Porous copper template from partially spark plasma-sintered Cu-Zn aggregate via dezincification

Mandal, Manas K.; Singh, Deepak Kumar; Gouthama,; Murty, B.S.; Sangal, S.; Mondal, K.

doi:10.1007/s12034-014-0001-x

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…the preferential dissolution of zinc, is a typical course of corrosion of the CuZn alloys used e.g. for the preparation of porous copper structures [26,27]. The slightly higher loss of Zn within the "overpress" (in comparison to other elements of the metallic layer) that occurs in the forced corrosion process of the CuZnNi/PP sample was confirmed by EDX microanalysis (see Table 4).…”

Section: Corrosion Behaviour Of Cuznni Based Systemsmentioning

confidence: 70%

Corrosion Behaviour of CuSn- and CuZnNi-coated Polypropylene Nonwoven

Dobruchowska

Koprowska

2016

F&TinEE

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The intended purpose of metallised nonwovens is architectural shielding against electromagnetic fields. Therefore the aim of this work was to systematically investigate the corrosion behaviour of metallic layer/polypropylene nonwoven systems in the contact with an aggressive environment (3% NaCl solution). In the work, a thermo-bonded polypropylene nonwoven was used as a substrate for CuSn and CuNiZn thin layer deposition. Nonwoven metallisation was carried out using the magnetron sputtering process. Additionally to enhance the durability of these barrier materials, their surfaces were covered with a thin, hydrophobic coating of polydimetylsiloksane. Evaluation of the corrosion resistance was made by means of potentiodynamic polarisation tests. Furthermore the degree of loss of the metallic layers was checked using a optical metallographic microscope and quantitative microanalysis by the method of Energy Dispersive X-ray Spectroscopy. It was found that the CuZnNi metallic layer deposited onto the polypropylene nonwoven shows higher corrosion resistance as compared to CuSn. In both cases, the metallic layers are the most susceptible to degradation within the nonwoven "waves". Regardless of the layers' chemical composition, the polydimetylsiloksane coating increases their corrosion resistance in 3% NaCl solution.

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Section: Corrosion Behaviour Of Cuznni Based Systemsmentioning

confidence: 70%

Corrosion Behaviour of CuSn- and CuZnNi-coated Polypropylene Nonwoven

Dobruchowska

Koprowska

2016

F&TinEE

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“…Dissolution of a component from an alloy represents a process of dealloying; in this process, pores form as the structure of the depleted alloy experiences atomic rearrangement. As reported by Mandal et al [39], SPS of mixtures of copper and zinc powders results in the formation of compacts, in which alloying proceeded only at the inter-particle contacts due to fast processing. The initial mixture of copper and zinc powders was milled under low-energy conditions in order to produce a uniform mixture and not to allow alloying to take place.…”

Section: Fabrication Of Porous Materials By Sps Using Space Holdermentioning

confidence: 85%

Fabrication of Porous Materials by Spark Plasma Sintering: A Review

2019

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Spark plasma sintering (SPS), a sintering method that uses the action of pulsed direct current and pressure, has received a lot of attention due to its capability of exerting control over the microstructure of the sintered material and flexibility in terms of the heating rate and heating mode. Historically, SPS was developed in search of ways to preserve a fine-grained structure of the sintered material while eliminating porosity and reaching a high relative density. These goals have, therefore, been pursued in the majority of studies on the behavior of materials during SPS. Recently, the potential of SPS for the fabrication of porous materials has been recognized. This article is the first review to focus on the achievements in this area. The major approaches to the formation of porous materials by SPS are described: partial densification of powders (under low pressures, in pressureless sintering processes or at low temperatures), sintering of hollow particles/spheres, sintering of porous particles, and sintering with removable space holders or pore formers. In the case of conductive materials processed by SPS using the first approach, the formation of inter-particle contacts may be associated with local melting and non-conventional mechanisms of mass transfer. Studies of the morphology and microstructure of the inter-particle contacts as well as modeling of the processes occurring at the inter-particle contacts help gain insights into the physics of the initial stage of SPS. For pre-consolidated specimens, an SPS device can be used as a furnace to heat the materials at a high rate, which can also be beneficial for controlling the formation of porous structures. In sintering with space holders, SPS processing allows controlling the structure of the pore walls. In this article, using the literature data and our own research results, we have discussed the formation and structure of porous metals, intermetallics, ceramics, and carbon materials obtained by SPS.

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“…Brass on its own is very difficult to produce by the conventional powder metallurgy technique (pressing and sintering). This is because of the high rate of evaporation of the very volatile zinc during sintering, leading to high amount of residual porosity and non-uniformity in composition [15]. Spark plasma sintering (SPS) can be a very novel method of consolidation of metal powders which completely eliminates the problem of zinc loss by evaporation using a pulsed DC power and uniaxial pressure [15].…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies on the Effects of Tin on the Densification of W-Brass Composites

Gowon

Mohammed

Jamaluddin

et al. 2015

AMM

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The effects of 1% tin (Sn) addition on the densification of pre-alloyed and pre-mixed W-brass composites were carried out. The green compacts were produced with the pressure of 350MPa and sintered at the temperature of 800°C, 920°C and 1000°C. The Sn addition is aimed at inhibiting the dezincification (selective removal of zinc from an alloy) of the brass component by the elimination of pores and enhances densification. The hardness of the composites increased with increase in temperature, the densification was low at both temperatures while the electrical conductivity remains constant as a result of constant composition in both pre-alloyed and pre-mixed composites. The microstructures revealed pores, which might be as a result of zinc evaporation.

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Porous copper template from partially spark plasma-sintered Cu-Zn aggregate via dezincification

Cited by 10 publications

References 22 publications

Corrosion Behaviour of CuSn- and CuZnNi-coated Polypropylene Nonwoven

Corrosion Behaviour of CuSn- and CuZnNi-coated Polypropylene Nonwoven

Fabrication of Porous Materials by Spark Plasma Sintering: A Review

Experimental Studies on the Effects of Tin on the Densification of W-Brass Composites

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