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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Refractory Metals 2016
Presentation Title Reactive Spark Plasma Sintering of Tungsten Borides Using Elemental Tungsten and Boron Powders
Author(s) Govind Raj Choudhary, Ravi Kumar
On-Site Speaker (Planned) Govind Raj Choudhary
Abstract Scope Tungsten borides for their potential as superhard materials have become subject of interest recently. Much emphasis has been put in processing them in low pressure conditions. The aim of this study is to synthesize bulk boron-rich tungsten metal borides by using spark plasma sintering. Elemental tungsten and boron powders are mixed and ball-milled for 6 hours into two different compositions (B/W=2.5 and 4.5) and then sintered at temperatures 1100 C, 1200 C, 1300 C, 1400 C, 1600 C in argon atmosphere by using spark plasma sintering. Different phases such as WB, W2B5, WB2, WB4 are formed. The phase analysis has been done by X-ray diffraction. Elemental composition of the phases formed is analyzed by EDS analysis. Microstructural investigation has been done using scanning electron microscopy. It is also found that the some of the phases formed are very hard by using macro, micro and nanoindentation hardness measurements.
Proceedings Inclusion? Planned: A print-only volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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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