Formation of a supersaturated solid solution in copper-silver alloys by mechanical alloying

Nanocrystalline Ag-28Cu supersaturated solid solution is prepared by mechanical alloying (MA) using a planetary ball mill. The mechanical alloyed powders are characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM) and differential scanning calorimeter (DSC). XRD patterns show that the main peak of Ag-28Cu supersaturated solid solution exists at about 2θ=39° when the milling time is 30h. HRTEM images show that the grain sizes of as-prepared solid solutions have distributions from 10nm to 15nm. The interplanar spacing of (111) plane for fcc Ag-28Cu supersaturated solid solution is about 2.24Å. DSC measurement result indicates that the melting temperature of Ag-28Cu supersaturated solid solution is 783.8°C. The Ag(Cu) supersaturated solid solutions are in metastable state and they will be transformed into Ag-rich phase and Cu-rich phase simultaneously by annealing at 215°C- 415°C.

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Bulk Mechanical Alloying of Al/Fe Multilayer by Accumulative Roll-Bonding Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.26-28.695 ◽

2007 ◽

Vol 26-28 ◽

pp. 695-698 ◽

Cited By ~ 2

Author(s):

Takuro Nakamura ◽

Hiromoto Kitahara ◽

Jung Goo Lee ◽

Nobuhiro Tsuji

Keyword(s):

Solid Solution ◽

Intermetallic Compound ◽

Mechanical Alloying ◽

Accumulative Roll Bonding ◽

Supersaturated Solid Solution ◽

Shear Bands ◽

Equivalent Strain ◽

Bonding Process ◽

Accumulative Roll Bonding Process ◽

Roll Bonding

Pure Al (99%) and pure Fe (99.5%) sheets were mutually stacked and severely deformed up to equivalent strain of 16 by the accumulative roll bonding (ARB) process in an attempt to achieve bulk mechanical alloying. The deformation was carried out at RT. The Al/Fe sheets ARB processed by 1 cycle showed a number of shear bands penetrating the stacked layers. The Fe layers, which were harder than the Al layers, were subdivided by the shear bands into diamond-shaped regions. Dissolution of Fe into Al was observed and a supersaturated solid solution was formed in the specimen ARB processed by 10 cycles. It was also found that local amorphization occurred at interface regions via formation of Al5Fe2 intermetallic compound.

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Supersaturated solid solution obtained by mechanical alloying of 75% Fe, 20% Ge and 5% Nb mixture at different milling intensities

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2008.01.144 ◽

2009 ◽

Vol 469 (1-2) ◽

pp. 169-178 ◽

Cited By ~ 14

Author(s):

J.S. Blázquez ◽

J.J. Ipus ◽

M. Millán ◽

V. Franco ◽

A. Conde ◽

...

Keyword(s):

Solid Solution ◽

Mechanical Alloying ◽

Supersaturated Solid Solution

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Fe-Zn supersaturated solid solution prepared by mechanical alloying and laser sintering to accelerate degradation

Journal of Central South University ◽

10.1007/s11771-021-4688-8 ◽

2021 ◽

Vol 28 (4) ◽

pp. 1170-1182

Author(s):

You-wen Yang ◽

Guo-qing Cai ◽

Li-da Shen ◽

Cheng-de Gao ◽

Shu-ping Peng ◽

...

Keyword(s):

Solid Solution ◽

Mechanical Alloying ◽

Supersaturated Solid Solution ◽

Laser Sintering ◽

Accelerate Degradation

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Nanocrystalline Ni-Mo Alloys Prepared by Mechanical Alloying for Applications in Catalysis

MRS Proceedings ◽

10.1557/proc-286-221 ◽

1992 ◽

Vol 286 ◽

Cited By ~ 3

Author(s):

R. Schulz ◽

L Dignard-Bailey ◽

M.L Trudeau ◽

J.Y. Huot ◽

Z.H. Yan

Keyword(s):

Solid Solution ◽

Mechanical Alloying ◽

Solid Solutions ◽

Hydrogen Evolution Reaction ◽

Electrocatalytic Activity ◽

Crystal Size ◽

Supersaturated Solid Solution ◽

Alkaline Solutions ◽

Average Crystal Size ◽

Mo Content

ABSTRACTAmorphous and nanocrystalline Nil-xMox alloys have been prepared by mechanical alloying of pure Ni and Mo elemental powders in an atmosphere containing various amounts of oxygen. Metastable fcc solid solutions are formed when the Mo content is less than 30 at.%. The amorphization of the supersaturated solid solution occurs when the Mo concentration exceeds 30 at.%. The electrocatalytic properties of the nanocrystalline alloys for the hydrogen evolution reaction in alkaline solutions have been investigated. High electrocatalytic activity is found when the average crystal size is below 10 nm and when the supersaturated solid solution contains some oxygen.

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