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Meeting MS&T21: Materials Science & Technology
Symposium 2021 Undergraduate Student Poster Contest
Presentation Title Effect of Carbon Stoichiometry on the Heat of Formation of Hafnium Carbides
Author(s) Amelia Martinez
On-Site Speaker (Planned) Amelia Martinez
Abstract Scope Ultra-high temperature ceramics are thermally stable at high temperatures making them desirable for use in extreme thermal conditions, such as those encountered by wing leading edges used in hypersonic vehicles. Hafnium carbide (HfC) is a material that is being investigated for its use in extreme thermal environments, as it maintains its structural stability to temperatures as high as 2200C. The focus of this poster is to identify the relationship between carbon stoichiometry and heat of formation of HfC. These results will be compared to existing thermodynamic literature on the enthalpies of formation of substoichiometric HfCs. In this study, three substoichiometric HfC compositions were synthesized through spark-plasma sintering. Samples were then characterized through nitrogen/oxygen analysis, carbon/sulfur analysis, XRD, Archimedes, and SEM. The samples were then combusted via oxygen bomb calorimetry to measure the heat of combustion in order to calculate the heat of formation for each composition.


Composition and Physicochemical Properties of Typical Waste Cooking Oil
Effect of Carbon Stoichiometry on the Heat of Formation of Hafnium Carbides
Effect of Modifier Cation Size on the Bulk Structure and Nickel Speciation in Alkali Borosilicate Glasses
Electron Cloud Migration Effect-induced Lithiophobicity/Lithiophilicity Transformation for Dendrite-free Lithium Metal Anodes
Enhanced Mechanical Properties in a 4140 Steel by "In-House" Intensive Quench
Experiential Study on Critical Stress Intensity Factor of Carbon Nanotube Filled Epoxy
Exploring the Liquid Phase Exfoliation of Two-Dimensional Bilayered Vanadium Oxide in Aqueous Media for Li ion Batteries
High Temperature Mechanical Properties of TiB2-WC-SiC Materials
Highly Crystallized Prussian Blue with Enhanced Kinetics for Highly Efficient Sodium Storage
Investigation of Embedded Metallic Components on 3D Printed Ceramic Structures
Machine Learning Approaches to Predict Properties from Microstructure Images in Ceramic-Metal Composites
Mechanical Behavior of Automotive Structural Steels in the Vicinity of the Ductile-brittle Transition
Mechanical Property Assessment of Silicon Carbide Fiber-reinforced Epoxy-matrix Composites
Optimal Integration of TiO2-Coated Gold Nanostars for Enhancement of Photocatalytic Water Reduction
Perovskite Film Formation for Solar Cell Absorbers: Effects of Substrate Modification
Pressure Optimization of Fast-Moving Silicon MEMS Micromirrors
Processing and Properties of (Ta, Nb, Hf, Ti)C
Rheological Characterization of Highly Loaded Alumina-Polymer Suspension for Thermal Paste 3D Printing
The Dynamic Performance of Wearable Sensors with Flexible Silver Ink
The Mechanisms of Micro-fine Titanaugite Enter to Ilmenite in the Flotation and Depression Behavior of Sodium Silicate
Thermal Analysis of Sodalite-immobilized Iodine-129 Caustic Scrubber Slurry
ZrB2 Aqueous Slurry Development for DIW Additive Manufacturing

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