• Nanostructured iron rich (Fe-Co)70 Mn10 Ti10 B10

    The EDX analysis of the sample milled at 100 h is presented in Fig. 2; the elemental analysis shows the appearance of the constituent elements peaks. The contamination of oxygen is also observed in the result; this is due to the powder handling at

  • Raman spectroscopy sheds new light on TiC formation during

    A magneto ball mill was used to mill titanium and carbon elemental powder mixtures with compositions of Ti 50 C 50 and Ti 60 C 40 under a helium atmosphere. Previous studies on the milling of titanium and carbon powder mixtures have reported a sudden increase in the temperature of the milling vial, which occurs after a specific milling interval, referred to as t ig

  • Cited by: 83
  • About ball-milled powder XRD data? ResearchGate

    Sample 2, a red line, shows ball milled alumina powder. The xrd graph shows that the ball-milled alumina powder has a lower intensity of the main peaks and

  • Synthesis of hydroxyapatite from eggshell powders through

    No peaks corresponding to the starting materials were found in the powders milled for 5 and 10 h followed by heat treatment at 1000 °C for 1 h. (3) The final products composed entirely of pure HA crystals or biphasic calcium phosphate (HA + β-TCP crystals) can easily be prepared by using DCPD and eggshell powders after 5 and 10 h of ball

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  • Thermal analysis and morphology of the ball-milled Ti-Ni

    Fig. 4 shows the XRD analysis after annealing of the 8 h milled TiNi powder compacts at 900 °C. Three major peaks were detected and were successfully identified as Ti 2 Ni, TiNi, Ti-rich Ni (solid solution) and small peak of the Ni 3 Ti phase. The Ni 3 Ti and Ti 2 Ni are undesirable phases inhibiting the B2 ↔ B19′ shape memory phase transformation in TiNi alloy and fracture

  • Author: A.S. Bolokang, M.N. Mathabathe, C. Mathebula, C.N. Machio
  • Synthesis of NiAl-WC composite by the thermal explosion of

    The XRD result of 5 h milled powder after the thermal explosion process is shown in Fig. 2b. As shown, all peaks of nickel, aluminum, carbon, tungsten, and W 2 C disappeared after the thermal explosion process and new peaks related to NiAl, WC 1-x, and WC formed.

  • Author: Shu-Rong Yan, Majid Zarezadeh Mehrizi, Loke Kok Foong
  • STRUCTURE AND PROPERTIES OF Cu, Ni AND Fe POWDERS

    The microstructure of Cu is refined during ball milling. The grain size of starting Cu powders ranges between 10 and 20 pm. When the powders are milled at low velocities (200 rpm), the powders

  • Materials Science Forum Vols. 534-536 p. 6 Scientific.Net

    Nanocrystalline zinc ferrite, ZnFe2O4 powders were successfully synthesized only by milling for 30 hours. The X-ray diffraction spectrum of the as-milled powders (without heating) showed twelve ZnFe2O4 peaks and four weak peaks of coexisting unreacted Fe2O3. The crystallite size of the mechanochemicallysynthesized ZnFe2O4 was 26.3 nm.

  • Structural study of the Sn/Ge interface of highly milled

    @article{osti_121192, title = {Investigation of the interfaces of silicon-silicon dioxide thin films and ball-milled tin-germanium (silicon) powders using x-ray techniques}, author = {Jayanetti, J K.D.S.}, abstractNote = {The Si/So{sub 2} thin film interface and Sn/Ge(Si) interfaces in ballmilled Sn-Ge(Si) powders are investigated using x-ray reflectivity and EXAFS, respectively.

  • STUDIES OF CRYSTALLITE SIZE AND LATTICE STRAIN IN 2O3

    powders milled for different times; 7, 12, 15, 21, 30, 38 and 45 h. For appearing line broadening increase with milling time in XRD pattern, typical first peak lines of Al-Al 2 O 3 powders milled for different times are plotted separately. Figure 2 shows profiles plotting for only the first peak (P1), of the milled powders for different times.

  • File Size: 921KB
  • STUDIES OF CRYSTALLITE SIZE AND LATTICE STRAIN IN

    powders milled for different times; 7, 12, 15, 21, 30, 38 and 45 h. For appearing line broadening increase with milling time in XRD pattern, typical first peak lines of Al-Al 2 O 3 powders milled for different times are plotted separately. Figure 2 shows profiles plotting for only the first peak (P1), of the milled powders for different times.

