Influence of rare earth addition on the properties of AA6351 hybrid composites

Nowadays, the effect of the rare earth addition on the performance of aluminium matrix composites is a major interest for many researchers. The present research work emphasis is on the study of the effect of praseodymium oxide (rare earth element) addition on the performance of AA6351 hybrid composites. Silicon carbide and rice husk ash in the weight proportions of 6:2 were ball-milled with various weight percentages (0.4%, 0.8%, and 1.2%) of praseodymium oxide to have a consistent microstructure and combined density equivalent to the AA6351 matrix alloy. Further, AA6351 hybrid composites with the ball-milled reinforcement of silicon carbide, rice husk ash, and praseodymium oxide were produced using stir-casting technique. Physical, microstructural, mechanical, and tribological characterization were done to study the impact of praseodymium oxide addition on the developed hybrid composites. An increment of 2.61% in the density, 49.40% in the microhardness, and 19.78% in the ultimate tensile strength was recorded with the incorporation of 1.2 weight percentage of praseodymium oxide in the AA6351 hybrid composites. The wear rate of the developed composites also improved by 32.92% with the addition of praseodymium oxide. The results exhibited a remarkable improvement in the performance of the AA6351 hybrid composites with the addition of rare earth element.

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Rare earth element and Yttrium (REY) geochemistry of Cenozoic carbonates on the Xuande Atoll of the Xisha Archipelago, the South China Sea: Implications of the impact of dolomitization on REY

GEOCHEMICAL JOURNAL ◽

10.2343/geochemj.2.0487 ◽

2017 ◽

Vol 51 (6) ◽

pp. 507-523

Author(s):

Zhenfeng Wang ◽

Keke Huang ◽

Daojun Zhang ◽

Xinyu Liu ◽

Wei Luo ◽

...

Keyword(s):

Rare Earth ◽

South China Sea ◽

Rare Earth Element ◽

South China ◽

Earth Element ◽

The South China Sea ◽

China Sea ◽

Xisha Archipelago ◽

The Impact ◽

Rey Geochemistry

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Effect of Depressants and Temperature on Bastnaesite and Monazite Flotation Separation from a Canadian Rare Earth Element (REE) Ore

Minerals ◽

10.3390/min9040225 ◽

2019 ◽

Vol 9 (4) ◽

pp. 225 ◽

Cited By ~ 1

Author(s):

Jean-Francois Boulanger ◽

Claude Bazin ◽

Keven Turgeon

Keyword(s):

Rare Earth ◽

Sodium Silicate ◽

Rare Earth Element ◽

Earth Element ◽

Guar Gum ◽

Effect Of Temperature ◽

Gangue Mineral ◽

Lower Grade ◽

Optimal Separation ◽

The Impact

A full factorial experimental design was conducted to investigate the effect of temperature and depressants on the flotation of monazite and bastnaesite from carbonate gangue minerals. Temperature, sodium silicate, and guar gum dosage were examined. Mineral reconstruction from energy-dispersive x-ray fluorescence (EDXRF) data was performed to quantify bastnaesite, monazite, and gangue mineral recoveries. Bastnaesite and monazite both follow first-order rates of recovery, with bastnaesite recovering faster and to a larger extent than monazite. The main gangue minerals were depressed together. Optimal separation efficiency was achieved using a larger Na2SiO3 dosage (2400 g/t), no guar gum addition, and a high temperature (75 °C). The rate of bastnaesite recovery increased with the temperature, while sodium silicate improved the ultimate recovery. An economic analysis was performed to evaluate the impact of increasing Rare Earth Element (REE) recovery by allowing a lower grade concentrate to be generated. Despite the high value of REEs, increasing recovery by producing a concentrate bearing more than 68 wt % carbonaceous gangue was uneconomical.

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The impact of rare-earth element to femtosecond laser induced damage of Dy3+ doped Ga0.8As39.2S60 and Ga0.8As29.2Sb10S60 chalcogenide glasses

Frontiers in Optics + Laser Science APS/DLS ◽

10.1364/fio.2019.jtu4a.29 ◽

2019 ◽

Author(s):

Lutao Liu

Keyword(s):

Rare Earth ◽

Femtosecond Laser ◽

Rare Earth Element ◽

Chalcogenide Glasses ◽

Earth Element ◽

Laser Induced Damage ◽

The Impact

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Contributions of Rare Earth Element (La,Ce) Addition to the Impact Toughness of Low Carbon Cast Niobium Microalloyed Steels

Metals and Materials International ◽

10.1007/s12540-018-0084-9 ◽

2018 ◽

Vol 24 (4) ◽

pp. 773-788 ◽

Cited By ~ 15

Author(s):

Hadi Torkamani ◽

Shahram Raygan ◽

Carlos Garcia Mateo ◽

Jafar Rassizadehghani ◽

Yahya Palizdar ◽

...

