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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Refractory Metals 2016
Presentation Title Influences of Rare Earth on Microstructures and Mechanical Properties of Functionally Graded Cemented Carbides
Author(s) Xiaofeng Li, Yong Liu
On-Site Speaker (Planned) Xiaofeng Li
Abstract Scope Functionally graded cemented carbides (FGCCs) were prepared by pre-sintering and carburizing of carbon-deficient WC-Co cemented carbides. TEM analyses indicated that Y is mainly distributed in Co phase, and another part of Y is separated in the interface of Co phase. Y distributed in Co phase has a strong effect on suppressing the grain growth of WC grains. Y separated in the interface can react with impurity elements, and purify grain boundary, and then reduce defect of FGCCs. The thickness of the gradient layer in the 0.5% Y2O3-added FGCCs is almost doubled compared with that in the Y2O3-free FGCCs because of the refinement of microstructures and the increased diffusion channels for carbon through the Co phase. The FGCCs with the addition of Y2O3 exhibit a much higher transverse rupture strength due to thicker gradient layer, finer microstructures and solution strengthening of Y in Co phase.
Proceedings Inclusion? Planned: A print-only volume


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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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