Tailored metal–ceramic nanocomposites prepared by redox cycling of polycrystalline Ni-doped yttria stabilized zirconia. (February 2016)

• Record Type: Journal Article
• Authors: Morrissey, Amy; O'Brien, James R.; Reimanis, Ivar E.
• Is Part Of: Scripta materialia. Volume 112(2016)
• Page Start: 109
• Page End: 113
• Publication Date: 2016-02
• Subjects: Nanocomposite -- Oxidation -- Magnetic properties -- Ni-YSZ; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.09.025
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: We demonstrate it possible to tailor unique metal–ceramic nanocomposites through redox cycling of Y2 O3 -stabilized ZrO2 containing 0.5 molar percent NiO (below the solubility limit). Upon the first reduction, Ni 2 + ions precipitate as metallic Ni 0 at pores, grain boundaries, or within the grain interiors with specific size ranges (~ 5 nm/~ 30 nm/~ 200 nm) for each. Upon oxidation, Ni 2 + ions form, but their distribution is not the same as the original microstructure. In particular, NiO forms, and subsequent reduction leads to a distribution of metallic Ni different from that in the first reduction. One can ratchet the dissolution/precipitation behavior to form particular nanoscale arrangements. Graphical abstract: