effect of ball-milling and graphene contents on the

effect of ball-milling and graphene contents on the

Jan 15, 2017 The magnified images indicate that the GO nanosheets are gradually dispersed into the copper powders with increasing the ball-milling time. When the ball-milling time is relatively short (for 1 h), the entangled GO nanosheets clusters are adhered to the surfaces of the copper powders (Fig. 3b). When the ball-milling time increases to 3 h, the number of entangled GO nanosheets clusters

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investigation of phase composition and nanoscale

investigation of phase composition and nanoscale

As the milling time increases, the diffracted peaks of Mg2Cu and Cu gradually disappear, and only a broad halo peak can be observed in the X-ray diffraction pattern of the final 18-h milled sample. As for this halo peak, lots of previous studies suggested that it originated from the amorphous phase formed during the ball milling

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effect of ball-milling time on the characterization and

effect of ball-milling time on the characterization and

Aug 26, 2016 It is clear that both intensity and the broadness of (00 l) peaks increase as the ball-milling time increases, as shown in the inset of Fig. 1 for (005) peak. This is probably due to the increase of planar defects (anti-phase boundaries) along c-axis, arising from the embedded nano scale particles in the Y-123 matrix phase

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influence of high-energy ball milling on structural

influence of high-energy ball milling on structural

Dec 02, 2019 With increases of milling time, the intensities of the parent oxide peaks depressed gradually and the formation of MgTi 2 O 5 phase was observed. When the milling time reached at 30 h, all the parent oxide peaks disappeared completely resulting in high-intense diffraction peak of pure MTO phase with small significance of MgTiO 3 and MgTi 2 O 5

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preparation of vo2 (m) nanoparticles with exemplary

preparation of vo2 (m) nanoparticles with exemplary

As shown in Fig. 7a, the diffraction intensity of (001) B, (110) B, and (200) B peaks decrease, the peaks of (102) A and (200) M appear when the ball milling time is 5 min. As the milling time increases to 30 min, the peaks intensity of VO 2 (B) gradually decreases, while the peak intensity of VO 2 (A) and VO 2 (M) gradually increases

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the effect of mg content and milling time on the solid

the effect of mg content and milling time on the solid

Mar 01, 2021 For the Ti 100-x Mg x (x = 10, 15, 20-wt.%) composite powders, the intensity of the Mg peaks decreases during the successive ball-milling time intervals, Full width at half maximum values of the Ti peaks increased followed by the individual peak positions that make a shift towards the lower angles of diffraction; and after milling for 32 h, the

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effects of intensive grinding on the dissolution of

effects of intensive grinding on the dissolution of

Jan 01, 2009 This suggests that the impact stress which is predominant in planetary ball milling causes compactness of the particles, especially in the range of finest grains, as grinding time and ball to ore ratio increases. It is likely that the practical limit to grinding for enhanced dissolution is the point at which the particles re-aggregate

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solid-state transformation in nanocrystalline ti induced

solid-state transformation in nanocrystalline ti induced

May 31, 2010 The evolution of the crystal structure in the milled powders was investigated by XRD. The X-ray patterns of powders milled at 800 rpm for 4, 8, 16, 24 and 30 h are shown in Fig. 1.It is observed in Fig. 1 that the diffraction peaks of Ti are slightly displaced towards higher angles and their intensities decreased as the milling duration increases, with exception of the first peak which becomes

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comparative study on the characteristics of ball-milled

comparative study on the characteristics of ball-milled

Dec 10, 2015 High-energy mill (HEM) has a wide application in material preparation, activation and synthesis. In the present study, fly ash was selected to be milled by HEM under the speed of 700 rpm and the ball-to-powder ratio of 10:1 by weight, but varied periods of milling time. The changes in physical and morphology properties of the milled fly ash were determined using BET analysis and scanning

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comparative study of spex and planetary milling methods

comparative study of spex and planetary milling methods

Apr 01, 2018 The objective of the present work is the comparison of two common milling methods for the production of complex metallic alloy nanoparticles. -Al 12 Mg 17 nanoparticles were fabricated using both a planetary ball mill and a SPEX mill. The produced nanoparticles have been compared on the basis of the phase and microstructural characterisations by means of X-ray diffraction (XRD) and field

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ball milled si-w alloys: part i. microstructural and phase

ball milled si-w alloys: part i. microstructural and phase

Nov 30, 2019 Figure 1 shows powder XRD patterns of ball milled Si 100-x W x (x = 15, 20, 25, 30) alloys at different milling times. XRD peaks of known phases are indicated. With increasing milling time, crystalline Si peaks disappear and amorphous Si is formed. After 4h milling time, no crystalline Si peaks could be observed

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