Solid State Reaction Mechanism and Microstructure Evolution of Ni-Al Powders during High Energy Ball Milling Revisited by TEM

2015 ◽  
Vol 21 (4) ◽  
pp. 953-960 ◽  
Author(s):  
Guohua Fan ◽  
Lin Geng ◽  
Yicheng Feng ◽  
Xiping Cui ◽  
Xudong Yan
Keyword(s):  
Electron Microscopy ◽  
Ball Milling ◽  
Microstructure Evolution ◽  
Exothermic Reaction ◽  
Antiphase Boundary ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Diffusion Reaction ◽  
Energy Ball ◽  
Long Range Ordering

AbstractMicrostructure evolution during the formation of B2–NiAl by high energy ball milling of equiatomic elemental mixtures was studied by X-ray diffractometer, scanning electron microscopy, and transmission electron microscopy (TEM). The crystallite size, lattice defects and ordering of the B2–NiAl were monitored via TEM as function of milling time. The diffusion reaction, Ni+Al→NiAl3 or/and Ni2Al3, occurred during high energy ball milling, and to a certain extent offered the stored energy for the explosive exothermic reaction, Ni+Al→B2–NiAl. The fine microstructure of newly formed B2–NiAl after 5 h milling involved high density defects, e.g. antiphase boundary, long range ordering domains, vacancies, and dislocations.

The Influence of High-Energy Ball Milling and Sintering Process on the Microstructure and Mechanical Properties of Al-Ni-Y-Co-La Alloy

2013 ◽  
Vol 745-746 ◽  
pp. 281-285
Author(s):  
Y.B. Yuan ◽  
Rui Xiao Zheng ◽  
Su Jing Ge ◽  
Han Yang ◽  
Chao Li Ma
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Ball Milling ◽  
Amorphous Materials ◽  
Volume Fraction ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Process Conditions ◽  
Bulk Alloy ◽  
Energy Ball

Al86Ni7Y4.5Co1La1.5 (at.%) alloy powder was produced by argon gas atomization process. After high-energy ball milling, the powder was consolidated and extruded by using vacuum hot press sintering under different process conditions, sintering temperature, extrusion pressure, sintering time, etc.. The microstructure and morphology of the powder and consolidated bulk alloy were examined by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The phase transformation of the powder was investigated by differential scanning calorimetry (DSC). Mechanical properties of the consolidated bulk alloy were examined. The results showed that as the milling time increase, the volume fraction of amorphous materials and the hardness and yield strength of the bulk alloy were obvious improved.

Preparation of TiAl alloy powder by high-energy ball milling and diffusion reaction at low temperature

Rare Metals ◽  
2015 ◽  
Vol 37 (1) ◽  
pp. 21-25 ◽  
Author(s):  
Hui-Ping Shao ◽  
Zhi Wang ◽  
Tao Lin ◽  
Qing Ye ◽  
Zhi-Meng Guo
Keyword(s):  
Low Temperature ◽  
Ball Milling ◽  
Alloy Powder ◽  
Tial Alloy ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Diffusion Reaction ◽  
Energy Ball ◽  
And Diffusion

Microstructure evolution and interface structure of Al-40 wt% Si composites produced by high-energy ball milling

2019 ◽  
Vol 35 (4) ◽  
pp. 512-519 ◽  
Author(s):  
Yuanyuan Chen ◽  
Zhangping Hu ◽  
Yifei Xu ◽  
Jiangyong Wang ◽  
Peter Schützendübe ◽  
...  
Keyword(s):  
Ball Milling ◽  
Microstructure Evolution ◽  
High Energy ◽  
Interface Structure ◽  
High Energy Ball Milling ◽  
Energy Ball

Microstructure evolution of Ti3SiC2 powder during high-energy ball milling

2010 ◽  
Vol 36 (7) ◽  
pp. 2227-2230 ◽  
Author(s):  
Leifeng Liu ◽  
Lianjun Wang ◽  
Lu Shi ◽  
Wan Jiang
Keyword(s):  
Ball Milling ◽  
Microstructure Evolution ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Energy Ball

Preparation of Starch Nanoparticles via High-Energy Ball Milling

2016 ◽  
Vol 40 ◽  
pp. 174-179 ◽  
Author(s):  
Hua Lin ◽  
Li Zhao Qin ◽  
He Hong ◽  
Qing Li
Keyword(s):  
Electron Microscopy ◽  
Ball Milling ◽  
Potato Starch ◽  
Particle Surface ◽  
Physical Method ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Spherical Particles ◽  
Scanning Calorimetry ◽  
Energy Ball

Nano-sized starch particles were prepared from potato starch via high-energy ball milling, which is a purely physical method. Scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, differential scanning calorimetry, and viscometer were used to analyze the morphology and characteristics of the as-prepared nanoparticles. Spherical particles with an average size of approximately 120 nm were obtained after grinding the samples for 90 min, and the particles were free from any contamination. The particle surface was rough with a plush-like feature, and the adsorption ability was six times higher than that of native starch. Thus, the nano-sized starch particles can be used as a good embedding medium in biomedical and chemical materials.

