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Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001070
EISBN: 978-1-62708-162-7
... Abstract This article briefly reviews the subject of copper-base powder-metallurgy (P/M) products in terms of powder production methods (atomization, oxide reduction, electrolysis, and hydrometallurgy) and the product properties/consolidation practices of the major applications. Of the four...
Abstract
This article briefly reviews the subject of copper-base powder-metallurgy (P/M) products in terms of powder production methods (atomization, oxide reduction, electrolysis, and hydrometallurgy) and the product properties/consolidation practices of the major applications. Of the four major methods for making copper and copper alloy powders, atomization and oxide reduction are presently practiced on a large scale in North America. The article provides information on the mechanism, production, properties, composition and applications of different types of copper-base P/M products, including self-lubricating sintered bearings, structural parts, oxide-dispersion-strengthened copper, sintered metal friction materials, and porous filters.
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Published: 15 June 2020
Fig. 44 Sections of copper powder particles. (a, b) Relatively clean copper powder for which surface oxides are the dominant contributor to overall oxygen content. No grain-boundary oxides are visible within the resolution of the instrument. (c, d) After multiple reuse events, there is visible
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Published: 30 September 2015
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Published: 15 June 2020
Fig. 43 Oxygen content of copper powder atomized from oxygen-free electronic copper bar, screened in air and argon to a 15 to 53 μm distribution. The data show the pickup of oxygen from the powder manufacturer to the first and tenth runs using electron beam powder-bed fusion. The oxygen
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in Copper Powder Metallurgy Products
> Properties and Selection: Nonferrous Alloys and Special-Purpose Materials
Published: 01 January 1990
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in Copper Powder Metallurgy Products
> Properties and Selection: Nonferrous Alloys and Special-Purpose Materials
Published: 01 January 1990
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in Copper Powder Metallurgy Products
> Properties and Selection: Nonferrous Alloys and Special-Purpose Materials
Published: 01 January 1990
Fig. 7 Scanning electron micrograph of hydrometallurgically produced copper powder (cement copper)
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Published: 01 December 2004
Fig. 19 Progress of sintering in a loose stack of copper powder spheres, secondary electron images. (a) Light bonding at 600 °C (1110 °F) during heating to sintering temperature. (b) After sintering for 1 h at 1050 °C (1920 °F). Clearly visible is the formation of necks between touching
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Published: 30 September 2015
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Published: 30 September 2015
Fig. 22 Particles (+8 mesh) of copper powder hammer milled from oxide-reduced sinter cake. Courtesy of SCM Metal Products
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Published: 30 September 2015
Fig. 12 Relative density versus time during the sintering of copper powder compact (particle size = 11 μm; green density = 70%) at 980 °C in hydrogen. Source: Ref 100
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Published: 30 September 2015
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Published: 30 September 2015
Fig. 21 Electrolytic copper powder showing dendritic structure. Original magnification: 85×. Source: Ref 14
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Published: 01 August 2013
Fig. 1 Micrometer-sized copper powder used in cold spray experiments/applications. Source: Ref 1
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Published: 01 December 1998
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Published: 01 December 1998
Fig. 9 Particles (+8 mesh) of copper powder hammer milled from oxide-reduced sinter cake. Source: Ref 5
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Published: 15 June 2020
Fig. 2 Effect of porosity on the electrical conductivity of sintered copper powder for various temperatures relevant to powder-bed fusion additive manufacturing processes. Source: Ref 107
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Published: 15 June 2020
Fig. 46 Density and volumetric shrinkage of binder-jet-consolidated copper powder (15 μm median size, 96.3% purity) sintered at 1060 °C (1940 °F) for 2 h in both reducing and nonreducing atmospheres. Source: Ref 42
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Published: 15 June 2020
Fig. 49 Gallium ion contrast channeling image of air-atomized copper powder with high initial oxygen content (~1800 ppm) after hydrogen heat treatment (Ref 123)
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Book: Powder Metallurgy
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006105
EISBN: 978-1-62708-175-7
... Abstract Development of the properties of copper powder metallurgy parts is affected by pressing and sintering processes used in the production of components, such as contacts, carbon brushes, and friction materials. This article briefly describes the powder properties of copper and discusses...
Abstract
Development of the properties of copper powder metallurgy parts is affected by pressing and sintering processes used in the production of components, such as contacts, carbon brushes, and friction materials. This article briefly describes the powder properties of copper and discusses the roles of lubricant and compaction dies in pressing of copper powders. It explains the structural defects that originate during the compaction process of PM parts. The article also provides information on sintering, re-pressing, and re-sintering of copper PM parts.
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