Contamination during the high-energy milling of atomized copper powder and its effects on spark plasma sintering

Cipolloni, Giulia; Pellizzari, M.; Molinari, A.; Hebda, Marek; Zadra, M.

doi:10.1016/j.powtec.2015.01.063

Cited by 35 publications

(30 citation statements)

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“…In powder H, peak 1 at 187°C is observed in SPS but not in TGA and is probably due to humidity absorbed by the powder [23]. The heat treatment in TGA carried out after the application of vacuum in the TG chamber followed by a flux of argon reduces the formation of humidity, thus eliminating this peak.…”

Section: Spark Plasma Sinteringmentioning

confidence: 95%

“…This is in agreement with the drop in the carbon content of this powder when it is sintered: in sample H, it decreases from 0401 to 0346 wt.%, as reported in Table 8, while it remains almost unvaried in powder L. Peaks 2 and 3 being present in powder H but missing in powder L are explained by considering the different particle sizes of the two powders. Powder H is so fine that an anticipated decomposition of stearic acid is observed, as this lubricant is much finer as well and therefore much more reactive [23].…”

Section: Spark Plasma Sinteringmentioning

confidence: 99%

See 1 more Smart Citation

Spark plasma sintering behaviour of copper powders having different particle sizes and oxygen contents

et al. 2016

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Section: Spark Plasma Sinteringmentioning

confidence: 95%

Section: Spark Plasma Sinteringmentioning

confidence: 99%

Spark plasma sintering behaviour of copper powders having different particle sizes and oxygen contents

et al. 2016

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“…On the other hand, if the sintering process is carried out improperly, the addition of silicon carbide may decrease impact strength and elongation, and it may significantly reduce wear resistance of sintered materials. The SPS method is a short time consolidation technique (the sintering time is shorter than in the conventional PM process and heating/cooling rates are higher), which also allows for synthesis of various materials (metals, ceramics and composites) [15][16][17][18][19][20]. Moreover, with the use of the SPS it is possible to obtain materials with a porosity below 1% which significantly increases corrosion resistance and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Spark Plasma Sintering of Low Alloy Steel Modified with Silicon Carbide

Hebda¹,

Dębecka²,

Miernik³

et al. 2016

Archives of Metallurgy and Materials

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The influence of adding different amounts of silicon carbide on the properties (density, transverse rupture strength, microhardness and corrosion resistance) and microstructure of low alloy steel was investigated. Samples were prepared by mechanical alloying (MA) process and sintered by spark plasma sintering (SPS) technique. After the SPS process, half of each of obtained samples was heat-treated in a vacuum furnace. The results show that the high-density materials have been achieved. Homogeneous and fine microstructure was obtained. The heat treatment that followed the SPS process resulted in an increase in the mechanical and plastic properties of samples with the addition 1wt. % of silicon carbide. The investigated compositions containing 1 wt.% of SiC had better corrosion resistance than samples with 3 wt.% of silicon carbide addition. Moreover, corrosion resistance of the samples with 1 wt.% of SiC can further be improved by applying heat treatment.

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“…Compared with conventional sintering methods, the spark plasma sintering (SPS) can save energy and time, improve the equipment efficiency. The material made by SPS have grains with sizes in narrow ranges and excellent mechanical properties [13][14][15][16][17][18] . In our research, we utilized two different routes of SPS to prepare two consolidated copper samples from a gas atomized copper powder with a purity of 99.5% and particle sizes smaller than 75 μm.…”

Section: Introductionmentioning

confidence: 99%