Ceramic Materials Research Scientist / Engineer
Resume:
William S Rubink
**** * *** **. ******, Texas ***01
********@**.**
Career Summary
Ceramic Materials Researcher / Engineer
Over two years as a research assistant for The University of North Texas I provided operations, support, and consultation regarding the use and maintenance of our spark- plasma sintering system. In addition to my thesis utilizing the SPS system I also conducted research and design on synthesis regarding ceramic-ceramic composites exhibiting improved properties individually and a fracture toughness well above that of its individual components. I also supported research in solid state ceramic joining and synthesis of novel corundum-nickel composites. Hallmarks:
Materials Selection
Research and Design
Statistical Methods to Quantify Results
Powder Processing, Analysis, and Sintering
Ceramic Materials Characterization by XRD/SEM/ImageJ Analysis Education
University of North Texas, Denton, Texas 2016-2018 Master of Science in Materials Science and Engineering
Graduated Cum Laude
Graduate GPA 3.63/4.0
University of North Texas, Denton, Texas 2013-2016 Bachelor of Science in Materials Science and Engineering
Undergraduate GPA 3.25/4.0
Undergraduate President’s List
Minor in Chinese language
Austin Community College, Austin, Texas 2010-2013
Foundational preparation for a BA in studio ceramics Training and Qualifications
Equipment
Scanning electron microscopy, X-Ray diffraction and analysis, Spark plasma sintering, Electrical discharge machining. Familiarity with theory and methodology for XPS/XRF/AES/ SIMS. Familiarity with DOE, ANOVA. Certifications and Clearances
USN Advanced Communication Information Systems C-School 2003 USN Computer Network and Broadcast Communications 2005 DOD SSBI TS/SCI CI-Poly Clearance Clearable, Inactive 2008 Work Experience
University of North Texas 2016-Present
Research Assistant Denton, TX
Managed, operated, and trained users on use of a spark plasma furnace.
Coordinated and guided an undergraduate senior design team with their design and methodology for synthesis and joining of disparate ceramics.
Consulted on high temperature and pressure consolidation of novel nickel- corundum composites with a University of Dallas research group
Machined, polished, prepared, and tested specimens for characterization and mechanical testing to ASTM specifications
United States Navy 2002-2006
Communications Information Technician
Responsible for resolving hardware and software faults with military, civilian, and international agents over disparate networks resulting in effective 0% downtime
Directed installation and migration of department SCIF computers and networks
Advanced to Petty Officer Third Class (98th percentile ranking)
Managed specialized software to track and analyze longitudinal data
In June 2006, completed USN service contract with an honorable discharge Thesis
PROCESSING – STRUCTURE – PROPERTY RELATIONSHIPS OF SPARK PLASMA SINTERED BORON CARBIDE AND TITANIUM DIBORIDE CERAMIC COMPOSITES The aim of this study was to understand the processing – structure – property relationships in spark plasma sintered (SPS) boron carbide (B4C) and B4C-titanium diboride (TiB2) ceramic composites. SPS allowed for consolidation of both B4C and B4C-TiB2 composites without sintering additives, residual phases, e.g., graphite, and excessive grain growth due to long sintering times. A selection of composite compositions in 20% TiB2 feedstock powder increments from 0% to 100%, was sintered at 1900 C for 25 minutes hold time. A homogeneous B4C-TiB2 composite microstructure was determined with excellent distribution of TiB2 phase, while achieving ~99.5% theoretical density. An optimum B4C-23 vol.% TiB2 composite composition with low density of
~3.0 g/cm3 was determined that exhibited ~30-35% increase in hardness, fracture toughness, and flexural bend strength compared to commercial armor-grade B4C. This is a result of a) no residual graphitic carbon in the composites, b) interfacial microcrack toughening due to thermal expansion coefficient differences placing the B4C matrix in compression and TiB2 phase in tension, and c) TiB2 phase aids in crack deflection thereby increasing the amount of intergranular fracture. Collectively, the addition of TiB2 serves as a strengthening and toughening agent, and SPS shows promise for the manufacture of hybrid ceramic composites.
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