A Study on Characteristics of TiH2-Al-Nb Alloyed Powder During High Energy Ball Milling

2011 ◽  
Vol 688 ◽  
pp. 1-5
Author(s):  
Hua Chen ◽  
Tian Yu Zhang ◽  
X.Y Lu ◽  
Su Qiu Jia ◽  
Zhi Long Chai
Keyword(s):  
Ball Milling ◽  
Metastable Phase ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Morphology Evolution ◽  
System Alloy ◽  
Forming Process ◽  
Mixed Powder ◽  
Tial Intermetallics ◽  
Energy Ball

In this paper, TiH2-47Al-5Nb (at.%) and TiH2-47Al-7Nb(at.%) alloys were mixed and synthesized using TiH2, Al and Nb powders. The composition and morphology evolution of the mixed powder were systematically investigated during high energy ball milling. The results show obvious that structure change of the particle during milling, and amorphous, TiAl, Ti3Al and Ti2Al phases at nanoscale are formed. The addition of Nb shows an active influence on the decomposition of TiH2and formation of TiAl-intermetallics. Compare with Ti-Al system alloy, the forming process of TiAl-intermetallics for TiH2-Al-Nb system alloy is different and slower. Ti2Al metastable phase formed after ball milling for 15 h in our experiments.

Preparation of C/Cu Composite Powders by High-Energy Ball-Milling

2011 ◽  
Vol 319-320 ◽  
pp. 61-63 ◽  
Author(s):  
Xiu Yan Guo ◽  
Guo Jin Ma ◽  
Shi Kun Xie ◽  
Rong Xi Yi ◽  
Zhi Gao
Keyword(s):  
Ball Milling ◽  
Graphite Powder ◽  
High Energy ◽  
Lattice Parameter ◽  
High Energy Ball Milling ◽  
X Ray Diffraction ◽  
Composite Powders ◽  
Mixed Powder ◽  
X Ray ◽  
Energy Ball

Cu-4% mixed-powder consisting of rough copper powder and graphite powder was separately mechanical alloyed by high-energy ball milling. The phases and micrograph of these powders were determined by X-ray diffraction and scanning electron microscopy (SEM). The results show an increase in the lattice parameter of copper with milling times, up to a saturation value of about 24h; There was an absence of graphite reflections from X-ray diffractograms after longer milling times.

scholarly journals Влияние способа получения на аморфно-кристаллический переход в сплаве Fe-=SUB=-84-=/SUB=-B-=SUB=-16-=/SUB=-

2019 ◽  
Vol 89 (12) ◽  
pp. 1903
Author(s):  
Д.Ю. Ковалев ◽  
Н.Ф. Шкодич ◽  
С.Г. Вадченко ◽  
А.С. Рогачев ◽  
А.С. Аронин
Keyword(s):  
Amorphous Alloy ◽  
Ball Milling ◽  
Structural Changes ◽  
Metastable Phase ◽  
Diffraction Method ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Time Resolved ◽  
Short Period ◽  
Energy Ball

The amorphous-crystalline transitions in Fe84B16 alloy received by spinning melt and high-energy ball milling have been studied. Using time-resolved X-ray diffraction method, it has been shown that the kinetics of transition in crystalline state depends on the method of metastable alloy production. In amorphous alloy Fe84B16, received by spinning melt, the crystallization process goes on for a short period of time not exceeding 1 s and is accompanied by formation of eutectic α-Fe-Fe3B. At a temperature of more than 600 ℃ metastable phase Fe3B transition into Fe2B and α-Fe. In amorphous alloy Fe84B16, received by high-energy ball milling, structural changes occur within 4-8 s and transition in state with perfect crystalline structure associated with growth of nanoscale crystallites.

Solid state reactions between Pd and Si induced by high energy ball milling

1994 ◽  
Vol 9 (1) ◽  
pp. 53-60 ◽  
Author(s):  
D.L. Zhang ◽  
T.B. Massalski
Keyword(s):  
Solid State ◽  
Ball Milling ◽  
Amorphous Phase ◽  
Metastable Phase ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Solid State Reactions ◽  
Scanning Calorimetry ◽  
Energy Ball ◽  
Si Content

Solid state reactions induced by high energy ball milling between Pd and Si have been studied. X-ray diffractometry and differential scanning calorimetry have been used to characterize the resulting phases. During milling, Pd and Si react by diffusion to form different phases depending on the Si content in the starting mixture. With a low Si content of 19 at. %, an amorphous phase forms of the same composition. On continued milling, this amorphous phase partially crystallizes into Pd9Si2 and Pd2Si compounds. With the Si content equal to or higher than 33 at. %, no amorphous phases were observed. Instead, the Pd2Si phase is produced. For powder composition corresponding to the stoichiometric compound Pd2Si (33 at. % Si), the Pd2Si forms and remains stable during further milling. With Si content equal to or higher than 50 at. %, the initially produced Pd2Si is destabilized by a reaction with the remaining Si to form PdSi, which is a metastable phase at the temperature of ball milling. It is very unlikely that an amorphous phase of a composition equal to or higher than 33 at. % Si could be produced by ball milling in the Pd-Si system. This is because the Pd2Si phase forms very easily through the reaction between Pd and Si, and this reaction competes effectively with glass formation.

