Constitution and Properties of the Ternary Magnesium Alloys Containing Two Rare-Earth Metals of Different Subgroups

Рохлин, Л. Л.; Dobatkina, T. V.; Nikitina, N. I.

doi:10.4028/www.scientific.net/msf.419-422.291

Cited by 64 publications

(41 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several REE-doped Mg alloys such as WE43, Mg-5Gd, LAE442 and Mg-4Y have been investigated [33]. improving strength and corrosion resistance [60]. Furthermore, the REE elements with limited solubility tend to form inter-metallic phases early during the solidification process [56]; for example, Ce aggregate at solid-liquid interfaces during solidification in Mg-Al-Ce alloys.…”

Section: Effects Of Alloying Element On Mechanical and Corrosion Propmentioning

confidence: 99%

Biodegradable magnesium alloys for orthopaedic applications: A review on corrosion, biocompatibility and surface modifications

Agarwal

Curtin²,

Duffy

et al. 2016

Materials Science and Engineering: C

740

363

View full text Add to dashboard Cite

Magnesium (Mg) and its alloys have been extensively explored as potential biodegradable implant materials for orthopaedic applications (e.g. Fracture fixation). However, the rapid corrosion of Mg based alloys in physiological conditions has delayed their introduction for therapeutic applications to date. The present review focuses on corrosion, biocompatibility and surface modifications of biodegradable Mg alloys for orthopaedic applications. Initially, the corrosion behaviour of Mg alloys and the effect of alloying elements on corrosion and biocompatibility is discussed. Furthermore, the influence of polymeric deposit coatings, namely sol-gel, synthetic aliphatic polyesters and natural polymers on corrosion and biological performance of Mg and its alloy for orthopaedic applications are presented. It was found that inclusion of alloying elements such as Al, Mn, Ca, Zn and rare earth elements provides improved corrosion resistance to Mg alloys. It has been also observed that sol-gel and synthetic aliphatic polyesters based coatings exhibit improved corrosion resistance as compared to natural polymers, which has higher biocompatibility due to their biomimetic nature. It is concluded that, surface modification is a promising approach to improve the performance of Mg-based biomaterials for orthopaedic applications.

show abstract

Section: Effects Of Alloying Element On Mechanical and Corrosion Propmentioning

confidence: 99%

Biodegradable magnesium alloys for orthopaedic applications: A review on corrosion, biocompatibility and surface modifications

Agarwal

Curtin²,

Duffy

et al. 2016

Materials Science and Engineering: C

740

363

View full text Add to dashboard Cite

show abstract

“…Therefore, this particular heat treatment not only induced re-formation of strengthening precipitates, but also influenced the β-phase distribution and caused homogenisation of the structure (comparing to conventional ageing treatments at lower temperatures and longer time periods, which usually only have the first mentioned effect). The compositions of the Dy-rich precipitates corresponded to the Mg 3 Dy phase, which had been reported to develop in Mg-Dy alloys subjected to annealing temperatures lower than 520 • C [20]. However, the high amount of Al substituting Mg in these precipitates imparts their more precise determination to be (AlMg) 3 Dy.…”

Section: Discussionmentioning

confidence: 99%

Comprehensive Characterisation of a Newly Developed Mg–Dy–Al–Zn–Zr Alloy Structure

Kunčická

Kocich

2018

Metals

View full text Add to dashboard Cite

This is a report on the structure phases and precipitates in a newly developed Mg-10Dy-3Al-1Zn-0.2Zr alloy. Specimens from the cast alloy were heat treated at temperatures of 480 • C, 520 • C and 560 • C, all for 8 and 16 h, and subsequently quenched. The structures were then analysed using scanning and transmission electron microscopy, while the mechanical properties were investigated using microhardness measurements. The results showed the different temperatures, as well as times, influence both the chemical composition and morphology of the precipitated phases. The occurrence of the β-phase changed with increasing temperature and time from grain boundary segregations through fine elongated particles to coarse plate-like precipitates. Polygon-shaped Dy-rich precipitates were observed in all the samples; however, their size decreased and their distribution homogenised with increasing annealing temperature and time. The samples annealed at 520 • C and 560 • C exhibited the presence of lamellar 18R-type long period stacking ordered (LPSO) phases. Microhardness measurements were in accordance with results of the microscopic analyses; although the values varied between 60 and 65 HV for all the material states, the most uniform distribution was observed for the 560 • C/8-h sample, which featured the finest precipitates and LPSO phases.

show abstract

“…Bastnesite concentrates are relatively straightforward to treat 28 . First, bastnesite concentrates are roasted to decompose carbonate minerals prior leaching with either hydrochloric or sulfuric acid.…”

Section: Rare Earth Metal Separationmentioning

confidence: 99%

“…Other option is to oxidize cerium in aqueous phase after leaching all rare earths and recover it by filtration. For example, Ce(OH)4 was precipitated at thorium plant using ammonium carbonate and ammonium persulfate 28 . Monazite and xenotime concentrates can be leached to decompose the orhophsphate lattice by either sodium hydroxide or sulfuric acid at elevated temperature.…”

Section: Rare Earth Metal Separationmentioning

confidence: 99%

Rare earth element enrichment using membrane based solvent extraction

Makertiharta¹,

Dharmawijaya²,

Zunita³

et al. 2017

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. The chemical, catalytic, electrical, magnetic, and optical properties of rare earth elements are required in broad applications. Rare earth elements have similar physical and chemical properties thus it is difficult to separate one from each other. Rare earth element is relatively abundant in earth's crust but rarely occur in high concentrated deposits. Traditionally, ion-exchange and solvent extraction techniques have been developed to separate and purify single rare earth solutions or compounds. Recently, membrane starts to gain attention for rare earth separation by combining membrane and proven technologies such as solvent extraction. Membrane-based process offers selective, reliable, energy efficient and easy to scale up separation. During membrane-based separation process, one phase passes through membrane pores while the other phase is rejected. There is no direct mixing of two phases thus the solvent loss is very low. Membrane can also lower solvent physical properties requirement (viscosity, density) and backmixing, eliminate flooding phenomenon and provide large interfacial area for mass transfer. This paper will summarize research efforts in developing membrane technology for rare earth element separation. Special attention will be given to solvent extraction related process as the commonly used method for rare earth element separation. Furthermore, membrane configuration and its potentials will also be discussed.

show abstract

Constitution and Properties of the Ternary Magnesium Alloys Containing Two Rare-Earth Metals of Different Subgroups

Cited by 64 publications

References 0 publications

Biodegradable magnesium alloys for orthopaedic applications: A review on corrosion, biocompatibility and surface modifications

Biodegradable magnesium alloys for orthopaedic applications: A review on corrosion, biocompatibility and surface modifications

Comprehensive Characterisation of a Newly Developed Mg–Dy–Al–Zn–Zr Alloy Structure

Rare earth element enrichment using membrane based solvent extraction

Contact Info

Product

Resources

About