2017 Technical Division Student Poster Competition: Extraction and Processing Division (EPD) Undergraduate Students
Sponsored by: TMS Extraction and Processing Division, TMS Functional Materials Division, TMS Light Metals Division, TMS Materials Processing and Manufacturing Division, TMS Structural Materials Division
Program Organizers: TMS Administration
Monday 5:00 PM
February 27, 2017
Room: Hall B1
Location: San Diego Convention Ctr
SPU-1: Silicon Carbide (SiC) Adsorption and Carburization onto an Activated Carbon Matrix: Alaina Mallard1; 1Montana Tech of the University of Montana
Energy efficient methods of producing nano-crystalline silicon carbide (SiC) were investigated. Silicate (SiO32-) anions were adsorbed onto an activated carbon matrix from aqueous sodium silicate solutions of ionic concentrations ranging from 10000 ppm to 50000 ppm. Silicon carbide was formed by heating the loaded carbon precursor to 1000 – 1400 degrees Celsius under inert and reducing atmospheres. Experimental products were characterized via X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Inductively Coupled Plasma Spectroscopy (ICP-OES). Silicon carbide ‘whisker’ formation was observed in products obtained by processing the precursor materials with high silicon loading of 0.2 grams of silica per gram of carbon under a reducing atmosphere for one hour at temperatures as low as 1200°C. Future work will includes developing a statistical matrix to optimize the carburization parameters using Stat EaseDesignExpert9 statistical analysis software. In addition, current studies are focused on the separation of the whiskers from the carbon matrix.
SPU-2: Synthesis of Silicates on the Micro-scale: Alec Affolter1; 1University of Tennessee
The Earth’s crust contains numerous minerals, most of which are silicates. Fluid/mineral systems involving silicates are useful for applications in changing pore size; however, these systems are complex. The objective of this research is to simplify these systems by synthesizing starting materials (quartz and anorthite) on the micro-scale with well-controlled chemistries and mineral faces that are not typically available in complex, natural samples. In this work, quartz was produced via hydrothermal synthesis. A solution of toluene, tetraethylorthosilicate, ethanol, deionized water, oleic acid, 1-molar potassium hydroxide, and sodium fluoride was mixed and heated at 300°C overnight and then repeatedly rinsed and centrifuged with methanol, deionized water, and nitric acid. Anorthite was synthesized by heating calcium carbonate, aluminum oxide, and silicon oxide to 1600°C, quenching in water, pulverizing the newly-made glass, and reheating the resultant powder for three days to assure homogenization and crystallization. X-ray diffraction yielded 99% quartz and 77% anorthite.