Microstructure of the novel biomedical Mg–4Y–3Nd alloy prepared by spark plasma sintering

Minárik, Peter; Zemková, Mária; Lukáč, František; Bohlen, Jan; Knapek, Michal; Král, Róbert

doi:10.1016/j.jallcom.2019.153008

Cited by 30 publications

(22 citation statements)

References 56 publications

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“…Although not evident in the XRD spectrum, small cubic-shaped particles in microstructure were analyzed as YH x hydrides according to EDS results. A similar observation was confirmed in various publications [25,33,34]. The solid solution (S1) contained 2.1 ± 0.3 wt % Y, 1.0 ± 0.1 wt % Nd, 0.6 ± 0.2 wt % Zr, 0.2 ± 0.1 wt % Dy, 0.2 ± 0.1 wt % Gd.…”

Section: Microstructure Characterizationsupporting

confidence: 88%

“…There was residual trapped air between powder particles which allowed the surface oxidation of individual particles. The formation of oxide shell consumed Y in the near surroundings of the surface as has been already suggested in the literature [32,33,[36][37][38][39]. The original dendritic microstructure in atomized powder turned into a homogenous microstructure with fine precipitates similar to the T4Ex state.…”

Section: Microstructure Characterizationmentioning

confidence: 58%

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Microstructure, Mechanical, Corrosion, and Ignition Properties of WE43 Alloy Prepared by Different Processes

Dvorský

Kubásek

Hosová

et al. 2021

Metals

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This paper deals with the effect of microstructure condition on ignition temperature, mechanical and corrosion properties of commercial WE43 alloy prepared by various processing techniques including conventional casting, extrusion, and powder metallurgy methods such as spark plasma sintering. For different processing technique, differences in microstructures were observed, including different grain sizes, intermetallic phases, amount of alloying elements in the solid solutions, or specific structural elements. Mechanical and corrosion properties were improved especially by grain refinement. Precipitation from oversaturated solid solutions led to further improvement of mechanical properties, while corrosion resistance was just slightly decreased due to the fine and homogeneously distributed precipitates of Mg41Nd5. The obtained results indicate huge differences in ignition resistance based on the metallurgical state of the microstructure. An improved ignition resistance was obtained at the condition with a higher concentration of proper alloying elements (Y, Nd, Gd, Dy) in the solid solution and absence of eutectic phases in the microstructure. Thermally stable intermetallic phases had a minor effect on resulting ignition temperature.

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Section: Microstructure Characterizationsupporting

confidence: 88%

Section: Microstructure Characterizationmentioning

confidence: 58%

Microstructure, Mechanical, Corrosion, and Ignition Properties of WE43 Alloy Prepared by Different Processes

Dvorský

Kubásek

Hosová

et al. 2021

Metals

View full text Add to dashboard Cite

show abstract

“…In these areas, a lower amount of new grains formed and, therefore, they became larger [ 26 ]. The overall decrease in the residual strain with increasing sintering temperature is a common feature observed before, see, e.g., [ 27 ].…”

Section: Discussionsupporting

confidence: 68%

Effect of Short Attritor-Milling of Magnesium Alloy Powder Prior to Spark Plasma Sintering

et al. 2020

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The spark plasma sintering (SPS) technique was employed to prepare compacts from (i) gas-atomized and (ii) attritor-milled AE42 magnesium powder. Short attritor-milling was used mainly to disrupt the MgO shell covering the powder particles and, in turn, to enhance consolidation during sintering. Compacts prepared by SPS from the milled powder featured finer microstructures than compacts consolidated from gas-atomized powder (i.e., without milling), regardless of the sintering temperatures in the range of 400–550 °C. Furthermore, the grain growth associated with the increase in the sintering temperature in these samples was less pronounced than in the samples prepared from gas-atomized particles. Consequently, the mechanical properties were significantly enhanced in the material made of milled powder. Apart from grain refinement, the improvements in mechanical performance were attributed to the synergic effect of the irregular shape of the milled particles and better consolidation due to effectively disrupted MgO shells, thus suppressing the crack formation and propagation during loading. These results suggest that relatively short milling of magnesium alloy powder can be effectively used to achieve superior mechanical properties during consolidation by SPS even at relatively low temperatures.

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“…The presence of alloying elements will lead to the appearance of a second phase in the magnesium alloy. The second phase is usually a compound of Mg and Al [96,97] , Zn [98] , rare earth and other metal elements [99,100] , and its electrochemical stability is higher than that of the matrix phase. Therefore, the corrosion behavior of magnesium alloys is mainly Fig.…”

Section: Mg 2clmentioning

confidence: 99%

Research Progress on Corrosion Resistance of Magnesium Alloys with Bio-inspired Water-repellent Properties: A Review

Cai

Lian

et al. 2021

J Bionic Eng

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Thanks to its excellent mechanical properties, magnesium alloys have many potential applications in the aerospace and other fields. However, failure to adequately solve corrosion problems of magnesium alloy becomes one of the factors restricting its wide use in many industrial fields. Inspired by nature, researchers designed and fabricated bio-inspired water-repellent (superhydrophobic and slippery liquid-infused porous surface) surfaces with special wetting properties by exploring the surface microstructures of plants and animals such as lotus leaf and nepenthes pitcher, exhibiting excellent corrosion-resistant performance. This article summarizes the research progress on corrosion resistance of magnesium alloys with bio-inspired water-repellent properties in recent years. It mainly introduces the corrosion reasons, types of corrosion of magnesium alloys, and the preparation of magnesium alloys with bio-inspired water-repellent properties to improve corrosion resistance. In particular, it is widely used and effective to construct water-repellent and anti-corrosion coating on the surface of magnesium alloy by surface treatment. It is hoped that the research in this review can broaden the application range of magnesium alloys and provide a powerful reference for the future research on corrosion resistance of magnesium alloys.

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Microstructure of the novel biomedical Mg–4Y–3Nd alloy prepared by spark plasma sintering

Cited by 30 publications

References 56 publications

Microstructure, Mechanical, Corrosion, and Ignition Properties of WE43 Alloy Prepared by Different Processes

Microstructure, Mechanical, Corrosion, and Ignition Properties of WE43 Alloy Prepared by Different Processes

Effect of Short Attritor-Milling of Magnesium Alloy Powder Prior to Spark Plasma Sintering

Research Progress on Corrosion Resistance of Magnesium Alloys with Bio-inspired Water-repellent Properties: A Review

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