Facile and Scalable Synthesis of Ultrafine MnCo2O4 Nanoparticles Via Mechanical Alloying as Supercapacitive Materials

Al3Zr has the highest melting temperature (1580°C) among the tri-aluminide intermetal1ics. When prepared by casting, Al3Zr forms in the tetragonal DO23 structure but by rapid quenching or by mechanical alloying (MA) it can also be prepared in the metastable cubic L12 structure. The L12 structure can be stabilized to at least 1300°C by the addition of copper and other elements. We report a TEM study of the microstructure of bulk Al5CuZr2 prepared by hot pressing mechanically alloyed powder.MA was performed in a Spex 800 mixer using a hardened steel container and balls and adding hexane as a surfactant. Between 1.4 and 2.4 wt.% of the hexane decomposed during MA and was incorporated into the alloy. The mechanically alloyed powders were degassed in vacuum at 900°C. They were compacted in a ram press at 900°C into fully dense samples having Vickers hardness of 1025. TEM specimens were prepared by mechanical grinding followed by ion milling at 120 K. TEM was performed on a Philips CM30 at 300kV.

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Dynamic compaction domain (shock compaction energy vs. ρ0/ρ) for a Fe-15 atomic % Cu nanometric alloy obtained by mechanical alloying

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:20020792 ◽

2003 ◽

Vol 110 ◽

pp. 803-808 ◽

Cited By ~ 1

Author(s):

R. G. Esquives ◽

E. M. Orozco ◽

C. T. Renero ◽

D. V. Jaramillo

Keyword(s):

Mechanical Alloying ◽

Dynamic Compaction ◽

Shock Compaction ◽

Compaction Energy

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Mechanical properties of FeAlSi powders prepared by mechanical alloying from different initial feedstock materials

Matériaux & Techniques ◽

10.1051/mattech/2018063 ◽

2019 ◽

Vol 107 (2) ◽

pp. 207 ◽

Cited By ~ 2

Author(s):

Jaroslav Čech ◽

Petr Haušild ◽

Miroslav Karlík ◽

Veronika Kadlecová ◽

Jiří Čapek ◽

...

Keyword(s):

Mechanical Properties ◽

Mechanical Alloying ◽

Young’S Modulus ◽

Milling Time ◽

Young's Modulus ◽

Element Model ◽

X Ray Diffraction ◽

X Ray ◽

Powder Particles ◽

Complete Homogenization

FeAl20Si20 (wt.%) powders prepared by mechanical alloying from different initial feedstock materials (Fe, Al, Si, FeAl27) were investigated in this study. Scanning electron microscopy, X-ray diffraction and nanoindentation techniques were used to analyze microstructure, phase composition and mechanical properties (hardness and Young’s modulus). Finite element model was developed to account for the decrease in measured values of mechanical properties of powder particles with increasing penetration depth caused by surrounding soft resin used for embedding powder particles. Progressive homogenization of the powders’ microstructure and an increase of hardness and Young’s modulus with milling time were observed and the time for complete homogenization was estimated.

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Hydrogenation Properties of Mg-5 wt.% TiCr10NbX (x=1,3,5) Composites by Mechanical Alloying Process

Korean Journal of Metals and Materials ◽

10.3365/kjmm.2011.49.3.264 ◽

2011 ◽

Vol 49 (03) ◽

pp. 264-269 ◽

Cited By ~ 27

Author(s):

Kyeong-Il Kim ◽

Tae-Whan Hong

Keyword(s):

Mechanical Alloying

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Rietveld quantitative phase analyses in iron alloys processed by mechanical alloying method

Zeitschrift für Kristallographie Supplements ◽

10.1524/zksu.2009.0042 ◽

2009 ◽

Vol 2009 (30) ◽

pp. 291-296

Author(s):

H. J. Krzton ◽

W. Pilarczyk

Keyword(s):

Mechanical Alloying ◽

Iron Alloys ◽

Quantitative Phase

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Scalable Synthesis of Functionalized Ferrocenyl Azides and Amines Enabled by Flow Chemistry

10.26434/chemrxiv.11321975 ◽

2019 ◽

Author(s):

Merlin Kleoff ◽

Johannes Schwan ◽

Lisa Boeser ◽

Bence Hartmayer ◽

Mathias Christmann ◽

...

Keyword(s):

Reaction Time ◽

Heterogeneous Reaction ◽

Reduction Process ◽

Flow Chemistry ◽

Subsequent Reaction ◽

Scalable Synthesis ◽

High Yields ◽

Reactor Section

A scalable access to functionalized 1,1’- and 1,2-ferrocenyl azides has been realized in flow. By halogen‒lithium exchange of ferrocenyl halides and subsequent reaction with tosyl azide, a variety of functionalized ferrocenyl azides was obtained in high yields. To allow a scalable preparation of these potentially explosive compounds, an efficient flow protocol was developed accelerating the reaction time to minutes and circumventing accumulation of potentially hazardous intermediates. Switching from homogeneous to triphasic flow amidst process was key for handling a heterogeneous reaction mixture formed after a heated reactor section. The corresponding and synthetically versatile ferrocenyl amines were then prepared by a reliable reduction process.

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