NITROGENATION AND SUBSEQUENT SURFACTANT-ASSISTED HIGH ENERGY BALL MILLING OF Sm2Fe17 MELT-SPUN POWDERS

Sm 2 Fe 17 melt-spun powders were subjected to the nitriding process and followed by surfactant-assisted high-energy ball milling (HEBM). The microstructures, morphology and magnetic properties were also investigated by X-ray diffractometer, scanning electron microscope and vibrating sample magnetometer. The results showed that the coercivities of the nitrided Sm 2 Fe 17 powders were 1.64 kOe and 3.65 kOe when the nitriding temperatures were 350°C and 450°C, respectively. When the nitriding temperature was 350°C, there was a wasp-shaped hysteresis loop, due to the soft phase of iron, formed during the nitrogenation process. The subsequent surfactant-assisted HEBM can further improve the magnetic properties of the nitrided Sm 2 Fe 17 powders and a 3 h milling process increased the coercivity of the sample nitrided at 450°C reached a high value of 6.97 kOe.

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Morphology and magnetic properties of CeCo5 submicron flakes prepared by surfactant-assisted high-energy ball milling

Journal of Magnetism and Magnetic Materials ◽

10.1016/j.jmmm.2012.05.026 ◽

2012 ◽

Vol 324 (20) ◽

pp. 3272-3275 ◽

Cited By ~ 24

Author(s):

J.J. Zhang ◽

H.M. Gao ◽

Y. Yan ◽

X. Bai ◽

F. Su ◽

...

Keyword(s):

Magnetic Properties ◽

Ball Milling ◽

High Energy ◽

High Energy Ball Milling ◽

Energy Ball ◽

Surfactant Assisted

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Microstructural Transformations of an Amorphous Fe90 Zr10 Alloy Induced by High-Energy Ball-Milling

Materials Science Forum ◽

10.4028/www.scientific.net/msf.510-511.698 ◽

2006 ◽

Vol 510-511 ◽

pp. 698-701

Author(s):

Pyuck Pa Choi ◽

Young Soon Kwon ◽

Ji Soon Kim ◽

Dae Hwan Kwon

Keyword(s):

Ball Milling ◽

Milling Time ◽

High Energy ◽

High Energy Ball Milling ◽

X Ray Diffraction ◽

Scanning Calorimetry ◽

X Ray ◽

Melt Spun ◽

Energy Ball ◽

Induced Crystallization

Mechanically induced crystallization of an amorphous Fe90Zr10 alloy was studied by means of X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Under high-energy ball-milling in an AGO-2 mill, melt-spun Fe90Zr10 ribbons undergo crystallization into BCC α- Fe(Zr). Zr atoms are found to be solved in the Fe(Zr) grains up to a maximum supersaturation of about 3.5 at.% Zr, where it can be presumed that the remaining Zr atoms are segregated in the grainboundaries. The decomposition degree of the amorphous phase increases with increasing milling time and intensity. It is proposed that the observed crystallization is deformation-induced and rather not attribute to local temperature rises during ball-collisions.

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Analysis of the influence of β-TCP particle size on deagglomeration processes

Research Society and Development ◽

10.33448/rsd-v9i4.3067 ◽

2020 ◽

Vol 9 (4) ◽

pp. e175943067

Author(s):

João Augusto Martins Almeida ◽

Bruna Horta Bastos Kuffner ◽

Gilbert Silva ◽

Patrícia Capellato ◽

Daniela Sachs

Keyword(s):

Particle Size ◽

Ball Milling ◽

High Energy ◽

Milling Process ◽

High Energy Ball Milling ◽

X Ray Diffraction ◽

Powder Morphology ◽

Heterogeneous Distribution ◽

X Ray ◽

Energy Ball

There are a class of material widely used in bone tissue repair. This material is calcium phosphate ceramics (CPCs)that can be used on two phases: α and β. However, β-TCP is more used in bone regeneration than α–TCP due to the biocompatible and bioactive properties.In the present work evaluate the influence of these two distinct processes to deagglomeration and the consequence in the particle size of the β-TCP obtained through solid-state reaction. Among all of the routes used in research and industry to reduce the particles size of different materials, the high energy ball milling is one of the most effective, due to the high rotation speed that this process achieves. The deagglomeration through agate mortar is considered a cheaper process when compared with the high energy ball milling. The characterization of both powders, deagglomerated in high energy ball milling and agate mortar, was realized through scanning electron microscopy, to analyze the powder morphology, and laser granulometry, to determine the size of the particles. Also, the forerunner powder was previously submitted to x-ray diffraction to confirm the formation of the β-TCP phase. The analysis through x-ray diffraction confirmed that the phase formed during the calcination process corresponded to the β-TCP. The results obtained after the deagglomeration processes indicated that the morphology was predominantly irregular for both powders. In relation to the granulometry, the deagglomeration performed through agate mortar showed to produce particles with smaller size (11,4µm e 0,9µm) and heterogeneous distribution, while the high energy ball milling process produced particles with larger size (11,4µm a 1,8µm) and higher homogeneity.

