confidence: 99%

Nano-Enhanced Phase Reinforced Magnesium Matrix Composites: A Review of the Matrix, Reinforcement, Interface Design, Properties and Potential Applications

Ren,

Ji,

Guo

et al. 2024

Materials

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Magnesium matrix composites are essential lightweight metal matrix composites, following aluminum matrix composites, with outstanding application prospects in automotive, aerospace lightweight and biomedical materials because of their high specific strength, low density and specific stiffness, good casting performance and rich resources. However, the inherent low plasticity and poor fatigue resistance of magnesium hamper its further application to a certain extent. Many researchers have tried many strengthening methods to improve the properties of magnesium alloys, while the relationship between wear resistance and plasticity still needs to be further improved. The nanoparticles added exhibit a good strengthening effect, especially the ceramic nanoparticles. Nanoparticle-reinforced magnesium matrix composites not only exhibit a high impact toughness, but also maintain the high strength and wear resistance of ceramic materials, effectively balancing the restriction between the strength and toughness. Therefore, this work aims to provide a review of the state of the art of research on the matrix, reinforcement, design, properties and potential applications of nano-reinforced phase-reinforced magnesium matrix composites (especially ceramic nanoparticle-reinforced ones). The conventional and potential matrices for the fabrication of magnesium matrix composites are introduced. The classification and influence of ceramic reinforcements are assessed, and the factors influencing interface bonding strength between reinforcements and matrix, regulation and design, performance and application are analyzed. Finally, the scope of future research in this field is discussed.

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Epitaxial Growth of PbS Nanocrystals from PbI₂ Nanosheet Templates and Its Application in Fast Near‐Infrared Photodetectors

Jin

Lan

et al. 2020

Advanced Optical Materials

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Heterostructures of 0D/2D materials synergistically combine the advantages of two different materials, and photodetectors (PDs) based on such heterostructures demonstrate superior detection properties as compared to those based on each individual material. Here, a facile solution method is proposed for the fabrication of 0D/2D heterostructures to overcome the limitations of the traditional chemical vapor deposition method. The 0D PbS nanocrystals (NCs) are epitaxially grown from 2D‐PbI2 nanosheet templates by a simple wet‐chemical sulfuration process. The resulting heterojunction PDs demonstrate wide detection range up to 2000 nm, a fast photoresponse of ≈400 µs, and a specific detectivity of more than 1012 Jones. The superior device performances are attributed to the underneath PbI2 layer, which can not only be used as the precursor layer but also help to passivate the defect states of PbS NCs. More importantly, the developed Structured II device with Au–PbI2 Schottky contact effect can suppress the dark current of PD to extend its depletion region and improve the response speed. Overall, this study demonstrates a novel strategy for the growth of 0D/2D heterostructures in conjunction with fast near‐infrared detection, which surmount the limitations of photoconductive detectors in terms of large‐scale synthesis and response speed.

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Precipitation of secondary phase in Mg-Zn-Gd alloy after room-temperature deformation and annealing

Cited by 21 publications

References 71 publications

The Study of A New Symmetrical Rod Phase in Mg-Zn-Gd Alloys

The Study of A New Symmetrical Rod Phase in Mg-Zn-Gd Alloys

Nano-Enhanced Phase Reinforced Magnesium Matrix Composites: A Review of the Matrix, Reinforcement, Interface Design, Properties and Potential Applications

Epitaxial Growth of PbS Nanocrystals from PbI₂ Nanosheet Templates and Its Application in Fast Near‐Infrared Photodetectors

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Precipitation of secondary phase in Mg-Zn-Gd alloy after room-temperature deformation and annealing

Cited by 21 publications

References 71 publications

The Study of A New Symmetrical Rod Phase in Mg-Zn-Gd Alloys

The Study of A New Symmetrical Rod Phase in Mg-Zn-Gd Alloys

Nano-Enhanced Phase Reinforced Magnesium Matrix Composites: A Review of the Matrix, Reinforcement, Interface Design, Properties and Potential Applications

Epitaxial Growth of PbS Nanocrystals from PbI2 Nanosheet Templates and Its Application in Fast Near‐Infrared Photodetectors

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Epitaxial Growth of PbS Nanocrystals from PbI₂ Nanosheet Templates and Its Application in Fast Near‐Infrared Photodetectors