I want to know which inforcement in the metal matrix composites increases the electrical conductivity of it. Also, state the reinforcement to reduce the thermal expansion. Kindly mention some examples.
I think metal(s) and metal oxide reinforcement would enhance the electrical conductivity and also reduce thermal expansion of the MMC during high temperature backing. You can see the following review:
Metal–Matrix Composites, DOI: 10.1016/B978-0-12-803581-8.03950-3
Hi Sriam,
This is certainly a fascinating topic in metal matrix composites research. I am not sure what kind of metal matrix you are aiming for. But there are indeed several investigations toward graphite reinforced aluminium composites (Article Layer by layer graphite film reinforced aluminum composites ...
;Article Preparation of graphite flakes/Al with preferred orientation...
) and diamond reinforced copper composites (Article Optimized thermal properties in diamond particles reinforced...
) where enhanced thermal physical performances have been achieved. More theoretical understanding towards this topic can also be found in the MMC textbook "An Introduction to Metal Matrix Composites". Hoping these may be helpful to you.
Dear Sriram,
It is known that a reduction in electrical conductivity is generally exhibited by MMCs than their base metals. However, graphite-based reinforcements, like Carbon nanotubes (CNTs) and Graphene, may improve electrical conductivity due to their inherent properties, even though some studies reported a decrease* in electrical conductivity in these composites.
*Xu CL, Wei BQ, Ma RZ, Liang J, Ma XK, Wu DH. Fabrication of aluminum-carbon nanotube composites and their electrical properties. Carbon 1999;37(5):855–8.
This study may help you.
Anas
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