Microstructural evolution in Pt-implanted polycrystalline Al2O3. (15th January 2015)

• Record Type: Journal Article
• Authors: Gandman, Maria; Ridgway, Mark; Gronsky, Ronald; Glaeser, Andreas M.
• Is Part Of: Acta materialia. Volume 83(2015)
• Page Start: 169
• Page End: 179
• Publication Date: 2015-01-15
• Subjects: Alumina (α-Al2O3) -- Platinum -- Implantation -- Grain growth -- TEM; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2014.09.045
• Languages: English
• ISSNs: 1359-6454

Abstract

Abstract: Microstructural evolution in the near-surface layer of a model metal–ceramic system, Pt-implanted high-purity polycrystalline Al2 O3 (PCA), was studied, and compared to that in Pt-implanted sapphire. Interactions between Pt particles and migrating α / α grain boundaries in PCA caused Pt particle redistribution and Pt loss, and were evaluated in the context of Zener pinning and particle-drag theories. The experimental method allows the transition from the original to the new equilibrium shape due to the changes in orientation relationship to be examined. As a result of the potentially wide range of equilibrium shapes, interface crystallographies, and transitional morphologies that the microstructural evolution imposes, the experimental method provides a flexible framework for fundamental studies of the energetic and kinetic properties of ceramic–metal interfaces.