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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
Presentation Title D-53: Magnesiothermic MASHS and Pressureless Sintering of Diborides of Zirconium and Hafnium
Author(s) Sergio Cordova, Evgeny Shafirovich
On-Site Speaker (Planned) Sergio Cordova
Abstract Scope Materials based on diborides of zirconium and hafnium (ZrB2 and HfB2) are promising for ultra-high temperature applications. Self-propagating high-temperature synthesis (SHS) is attractive for the fabrication of such materials. SHS of ZrB2 and HfB2 from elements is well known, but it is not suitable for large-scale fabrication because of high costs of raw materials. Magnesiothermic SHS involves reduction of their oxides by magnesium and it is more economically viable. However, the reacting mixtures are low-exothermic and are difficult to ignite. One promising approach to enabling combustion of low-exothermic mixtures is mechanical activation-assisted SHS, which involves a short-duration, high-energy milling step before the combustion process. The obtained ZrB2 and HfB2 powders can be densified by pressureless sintering using additives. Here, we report the results of using mechanical activation for improving magnesiothermic SHS of ZrB2 and HfB2 followed by pressureless sintering.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

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Characterization of the Liquid Phase Sintered Tungsten Heavy Alloys Prepared by an Electrochemically Produced Tungsten Powder
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D-52: High-temperature Mechanical Properties of Powder Forged Ti-6Al-4V Alloys
D-53: Magnesiothermic MASHS and Pressureless Sintering of Diborides of Zirconium and Hafnium
Densification of Near-net Shape Turbine Blades in TiAl by Spark Plasma Sintering
Development of Gas Atomization for Generating Reactive Metal Powders for Additive Manufacturing and Powder Processing
Effect of Gradient Structure on the Sound Absorption Coefficient of Porous Metal Fiber Materials
Effect of Minor Titanium Addition on Copper/Diamond Composites Prepared by Hot Forging
Effects of Geometry Anisotropy on Fluid-flow and Mechanical Properties of Titanium Foams
Experimental Characterization of Polymeric Particles with Micro Compression Tester
Fabrication of Functional Materials Powder by Powder Metallurgical Process, and Investigation of their Bulk Properties
Fabrication of Porous Copper Structure by Using Powder Injection Molding and Space Holder Technology
Fabrication of Powder Metallurgy Ti-6Al-4V Connecting Rod by Powder Forging Process
FAST-forge: From Rutile Sand to Novel Titanium Alloy Aerospace Component in 3 Steps
Hot Deformation Behaviors of Powder Metallurgy Ti-6Al-4V Alloy with Different Microstructures
Implementation of a Multi-physics Model for Simulating Microstructural Evolution during Sintering
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Mechanical Characterization of Cold Sprayed Aluminum Alloy Powders Using In-situ Micropillar Compression and Tension
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Mesoscale Modeling of Single Particle Impact Induced Microstructural Evolution during Cold Spray of Aluminum Powders
Microstructural and Chemical Analysis of Gas Atomized and Heat Treated Aluminum Alloy Powders
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Novel Continuous Extrusion of Titanium Powders for Wire Applications
Numerical Modeling of Gas-atomized Metal Powders: Powder Size Distribution
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Optimization of Manufacturing Process for the High Magnetic Properties of Nd-Fe-B Bonded Magnets Using High-energy Compaction Method
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Preparation of Titanium Foams with Uniform and Fine Pore Characteristics through Powder Metallurgy Route Using Urea Particles as Space Holder
Processing and Characterization of Porous High Entropy Alloy Structures via Freeze-casting
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Production of Ti-6Al-4V Alloy Powder by Mechanical Alloying and Plasma Spheroidisation
Research Progress in High-performance Metal Powder Porous Materials
Selective Laser Melting Based Additive Manufacturing (SLM-AM) of Commercially Pure Titanium (CP-Ti): Development of Cost-affordable Ti Powder for AM , and High-strength As-printed CP-Ti
Solid-state Sintering of Al Alloy Powder and AlN Synthesis in Sintering
Synthesis and Characterization of Dual Matrix In-situ Al-based Nanocomposites
Technologies for the Processing of Sieve Residues: A Novel Approach for Cost-effective Production of 3D Printing Powders
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