Erica L Corral
Associate Professor, BIO5 Institute
Associate Professor, Materials Science and Engineering
Distinguished Scholar, Materials Science and Engineering
Associate Professor, Aerospace-Mechanical Engineering
Primary Department
Department Affiliations
(520) 621-8115
Research Interest
Erica Corral, PhD, essentially dives into three primary areas of research. Her first research area focuses on processing ultra-high temperature ceramic (UHTC) composites and coatings for use as advanced thermal protection systems and to provide oxidation protection of carbon-carbon composites. Secondly, she focuses on developing bulk multifunctional high-temperature ceramic nanocomposites reinforced with single-walled carbon nanotubes for enhanced toughness in ceramics that also have tailored electrical and thermal properties. Last but not least, Dr. Corral also focuses on developing nanocomposite compositions of iron oxide and zirconia for use as hydrogen generation materials. Recent postdoctoral research also focused on investigating the thermomechanical properties of UHTCs, and engineering mechanical and chemical properties of glass-composites for use as reliable seals in solid oxide fuel cells, and ceramic powder processing of magnesium oxide and electrolyte powder for use in thermal batteries. As a graduate student at Rice University, Dr. Corral was an NSF-Alliance for Graduate Education and the Professoriate (AGEP) Fellow, and pioneered the first SWNT-reinforced silicon nitride nanocomposites with multifunctional properties.

Publications

Miller-Oana, M., & Corral, E. L. (2016). High-Temperature Isothermal Oxidation of Ultra-High Temperature Ceramics Using Thermal Gravimetric Analysis. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 99(2), 619-626.
Corral, E. L., Ayala, A. A., & Loehman, R. E. (2008). Evaluation of oxidation protection testing methods on ultra-high temperature ceramic coatings for carbon-carbon oxidation resistance. Ceramic Engineering and Science Proceedings, 28(2), 361-370.

Abstract:

The development of carbon-carbon (C-C) composites for aerospace applications has prompted the need for ways to improve the poor oxidation resistance of these materials, In order to evaluate and test materials to be used as thermal protection system (TPS) material the need for readily available and reliable testing methods are critical to the success of materials development efforts, With the purpose to evaluate TPS materials, three testing methods were used to assess materials at high temperatures (> 2000°C) and heat flux in excess of 200 Wcm-2. The first two methods are located at the National Solar Thermal Test Facility (NSTTF) at Sandia National Laboratories, which are the Solar Furnace Facility and the Solar Tower Facility, The third method is an oxyacetylene torch set up according to ASTM E285-80 with oxidizing flame control and maximum achievable temperatures in excess of 2000°C In this study, liquid precursors to ultra high temperature ceramics (UHTCs) have been developed into multilayer coatings on C-C composites and evaluated using the oxidation testing methods. The tests will be discussed in detail and correlated with preliminary materials evaluation results with the aim of presenting an understanding of the testing environment on the materials evaluated for oxidation resistance.

Walker, L. S., Miller, J. E., Hilmas, G. E., Evans, L. R., & Corral, E. L. (2011). Coextrusion of Zirconia-Iron Oxide Honeycomb Substrates for Solar-Based Thermochemical Generation of Carbon Monoxide for Renewable Fuels. ENERGY & FUELS, 26(1), 712-721.

Ceramic honeycombs based on homogeneous composites of zirconia and iron oxide are formed using polymer-based coextrusion for testing in thermochemical reactors to generate CO for renewable fuels. The honeycomb substrates possess controlled surface areas and are processed using zirconia with 3 and 8 mol % yttria additions to investigate the influence of surface area and oxygen conductivity of the substrate on the CO generation properties. CO generation was tested using a gas chromatography mass spectrometer and a laboratory scale thermochemical reactor capable of precisely controlling temperature and gas conditions. Results showed that reaction temperature and reactant gas flow rate effect CO generation. The yttria content of the zirconia support phase was also found to have a significant impact on the long-term CO generation, improving iron oxide conversion from 41 to 58%. Yttria content did not markedly impact the short-term reaction properties. Increasing the surface area of the substrates, from 2.6 up to 8.5 cm(2), did not result in improvements in CO generation within the resolution of the test equipment. The substrates reacted by two distinct mechanisms, an initial, spontaneous surface reaction that changed over time to a diffusion-based mechanism utilizing reaction material from the bulk. These substrate systems exhibit the high reactivity necessary for large-scale thermochemical reactors, while being based on common materials.

Varma, S. K., Salas, D., Corral, E., Esquivel, E., Chawla, K. K., & Mahapatra, R. (1999). Microstructural development during aging of 2014 aluminum alloy composite. Journal of Materials Science, 34(8), 1855-1863.

Abstract:

The 2014 aluminum alloy reinforced with 0.1 and 0.15 volume fraction of alumina particles (VFAP) have been solutionized for a range of time from 1.5 to 20 h at 813 K. The effect of solutionizing time (ST) on the age hardening response of the composites has been studied and compared with the characteristics exhibited by the monolith. The results indicate that increasing the ST decreases the time required to get the peak hardness (TPH) values in the monolith but the composites do not show a systematic monotonic behavior. The TPH values first decrease and then increase with an increase in ST at an aging temperature of 473 K for the composite. It has been speculated that the ST influences the concentration of quenched-in vacancies and continued heating may affect the bonding between particles and matrix which can generate additional dislocations throughout the solutionizing process due to curvature effects.

Fuller, J., Hilmas, G., Fahrenholtz, W., Corral, E., & Riegel, L. (2010). Guest Editorial. Journal of the European Ceramic Society, 30(11), 2145-2146.