  • Structural study of the Sn/Ge interface of highly milled

    @article{osti_121192, title = {Investigation of the interfaces of silicon-silicon dioxide thin films and ball-milled tin-germanium (silicon) powders using x-ray techniques}, author = {Jayanetti, J K.D.S.}, abstractNote = {The Si/So{sub 2} thin film interface and Sn/Ge(Si) interfaces in ballmilled Sn-Ge(Si) powders are investigated using x-ray reflectivity and EXAFS, respectively.

  • Calcium Titanate from Food Waste: Combustion Synthesis

    Calcium titanate (CaTiO 3 ) was combustion synthesized from a calcium source of waste duck eggshell, anatase titanium dioxide (A-TiO 2 ), and magnesium (Mg). The eggshell and A-TiO 2 were milled for 30 min in either a high-energy planetary mill or a conventional ball mill. These powders were then separately mixed with Mg in a ball mill.

  • Influence of Milling Media on the Mechanical Alloyed W-0.5

    This is particularly true for the powders milled in IPA media and confirmed by Figure 2 which shows that powders MA’d in IPA have more intense WC peaks than the others. Probably, increment of the WC particles might decrease density of the MA’d W-0.5 wt.% Ti powders [ 17,18,25 ].

  • Nanocrystalline Al Composites from Powder Milled under

    The powders milled in vacuum at 500 rpm for 5 h before and after sintering (MA V 500-5 and MA V 500-5 S, resp.) were analysed by XRD to determine and quantify the phases formed (Figure 5(a)). The XRD patterns of the as-milled powders show only Al peaks.

  • Investigation of typical properties of nanocrystalline

    Iron powders were prepared using mechanical milling on the Fritsch P-6 planetary ball mill, with milling times in the range of 1–30 h. The iron powders obtained have the following typical characteristics: Morphology, crystal structure, particle size, porosity and saturation magnetization, coercivity change over

  • Application of a novel flash-milling procedure for

    Milling for 270 s shows very broad reflection peaks with a diminished intensity as a consequence of a further refined microstructure and an increased amount of amorphous material, which makes it difficult to extract more conclusions beyond the coexistence of the ɛ-, γ 2 and τ-MnAl phases in these as-milled powders.

  • Characterization of Mechanically Alloyed Nanocrystalline

    Three overlapping exothermic peaks are observed at temperature near 375, 453, and 638°C, respectively, in the case of powder milled for 10 h. The low-temperature peaks with total enthalpy of 109.46 j/g correspond to the ordering of disordered Fe(Al) solid solution to form FeAl(B2) intermetallic by mechanisms of atomic-scale interchange and the

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  • Reviews: 1.5K
  • A Profile-Fitting Procedure for Analysis of Broadened X

    fluorite milled powders Fourier analysis (Warren & Averbach and Vogel, Haase & Hosemann methods) has shown that lattice disorder is due to disloca- study the experimental peaks are replaced by the

  • RESEARCH Open Access Effect of different sizes of balls on

    balls. In the samples milled by 5-mm balls, the intensity of the peaks related to both Fe and Cu is not as much significant as the previous series. In other words, there is a critical value for ball diameter. At critical diameter, a perfect balance between kinetic energy, number of effect-ive impacts, and amount of entrapped powders occurs.

  • Bulk Mn-Al-C permanent magnets prepared by various

    Figure2shows the XRD patterns of the as-milled and heat-treated powders. XRD pattern of the as-milled powder shows peaks mainly arising from the τ-phase along with smaller peaks from the β-and γ 2-phases. Broadening of the peaks is caused by the decreased particle/grain size and the stress induced during the milling process. The lower

  • Effect of ball milling conditions on the microstructure

    Clear exothermic and endothermic peaks appeared in the cooling and heating curves, respectively, in DSC curves of 20 hr and 30 hr milled Ti-Ni powders. On the other hand, in DSC curves of 1 hr, 10 hrs, 50 hrs and 100 hrs, the thermal peaks were almost discernible. The optimum ball milling time for fabricating Ti-Ni alloy powders was 30 hrs.

  • Effect of Reactive Ball Milling Time on the Hydrogenation

    powders were prepared by high-energy reactive ball milling of pure Mg powders under 50 bar of a hydrogen gas atmosphere. The powders obtained after 200 h of milling were doped with 7 wt% of Mn 3.6 Ti 2.4 powders and then ball milled 50 h, using a high energy ball mill. The as-milled MgH 2 /7Mn 3.6 Ti 2.4 nanocomposite

  • RESEARCH Open Access Effect of different sizes of balls on

    balls. In the samples milled by 5-mm balls, the intensity of the peaks related to both Fe and Cu is not as much significant as the previous series. In other words, there is a critical value for ball diameter. At critical diameter, a perfect balance between kinetic energy, number of effect-ive impacts, and amount of entrapped powders occurs.