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Effect of milling time on the morphology and magnetic properties of SmCo 5 nanoflakes fabricated by surfactant-assisted high-energy ball milling

Journal of Magnetism and Magnetic Materials ◽

10.1016/j.jmmm.2014.09.079 ◽

2015 ◽

Vol 378 ◽

pp. 107-111 ◽

Cited By ~ 11

Author(s):

Nengjun Yu ◽

Minxiang Pan ◽

Pengyue Zhang ◽

Hongliang Ge ◽

Qiong Wu

Keyword(s):

Magnetic Properties ◽

Ball Milling ◽

Milling Time ◽

High Energy ◽

High Energy Ball Milling ◽

Energy Ball ◽

Surfactant Assisted

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Nanocrystalline Diamond Particles Prepared by High-Energy Ball Milling Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.284-287.168 ◽

2013 ◽

Vol 284-287 ◽

pp. 168-172 ◽

Cited By ~ 3

Author(s):

Chii Ruey Lin ◽

Da Hua Wei ◽

Minh Khoa Ben Dao ◽

Ren Jei Chung ◽

Ming Hong Chang

Keyword(s):

Ball Milling ◽

Average Particle Size ◽

Diamond Powder ◽

High Energy ◽

Milling Process ◽

High Energy Ball Milling ◽

Acid Mixture ◽

Average Particle ◽

X Ray ◽

Energy Ball

In this present work, nanodiamond (ND) particles were successfully prepared from commercial micron diamond powder at room temperature by high energy ball milling process using an oscillatory mill (SPEX8000). The size reduction and structural evolutions of the milled samples were investigated as a function of the milling time by means of X-ray diffraction, and field emission scanning electron microscopy. The line broadening technique was used to determine the crystallite size and lattice strain. After 40 h of milling, obtained ND particles possessed uniform shape and 25 nm of average particle size. Also, energy dispersive X-ray results revealed the high purity of ND and demonstrated that the purification process using harsh acid mixture were effective to remove metal and non-diamond carbon impurities produced in milling stage. All results propose a scalable method to preparation ND particles as well as nanocrystalline materials.

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Impact Evaluation of High Energy Ball Milling Homogenization Process in the Phase Distribution of Hydroxyapatite-Barium Titanate Plasma Spray Biocoating

Coatings ◽

10.3390/coatings11060728 ◽

2021 ◽

Vol 11 (6) ◽

pp. 728

Author(s):

Roberto Gómez Batres ◽

Zelma S. Guzmán Escobedo ◽

Karime Carrera Gutiérrez ◽

Irene Leal Berumen ◽

Abel Hurtado Macias ◽

...

Keyword(s):

Barium Titanate ◽

Ball Milling ◽

Plasma Spray ◽

Bonding Strength ◽

Phase Distribution ◽

High Energy ◽

High Energy Ball Milling ◽

X Ray ◽

Nanomechanical Properties ◽

Energy Ball

Air plasma spray technique (APS) is widely used in the biomedical industry for the development of HA-based biocoatings. The present study focuses on the influence of powder homogenization treatment by high-energy ball milling (HEBM) in developing a novel hydroxyapatite-barium titanate (HA/BT) composite coating deposited by APS; in order to compare the impact of the milling process, powders were homogenized by mechanical stirring homogenization (MSH) too. For the two-homogenization process, three weight percent ratios were studied; 10%, 30%, and 50% w/w of BT in the HA matrix. The phase and crystallite size were analyzed by X-ray diffraction patterns (XRD); the BT-phase distribution in the coating was analyzed by backscattered electron image (BSE) with a scanning electron microscope (SEM); the energy-dispersive X-ray spectroscopy (EDS) analysis was used to determinate the Ca/P molar ratio of the coatings, the degree of adhesion (bonding strength) of coatings was determinate by pull-out test according to ASTM C633, and finally the nanomechanical properties was determinate by nanoindentation. In the results, the HEBM powder processing shows better efficiency in phase distribution, being the 30% (w/w) of BT in HA matrix that promotes the best bonding strength performance and failure type conduct (cohesive-type), on the other hand HEBM powder treatment promotes a slightly greater crystal phase stability and crystal shrank conduct against MSH; the HEBM promotes a better behavior in the nanomechanical properties of (i) adhesive strength, (ii) cohesive/adhesive failure-type, (iii) stiffness, (iv) elastic modulus, and (v) hardness properties.

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