2017 Technical Division Student Poster Competition: Functional Materials Division (FMD) 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-3: Development of High Gain and Self-Deployable CubeSat Antennas Using Nickel-Titanium Shape Memory Alloys: Brittani Maskley1; Hunter Henderson; Harry Shaw2; Michele Manuel; 1University of Florida; 2NASA
CubeSats, extremely small form factor satellites that are 10-30 cm in dimension, do not currently have the capability to communicate with NASA Space Network satellites. Instead, CubeSats utilize short range communication with ground stations that is periodic and frequently interrupted. This study investigates the design of a high gain antenna that can be compacted into and deployed from a CubeSat, with the goal of communicating with Space Network satellites. Nickel-titanium shape memory alloys can act as a facilitating functional material for this application, providing a simplified actuation mechanism in a weight- and space-efficient package. Several prototype antennas were built, implementing either the Shape Memory Effect (SME) or pseudoelastic effect as the deployment mechanism of the antenna. All prototypes exhibited successful deployment but trade-offs between compactness, power requirements, component complexity, and deployment speed when using the SME and pseudoelastic effect.
SPU-4: Discovery of New Ternary Compounds and Scintillators of the A4BX6 Family: Jesse Johnson1; Luis Stand1; Bryan Chakoumakos2; Mariya Zhuravleva1; Mary Koschan1; Chuck Melcher1; 1University of Tennessee-Knoxville; 2Department of Energy-Oak Ridge National Lab
Scintillators are functional materials that convert ionizing radiation into pulses of visible light, and are fundamental in applications for medical imaging and radioisotope identification for homeland security. Exploration of new compounds is sought to find new high performance scintillators, and we report the discovery of the compounds Cs4SrI6, Cs3RbSrI6, Cs3KSrI6, and Cs3KCaI6 grown as single crystals from the melt via the Bridgman method. Initially Cs4SrI6 was discovered and it was found to have high light yield and good energy resolution, the measure of a good scintillator. We used single crystal diffraction to determine the crystal structure as the trigonal K4CdCl6 structure type, space group R3 ̅c. To improve scintillation properties, we focused on the crystal structure, and determined substitution of a single smaller monovalent cation would stabilize the matrix. We determined via powder X-ray diffraction that the structure of Cs3KSrI6 and Cs3KCaI6 changed, however Cs3RbSrI6 maintained the structure of Cs4SrI6.
SPU-5: Single Crystal Synthesis of Multiferroic Metal-organic Frameworks: Nicholas Combs1; Quentin Eustace1; 1University of Tennessee - Knoxville
Multiferroic materials are those in which both magnetic and electric ordering coexist. These materials are of interest, not only for fundamental scientific discovery, but for possible applications in devices based on the mutual control of magnetic and electric fields (e.g. spintronics). Recently, metal-organic frameworks (MOFs) have received attention as possible multiferroic candidates. Here we have made attempts to synthesize large single crystals of reported multiferroic MOFs suitable for magnetoelectric studies. The compounds we have explored include ammonium metal formates, [NH4]M(HCOO)3, and dimethylammonium metal formates, [(CH3)2NH2]M(HCOO)3 (M = Mn, Fe, Co, Ni), which are grown using methods derived from various sources in literature. These methods are still being explored and altered in efforts to be able to produce large crystals consistently with each growth. Initial magnetic and electric studies on crystals grown up to this point indicate that these may exhibit multiferroic behavior at low temperatures.
SPU-18: Porous-Wall Hollow Glass Microspheres for Security Printing Applications: Abigail McBride1; Forest Thompson1; George Wicks2; Grant Crawford1; 1South Dakota School of Mines and Technology; 2Applied Research Center
Copper oxide loaded porous-wall hollow glass microspheres (PWHGMs) are new possible functional material systems for anti-tamper security inks. The current loading method allows copper oxide crystals to form on both the surface and interior of the microspheres. Surface copper oxide hinders multiple loadings for completely filling spheres and limits anti-tamper functionality. We report on a copper oxide loading and cleaning method to increase loading effectiveness and remove surface copper oxide. PWHGMs were loaded by soaking in a CuCl2 precursor solution under vacuum and subsequently baking at 450oC in an air furnace to promote copper oxide formation. Initial leaching process development was conducted using copper oxide formed on glass slides and solid wall glass microspheres. The final cleaning method, using a 0.5 M HCl solution, was evaluated on PWHGMs. Scanning electron microscopy and direct visual inspection were used to evaluate cleaning performance. The size, morphology, and chemical composition of resulting copper oxide crystals were characterized using scanning electron microscopy in conjunction with energy dispersive x-ray spectroscopy.