  • Bulk Mn-Al-C permanent magnets prepared by various

    Figure2shows the XRD patterns of the as-milled and heat-treated powders. XRD pattern of the as-milled powder shows peaks mainly arising from the τ-phase along with smaller peaks from the β-and γ 2-phases. Broadening of the peaks is caused by the decreased particle/grain size and the stress induced during the milling process. The lower

  • Effect of ball milling conditions on the microstructure

    Clear exothermic and endothermic peaks appeared in the cooling and heating curves, respectively, in DSC curves of 20 hr and 30 hr milled Ti-Ni powders. On the other hand, in DSC curves of 1 hr, 10 hrs, 50 hrs and 100 hrs, the thermal peaks were almost discernible. The optimum ball milling time for fabricating Ti-Ni alloy powders was 30 hrs.

  • Effect of Reactive Ball Milling Time on the Hydrogenation

    powders were prepared by high-energy reactive ball milling of pure Mg powders under 50 bar of a hydrogen gas atmosphere. The powders obtained after 200 h of milling were doped with 7 wt% of Mn 3.6 Ti 2.4 powders and then ball milled 50 h, using a high energy ball mill. The as-milled MgH 2 /7Mn 3.6 Ti 2.4 nanocomposite

  • Characterization of high-energy milled alumina powders

    The X-ray diffraction of the high-energy milled alumina powders, Fig. 1, showed evident broadening of the a-alumina phase peaks. For brittle materials, one may consider the broadening due to the decrease of crystallite size, as a result of milling.

  • Structure and catalytic behaviour of CuO–CeO2 prepared by

    For powders without milling (0 h milling), i.e. by mixing the oxide powders, the reduction of (CuO) 0.5 (CeO 2) 0.5 is characterized by rather combined three peaks (α, β, and γ) in the range of 220–420°C and one broad ϕ peak in the range of 700–880°C.

  • The Glassy Structure Formation and Phase Evolution in

    powders, where the XRD peaks broadened with progress in milling time. In comparison with 1-h milled Al 86Ni 8Y 6 powder, 20-h milled Al 86Ni 8Y 6 powder exhibits a severe peak broad-ening as shown in Fig. 1(a). Beyond 20 h of milling, XRD peak broadening (Fig. 1a) slowed down attributed to the difficulties in generating any more

  • Microstructure and mechanical properties of aluminium

    The powder mixture of Al alloy and 1.0 vol.% GNSs was milled in a planetary ball mill, which was carried out in a 500 ml stainless steel jar. The confined powders were firstly ball milled at 180 rpm for 0.5 h for pre-mixing, and then at 250 rpm for the following 20 h under argon atmosphere. Samples were taken out at 2, 5, 10, 15 and

  • Fabrication and mechanical properties of selftoughening

    The powder mixtures were ball-milled at 250 rpm for 12 h using WC balls and ethanol as the milling media. The mass ratio among powders, balls, and ethanol was 1:10:1. The ball-milled powder mixtures were dried in a rotary evaporator under vacuum condition, and then charged into the graphite die coated with a

  • Why do XRD peaks of wet milled Polymer and Al2O3 compoite

    Why do XRD peaks of wet milled Polymer and Al2O3 compoite disapears? I just prepared a polymer alumina composite hybrid at 0.2: 0.8 ratio by wet milling method and coat on copper foil.

  • Formation of a TiB2-Reinforced Copper-Based Composite by

    DTA run, 30 to 40 mg of powders were hermetically sealed has been also observed in other alloy systems.[8,9] After 64.8 in a ceramic pan to allow a temperature excursion to 1223 K. ks of milling, new diffraction peaks appeared (Figure 1), After mechanical alloying, the ball-milled powders were determined to be a result of the in-situformation

  • CiteSeerX — Effect of High-Energy Ball-Milling and TiB2

    High-energy ball-milling resulted in refinement of TiB2 particles. XRD patterns of milled TiB2 powders indicated broader TiB2 peaks with decreased intensities. After sintering at 950 for 5min using the raw and milled TiB2 mixture powders, the sintered density decreased with increasing TiB2 content regardless of milling of TiB2.

  • Mechanical milling assisted by electrical discharge Nature

    Sep 12, 2002· The associated XRD pattern showed only Ti peaks, with a slight broadening in comparison with peaks associated with non-milled Ti powder . This indicates that the Ti powder

  • Magnetic properties of ball-milled SrFe12O19 particles

    Results. X-ray powder diffraction investigations provide information about the crystal structure and phase purity of commercially un-milled/milled SrFe 12 O 19 powders, before and after the SPS consolidation. Before SPS all the samples appear to be single phase, independent of milling time as seen in Fig. 1a.However, after SPS consolidation an additional phase was detected as