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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Refractory Metals 2016
Presentation Title Micro-Mechanical Characterization of Micro-Architectured Refractory Metal Coatings
Author(s) Quan Jiao, Jaafar A. El-Awady
On-Site Speaker (Planned) Jaafar A. El-Awady
Abstract Scope Recent advances in surface engineering has led to a new set of thermal barrier coatings based on refractory metals. Refractory metals, such as tungsten and its alloys, are primary candidate materials for coatings of structural components in extreme environments. In this talk we present the first set of micro-mechanical experiments to characterize the microstructure, mechanical properties, and damage modes of a new set of micro-patterned tungsten dendritic coatings developed by ULTRAMET. Micropillar like specimens are FIB milled into individual dendritic structures. The effect of pillar size on the deformation response is reported. We show that the strength of these dendritic coatings are equivalent to those reported for ultrafine-grained tungsten. We show that these coatings demonstrate ultrahigh strength equivalent if not beyond that of nanocrystalline tungsten.
Proceedings Inclusion? Planned: A print-only volume


Effect of Silicon on Texture of Niobium
Etched Surface of CVTD Single Crystal Tungsten Coating after Serving under High Temperature
Fracture of Severely Plastically Deformed Niobium and Tantalum
High Temperature Properties of Directionally Solidified Nb-rich Nb-Si-Cr Eutectics
Improving the Performance of Nb-Silicide Based Refractory Alloys through a Novel Cold Crucible Directional Solidification
Influences of Rare Earth on Microstructures and Mechanical Properties of Functionally Graded Cemented Carbides
Introduction of Precisely Controlled Microstructural Defects into SRF Cavity Nb Sheet and Their Impact on Local Superconducting Properties
Manufacturing of Bulk Ultrafine Grain Tungsten from Nanocrystalline Tungsten Powder and Its Potential Application for Nuclear and Fusion Reactors
Mechanical Properties of Cold-rolled Tungsten at Different Strain Rates
Micro-Mechanical Characterization of Micro-Architectured Refractory Metal Coatings
Micromechanical Testing of Multi Compositional Tungsten Thin Film Alloys
Microstructure and Properties of a Ternary Eutectic Mo-Si-B Alloy
On Plasticity of Polycrystalline Rhenium at Room Temperature
Reactive Spark Plasma Sintering of Tungsten Borides Using Elemental Tungsten and Boron Powders
Size Effect of Intermetallic Compounds on Fracture Toughness of Mo-Si-B Alloys
Stress Accommodation in Plastic Zone Ahead Crack Tip in Iridium
The Initiation and Propagation of Dynamic Abnormal Grain Growth in Refractory Metals
Thermally Activated Deformation Processes in Body-Centered Cubic Cr – How Microstructure Influences Strain-Rate Sensitivity

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