Atomic-Scale Structural and Chemical Study of Columnar and Multilayer Re–Ni Electrodeposited Thermal Barrier Coating

Sung Il Baik, Alla Duhin, Patrick J. Phillips, Robert F. Klie, Eliezer Gileadi, David N. Seidman, Noam Eliaz*

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Rhenium alloys exhibit a unique combination of chemical, physical, and mechanical properties that makes them attractive for a variety of applications. Herein, we present atomic-scale structural and atomic part-per-million level three-dimensional (3D) chemical characterization of a Re–Ni coating, combining aberration-corrected scanning transmission electron microscopy (STEM) and atom-probe tomography (APT). A unique combination of a columnar and multilayer structure is formed by single-bath dc-electroplating and is reported here for the first time. Alternating thicker Re-rich and thinner Ni-rich layers support a mechanism in which Ni acts as a reducing agent. The multilayers exhibit hetero-epitaxial growth resulting in high residual shear stresses that lead to formation of corrugated interfaces and an outer layer with mud-cracks.

Original languageEnglish (US)
Pages (from-to)1133-1144
Number of pages12
JournalAdvanced Engineering Materials
Volume18
Issue number7
DOIs
StatePublished - Jul 1 2016

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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