Modelling of swelling of Fe–Cu compacts sintered at temperatures above the copper melting point

Zhang, Zongyin; Sandström, Rolf; Wang, Lingna

doi:10.1016/j.jmatprotec.2004.03.025

Cited by 20 publications

(9 citation statements)

References 10 publications

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“…The obtained results of measurements showed that the introduction of iron and steel particles decreased density of materials, which oscillated around 8 g/cm 3 and was about 92 % of theoretical. Similar results were also received by other researchers [3,4]. The examinations showed that, the introduction of iron and especially steel particles into the copper matrix increased the hardness of the materials, however, these changes were slight (24 and 44 % for iron and steel particles, respectively, in comparison to sintered copper).…”

Section: Density Hardness and Electrical Conductivity Measurementssupporting

confidence: 87%

“…Therefore, it appears that composites containing high purity copper and hard particles or layers could meet the opposed requirements: high electrical conductivity and high abrasion resistance. This second phase could be composed of other metals [2][3][4], intermetallics [5][6][7] or ceramics [8][9][10][11][12][13][14][15][16][17]. Metalintermetallic composites offer an attractive combination of the component properties.…”

Section: Introductionmentioning

confidence: 99%

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PROCESSING AND PROPERTIES OF SINTERED COPPER-IRON And COPPER-STEEL COMPOSITES

Konieczny

2020

METAL 2020 Conference Proeedings

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Copper matrix reinforced with iron or carbon steel particulate composites were made by means of the powder metallurgy route. The reinforcement particles were added to copper metal powders with the composition of 15 wt% Fe and mixed mechanically. Each mixture of the investigated powders was cold compacted at 624 MPa. The green compacts were sintered at 900 °C in dissociated ammonia atmosphere. Identification of the structure was performed on the basis of iron-copper phase diagram. Results of X-ray microprobe analysis allowed to find that the reinforcement particles were connected with copper matrix by solid solutions. Also the concentration of iron in copper across the iron (or steel)-copper matrix boundary was investigated. Measurements showed that the highest hardness of 41 HB could be achieved for Cu-steel composites because particles contained cementite. The same composites also had higher electrical conductivity (27 MS/m that was about 48 % of electrical conductivity of sintered copper) because their copper matrix contained lower concentration of iron atoms. Tribological tests showed that the wear mass loss of the copper-steel composites was approximately 2 times smaller than for the copper-iron composites and about 2.3 times smaller than for sintered copper.

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Section: Density Hardness and Electrical Conductivity Measurementssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

PROCESSING AND PROPERTIES OF SINTERED COPPER-IRON And COPPER-STEEL COMPOSITES

Konieczny

2020

METAL 2020 Conference Proeedings

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“…The most studied materials for thermal application are usually composed by an aluminium or copper matrix -due to their high thermal conductivity -or iron -due to the large usage of iron and its alloys as raw material for mechanical system parts [1][2][3][4][5] . Silicon carbide and diamond are widely used as additives, having high thermal conductivity and low thermal expansion that improve the dimensional stability of these composites [6][7][8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Effect of Microstructure on the Thermal Properties of Sintered Iron-copper Composites

et al. 2015

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Copper is a well know material for use as heat sink or heat exchanger. However, copper has a considerable low tensile strength and temperature limit. A material that has a good thermal conductivity, low cost, but also resistance is the desired. Effects of copper on the sintering and thermal properties of iron-copper composites produced by powder metallurgy and Fe on copper-iron composites have been investigated. Copper and iron were varied from 20 to 80 vol.% in the samples, alternating the continuous phase. Sintering studies were performed by in-situ dilatometry aiming to define the proper conditions for sintering, without swelling normally associated with copper. Results indicate that the type of sintering, final microstructure, specially the phases relation and distribution and not only the amount of copper, have a great effect into the thermal properties. By controlling the sintering parameters, it is possible to obtain dimensionally stable samples with higher thermal conductivity and lower copper amount.

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“…This activity has a significant effect on the reduction of oxides that are present on the surfaces of iron and alloying elements particles. According to Zhang et al [3] as well as Hryha et al [4], synthetic graphite has high reactivity at sintering process and provides higher mechanical properties of powder steel.…”

Section: Introductionmentioning

confidence: 99%

“…A study of the compressibility of iron with MC additives showed (Fig.4) that the compounds introduced make it possible to obtain a higher density than the standard addition of zinc stearate with all pressures tested. The maximum density (7 g/cm 3 ) was achieved with the introduction of 1% polydiethylene glycol adipate.…”

Section: Study Of the MC Introductionmentioning

confidence: 99%

On Increasing Powder Carbon Steels Properties Using Activating Additives

Dyachkova

2020

International Journal of Applied Mechanics and Engineering

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In this paper, the possibility of increasing powder carbon steels properties by activation of carbon diffusion into the iron base during sintering process due to the introduction of the thermally split graphite (TSG), macromolecular compounds (MC) and sodium bicarbonate was investigated. It was found that the introduction of these additives allows obtaining homogeneous structures at a sintering temperature of 100–200 °C lower than that traditionally used for sintering of powder carbon steels. Such structures provide increased mechanical properties of powder carbon steels. The addition of sodium bicarbonate increases the diffusion rate of carbon into iron at a temperature of 950 C by 1.8 times, at 1000 °C by 1.5 times, and at 1100 °C by 1.2 times.

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Modelling of swelling of Fe–Cu compacts sintered at temperatures above the copper melting point

Cited by 20 publications

References 10 publications

PROCESSING AND PROPERTIES OF SINTERED COPPER-IRON And COPPER-STEEL COMPOSITES

PROCESSING AND PROPERTIES OF SINTERED COPPER-IRON And COPPER-STEEL COMPOSITES

Effect of Microstructure on the Thermal Properties of Sintered Iron-copper Composites

On Increasing Powder Carbon Steels Properties Using Activating Additives

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