High-Energy Ball-Milling of FeAl2 and Fe2Al5 Intermetallic Systems

2013 ◽  
Vol 755 ◽  
pp. 47-52 ◽  
Author(s):  
J.R. Romero-Romero ◽  
J. Luis López-Miranda ◽  
R. Esparza ◽  
M.A. Espinosa-Medina ◽  
G. Rosas
Keyword(s):  
Electron Microscopy ◽  
Phase Transformation ◽  
Ball Milling ◽  
High Energy ◽  
Milling Process ◽  
High Energy Ball Milling ◽  
High Symmetry ◽  
Scanning Calorimetry ◽  
Casting Technique ◽  
Energy Ball

In this study, FeAl2 and Fe2Al5 intermetallic alloys were prepared by conventional casting technique. In order to study their structural stability the alloys were subjected to high-energy ball milling process for 1, 2.5, 5 and 10 h. The structural and chemical characterizations were conducted by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and differential scanning calorimetry. After 10 h of milling, the experimental results indicated a phase transformation from FeAl2-triclinic phase to Fe2Al5-ortorrombic structure. This phase transformation is characterized by a change from low to high symmetry systems.

Micron to Sub-Micron Sized Highly Ordered Mesoporous Silica Particles Prepared Using a High Energy Ball Milling Process

2003 ◽  
Vol 775 ◽  
Author(s):  
J. Eric Hampsey ◽  
Claudio L. De Castro ◽  
Byron F. McCaughey ◽  
Donghai Wang ◽  
Brian S. Mitchell ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mesoporous Silica ◽  
Ball Milling ◽  
High Energy ◽  
Silica Particles ◽  
Milling Process ◽  
High Energy Ball Milling ◽  
Ordered Mesoporous Silica ◽  
Ordered Mesoporous ◽  
Energy Ball

AbstractHighly ordered mesoporous silica particles with sizes in the micron to sub-micron range are of great interest due to their applications as catalysts and filler materials. Currently, mesoporous silica particles are synthesized using large amounts of solvent, which is impractical for large scale-up in industry. This paper reports on a high-energy ball milling process that has been employed to create micron to sub-micron sized mesoporous silica particles starting from a silica xerogel prepared by a surfactant self-assembly sol-gel process. We have studied the effect of parameters such as milling media (e.g., zirconia, stainless steel, and steel centered nylon balls), milling time, the presence of surfactants during milling, particle size, and pore structure. Results from transmission electron microscopy (TEM), scanning electron microscopy (SEM), Xray diffraction (XRD), and nitrogen adsorption demonstrate the feasibility of producing large quantities of mesostructured particles by a simple milling process.

scholarly journals The Mechanical Alloying Behavior of Fe2O3 into NiO in the High-Energy Ball-Milling Process

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Y. Z. Zhu ◽  
Y. Liu ◽  
H. Huang ◽  
Y. Y. Guo ◽  
S. Y. Yin ◽  
...  
Keyword(s):  
Solid Solution ◽  
Mechanical Alloying ◽  
Ball Milling ◽  
Microstructure Evolution ◽  
Lattice Distortion ◽  
High Energy ◽  
Milling Process ◽  
High Energy Ball Milling ◽  
Sintering Process ◽  
Energy Ball

The NiO and Fe2O3 powders were mixed by the high-energy ball-milling, followed by a sintering of the mixture at 1340°C for 0.5 h. XRD, SEM, DSC, and size measurements were preformed to study the microstructure evolution in the high-energy ball-milled mixture and the sintered ones, as well. It showed that the high-energy ball-milling processes resulted in a severe lattice distortion in the powder of Fe2O3, but only a slight lattice distortion in NiO. Meanwhile, a solid solution of iron atoms into the NiO lattice was also detected in the milling process. It was also found that the solubility of the iron atoms into the NiO lattice delayed the synthesizing reaction in the following sintering process.

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