Interfacial reactions in model NiTi shape memory alloy fiber-reinforced Sn matrix "Smart" composites

J. P. Coughlin, J. J. Williams, G. A. Crawford, Nikhilesh Chawla

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


In this article, the microstructure properties of a novel Pb-free solder composite were examined. A binary nickel-titanium shape memory alloy (SMA) fiber was used to reinforce the Sn-rich matrix, to take advantage of the superelastic properties of the fiber. The objective of this study was to understand long-term, high-temperature interfacial growth in a model NiTi fiber-reinforced Sn matrix composite solder system. The microstructure was quantified by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and wavelength dispersive spectroscopy (WDS). The mechanical properties of the interfacial zone, e.g., Young's modulus and hardness, were characterized by nanoindentation. The evolution of the reaction products with time and the relationship between composition and local mechanical properties are discussed.

Original languageEnglish (US)
Pages (from-to)176-184
Number of pages9
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Issue number1
StatePublished - 2009

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys


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