Metal-shell char particulate composites using copper-coated particles

Gopakumar, K.; Murali, T. P.; Rohatgi, Pradeep K.

doi:10.1007/bf00543523

Cited by 10 publications

(2 citation statements)

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“…In many applications of copper or copper alloys, a major limit hindering their practical usage arises from their poor mechanical strength, although they have outstanding electrical and thermal conducting properties as well as an excellent corrosion resistance. [1] A feasible way for solving this problem is a realization of the dispersion of a hard ceramic or oxide particles, particularly with ultrafine nano-size, within a copper matrix, i.e., metal matrix composites (MMCs). [2,3] This is because it can provide the combined properties of a high electrical and thermal conductivity of Cu, and at the same time a high strength and chemical stability of ceramics.…”

Section: Introductionmentioning

confidence: 99%

The Mechanical Milling Behavior of Ductile Cu Flakes when Using Ultrafine Al2O3 Reinforcements

Lee

Kim

Hong

et al. 2007

SSP

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In this study the effects of harder ultrafine Al2O3 particles on the mechanical milling of ductile Cu flakes (200mesh, 70μm) have been investigated. The small hard Al2O3 particle in the mixture acted as an effective milling agent not only by inducing a drastic change of the Cu morphology from flattened flakes to equiaxed crystals but also by reducing the milling time required for a uniform dispersion of Al2O3 in the Cu matrix. This was more pronounced as the Al2O3 concentration increased. A critical concentration of the reinforcing Al2O3 required for a shape change was observed at the range of 8 to 9wt. %. All the hard Al2O3 particles were uniformly embedded in the ductile Cu matrix regardless of the concentration of Al2O3. By increasing the milling time, the weldment and fragmentation of the Cu flakes became significant and a uniformly distributed equiaxed composite structure (13wt.% Al2O3) was obtained at above 70 min..

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Section: Introductionmentioning

confidence: 99%