Preparation of C/Cu Composite Powders by High-Energy Ball Milling

2011 ◽  
Vol 121-126 ◽  
pp. 1049-1052
Author(s):  
Xiu Yan Guo ◽  
Guo Jin Ma ◽  
Shi Kun Xie ◽  
Rong Xi Yi
Keyword(s):  
Ball Milling ◽  
Graphite Powder ◽  
High Energy ◽  
Lattice Parameter ◽  
High Energy Ball Milling ◽  
X Ray Diffraction ◽  
Composite Powders ◽  
Mixed Powder ◽  
X Ray ◽  
Energy Ball

Cu-4%C mixed-powder consisting of rough copper powder and graphite powder was separately mechanical alloyed by high energy ball milling. The phases and micrograph of these powders were determined by X-ray diffraction and scanning electron microscopy (SEM). The results show that increase of the lattice parameter of copper with milling times, up to a saturation value of about 24h; The absence of graphite reflections in X-ray diffract grams for longer milling times.

High-Energy Ball Milling of Ni-Ti and Ni-Ti-Nb Powders

2006 ◽  
Vol 530-531 ◽  
pp. 211-216 ◽  
Author(s):  
C.B. Martins ◽  
Gilbert Silva ◽  
Bruno Bacci Fernandes ◽  
Erika Coaglia Trindade Ramos ◽  
D.A. Mardegan ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Ball Milling ◽  
Metastable Phase ◽  
High Energy ◽  
Milling Process ◽  
High Energy Ball Milling ◽  
Heat Treated ◽  
Niti Phase ◽  
Energy Ball ◽  
Two Phases

This work reports on the preparation of Ni-50Ti and Ni-40Ti-10Nb and Ni-30Ti- 20Nb (at.%) powders by high-energy ball milling and subsequent heat treatment. The milling process was carried out at room temperature in a planetary ball mill under Ar atmosphere. The as-milled powders were than heat-treated at 900oC for 1h under Ar atmosphere. X-ray diffraction (XRD), scanning electron microscopy (SEM), and microanalysis via energy dispersive spectroscopy (EDS) were used to characterize the milled and heat-treated powders. A metastable phase was initially formed in Ni-50Ti and Ni-40Ti-10Nb powders milled for 1h. Following the ball milling, the B2-NiTi compound was formed in these powder mixtures. The disordering of the B2-NiTi compound occurred owing the internal lattice strain after milling for 30h. Two phases were identified in Ni-50Ti and Ni-40Ti-10Nb powders milled for 60h: the metastable phase previously reported, and an amorphous phase. In Ni-30Ti-20Nb powders, it was noted the presence of an amorphous halo only. A structural relaxation of the B2-NiTi phase occurred in heat-treated Ni-50Ti, Ni-40Ti-10Nb, and Ni-30Ti-20Nb powders. A small amount of Ni3Ti and NiTi2 was also formed after heat treatment at 900oC for 1h, and an iron contamination lower than 2at.% was found.

scholarly journals Discovering a new MgH2 metastable phase

RSC Advances ◽  
2018 ◽  
Vol 8 (56) ◽  
pp. 32003-32008 ◽  
Author(s):  
Mohamed Sherif El-Eskandarany ◽  
Mohammad Banyan ◽  
Fahad Al-Ajmi
Keyword(s):  
Phase Transformation ◽  
Cold Rolling ◽  
Ball Milling ◽  
Metastable Phase ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Energy Ball ◽  
Cyclic Phase

Effect of mechanically-induced cold-rolling followed by high energy ball milling on cyclic phase transformation.

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

Coatings ◽  
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.

scholarly journals Effect of the route and sintering time in the microstructure of pure aluminum prepared by high energy ball milling

2021 ◽  
Vol 27 (S1) ◽  
pp. 3294-3296
Author(s):  
José Mendoza ◽  
C. Carreño-Gallardo ◽  
I. Estrada-Guel ◽  
C.G. Garay-Reyes ◽  
M.A. Ruiz-Esparza-Rodriguez ◽  
...  
Keyword(s):  
Ball Milling ◽  
Pure Aluminum ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Sintering Time ◽  
Energy Ball
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