Keyword(s):

Rare Earth ◽

Impact Toughness ◽

Rare Earth Element ◽

Earth Element ◽

Microalloyed Steels ◽

Low Carbon ◽

The Impact

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The impact of redox conditions on the rare earth element signature of redoximorphic features in a soil sequence developed from limestone

Geoderma ◽

10.1016/j.geoderma.2011.10.014 ◽

2012 ◽

Vol 170 ◽

pp. 25-38 ◽

Cited By ~ 35

Author(s):

Cédric Laveuf ◽

Sophie Cornu ◽

Luiz Roberto G. Guilherme ◽

Annie Guerin ◽

Farid Juillot

Keyword(s):

Rare Earth ◽

Rare Earth Element ◽

Earth Element ◽

Redox Conditions ◽

Redoximorphic Features ◽

The Impact ◽

The Rare Earth

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The Silicon-hybrid Carbon Dot Derived from Rice Husk: A promising fluorescent probe for trivalent rare earth element ions in aqueous media

New Journal of Chemistry ◽

10.1039/d1nj04556c ◽

2021 ◽

Author(s):

Xu Chu ◽

Yan Cao

Keyword(s):

Rare Earth ◽

Fluorescent Probe ◽

Rare Earth Element ◽

Rice Husk ◽

Earth Element ◽

Aqueous Media ◽

Raw Material ◽

Carbon Dot ◽

Trivalent Rare Earth ◽

Hybrid Carbon

Silicon-hybrid carbon dot (Si-CD) was synthesized using the rice husk as a raw material via the carbonization and further acid-cutting method. The as-prepared Si-CD can be well dispersed in water...

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Numerical Modeling of REE Fractionation Patterns in Fluorapatite from the Olympic Dam Deposit (South Australia)

Minerals ◽

10.3390/min8080342 ◽

2018 ◽

Vol 8 (8) ◽

pp. 342 ◽

Cited By ~ 15

Author(s):

Sasha Krneta ◽

Cristiana Ciobanu ◽

Nigel Cook ◽

Kathy Ehrig

Keyword(s):

Numerical Modeling ◽

Rare Earth ◽

Rare Earth Element ◽

Earth Element ◽

South Australia ◽

Fluid Composition ◽

Chloride Complexes ◽

Copper Gold ◽

The Impact ◽

Olympic Dam

Trace element signatures in apatite are used to study hydrothermal processes due to the ability of this mineral to chemically record and preserve the impact of individual hydrothermal events. Interpretation of rare earth element (REE)-signatures in hydrothermal apatite can be complex due to not only evolving fO2, fS2 and fluid composition, but also to variety of different REE-complexes (Cl-, F-, P-, SO4, CO3, oxide, OH− etc.) in hydrothermal fluid, and the significant differences in solubility and stability that these complexes exhibit. This contribution applies numerical modeling to evolving REE-signatures in apatite within the Olympic Dam iron-oxide-copper-gold deposit, South Australia with the aim of constraining fluid evolution. The REE-signatures of three unique types of apatite from hydrothermal assemblages that crystallized under partially constrained conditions have been numerically modeled, and the partitioning coefficients between apatite and fluid calculated in each case. Results of these calculations replicate the measured data well and show a transition from early light rare earth element (LREE)- to later middle rare earth element (MREE)-enriched apatite, which can be achieved by an evolution in the proportions of different REE-complexes. Modeling also efficiently explains the switch from REE-signatures with negative to positive Eu-anomalies. REE transport in hydrothermal fluids at Olympic Dam is attributed to REE–chloride complexes, thus explaining both the LREE-enriched character of the deposit and the relatively LREE-depleted nature of later generations of apatite. REE deposition may, however, have been induced by a weakening of REE–Cl activity and subsequent REE complexation with fluoride species. The conspicuous positive Eu-anomalies displayed by later apatite with are attributed to crystallization from high pH fluids characterized by the presence of Eu3+ species.

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