Effects of milling time and sintering temperature on structural evolution, densification behavior and properties of a W-20wt.%Cu alloy

Li, Chenguang; Zhou, Yihan; Xie, Yuehuang; Zhou, Dengshan; Zhang, Deliang

doi:10.1016/j.jallcom.2017.10.081

Cited by 67 publications

(16 citation statements)

References 19 publications

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“…Data Areas of Application.Titanium alloy powder can be used in powder metallurgy for spark plasma sintering [2], [4].Titanium alloy powder can also be utilized as reinforcement in composite fabrication [5].Nanoparticles of titanium can be used in the development of nano-lubricants to improve tribological properties [6], [7].It can also be applied in the improvement of coatings for automobile applications [8], [9].…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

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Data showing the effects of disc milling time on the composition and morphological transformation of (α+β) titanium alloy (Ti–6Al–2Sn–2Mo–2Cr–2Zr-0.25Si) grade

2019

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In powder metallurgy, dry mechanical milling process is an effective technique employed in the reduction of solid materials into the desired size in the fabrication of materials or components from metal powders for various applications. However, the milling operation introduces changes in the size and shape as well as the elemental or chemical composition of the milled substance. These changes introduced after milling requires critical analyses as the performance and efficiency of fabricated components depend so much on the size, shape and chemical composition of the powders. In this data, the effects of vibratory disc milling on the morphological transformation and elemental composition of titanium alloy powder were observed and analyzed by Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). The as received titanium alloy powder was subjected to dry mechanical milling machine rated 380V/50Hz at 940 rpm. Milling time of 2, 4, 6, 8 and 10 mins were adopted in this data collection. SEM and EDS analyses revealed that milling transformed the spherical shaped powders into plate-like shapes. This deformation in the shape of the powder increased with increase in milling time. Also, the oxygen content of the powder fluctuated as the milling time increased.

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Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

“…The data give an idea of the mechanism of deformation involved in mechanical milling of metal alloy [1], [2].…”

mentioning

confidence: 99%

Data showing the effects of disc milling time on the composition and morphological transformation of (α+β) titanium alloy (Ti–6Al–2Sn–2Mo–2Cr–2Zr-0.25Si) grade

2019

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“…The addition of Ni, Fe, and Co results in low electrical and thermal properties. From various experimental investigations, it has been found that the starting particle size and uniformity of the tungsten and copper powders significantly affect the magnitude of the sintering temperature and sinterability, and improve the final properties of the W-Cu composites [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, temperature and powder particle size are two main factors that determine sinterability. High-energy mechanical milling of tungsten and copper powders to produce fine or ultra-fine particles resulted in high relative density and lower sintering temperatures [3,20]. Processing techniques such as high-pressure sintering, microwave sintering, dynamic consolidation, and low-temperature infiltration in supergravity fields have resulted in higher density, improved mechanical properties, and a significant reduction in processing time [2,3,15,[21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nano Copper on the Densification of Spark Plasma Sintered W–Cu Composites

et al. 2021

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In the present work, nano Cu (0, 5, 10, 15, 20, 25 wt.%) was added to W, and W–Cu composites were fabricated using the spark plasma sintering (S.P.S.) technique. The densification, microstructural evolution, tensile strength, micro-hardness, and electrical conductivity of the W–Cu composite samples were evaluated. It was observed that increasing the copper content resulted in increasing the relative sintered density, with the highest being 82.26% in the W75% + Cu25% composite. The XRD phase analysis indicated that there was no evidence of intermetallic phases. The highest ultimate (tensile) strength, micro-hardness, and electrical conductivity obtained was 415 MPa, 341.44 HV0.1, and 28.2% IACS, respectively, for a sample containing 25 wt.% nano-copper. Fractography of the tensile tested samples revealed a mixed-mode of fracture. As anticipated, increasing the nano-copper content in the samples resulted in increased electrical conductivity.

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“…As a result of high energy mechanical milling, the powders are crushed, the surface areas of the milled powders are increased, the crystal lattices are destroyed and the material is amorphized [9]. HEMM technique has been widely and effectively used to produce alloys with a high density [10,11]. Rare earth elements have been called the "vitamin" of metals, the addition of rare earths to the metals can greatly affect the properties of material [12,13].…”

Section: Introductionmentioning

confidence: 99%

Effects of Rare Earth Ce on the Brazing Performance of High Energy Mechanical Milling Cu-Based Alloy Powder

Luo

Wang

et al. 2018

Metals

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CuSn and TiH 2 powders were milled by high energy mechanical milling to prepare Cu-based alloy powder for brazing diamond, and a small amount of rare earth Ce was added to improve the brazing performance. The effects of Ce on the brazing performance were studied by investigating transverse rupture strength, microstructure of brazing layer, climbing height along the diamond, and wear characteristics of the diamonds. The results indicated that the addition of Ce could effectively improve the transverse rupture strength, the transverse rupture strength reached the maximum value 475 MPa when the Ce content was 0.75 wt %. Rare earth Ce could promote the refinement of Cu 6 Sn 5 and CuTi 2 grains in the brazing alloy, which effectively reduced the formation and propagation of cracks. The wettability of the Cu-based alloy was also improved by adding rare earth Ce, and the capillary force pulled the molten alloy up the diamonds and formed a hill-like structure around diamonds. The diamonds brazed with Cu-based alloy containing 0.75 wt % Ce mainly led to integrity, micro-fracture, fracture and rubdown during the grinding process; pull-out of diamonds did not happen easily owing to the presence of strong adhesion between the diamonds and Cu-based alloy.

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Effects of milling time and sintering temperature on structural evolution, densification behavior and properties of a W-20wt.%Cu alloy

Cited by 67 publications

References 19 publications

Data showing the effects of disc milling time on the composition and morphological transformation of (α+β) titanium alloy (Ti–6Al–2Sn–2Mo–2Cr–2Zr-0.25Si) grade

Data showing the effects of disc milling time on the composition and morphological transformation of (α+β) titanium alloy (Ti–6Al–2Sn–2Mo–2Cr–2Zr-0.25Si) grade

Effect of Nano Copper on the Densification of Spark Plasma Sintered W–Cu Composites

Effects of Rare Earth Ce on the Brazing Performance of High Energy Mechanical Milling Cu-Based Alloy Powder

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