Porous materials: Less is more

Paolo Colombo, David C. Dunand, Vipin Kumar

Research output: Contribution to journalReview articlepeer-review

12 Scopus citations


Many components in simple or complex devices contain some degree of designed porosity, which specifically equips them to deliver a set of required performances. In porous polymers, the length scale for the cells has traditionally been of the order of millimeters, and the foam materials are typically of very low density, consisting of 95% or more voids and only a few percent of solid material. There is currently much research directed toward micro-cellular metals based on alloy systems different from aluminum, in particular higher-melting iron, copper and nickel-based alloys, for which powder metallurgy is often used, allowing for the creation of smaller pores in the range of 10-100 μm. Porous titanium has been under particularly vigorous study because its biocompatibility makes it an ideal permanent bone implant. The combination of ceramic and polymers in a same component or cell-seeded titanium foams have also been recently proposed.

Original languageEnglish (US)
Pages (from-to)2187-2190
Number of pages4
JournalJournal of Materials Research
Issue number17
StatePublished - Sep 14 2013

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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