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Stephen Keen

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Stephen Keen

  1. 1. 22050 Pinebrook Drive, New Caney, TX · USA E-MAIL sckeen1988@gmail.com · PHONE 713.858.6458 Stephen Keen Interests Chemical synthesis, Fluid dynamics, Thin film deposition, Interfacial dynamics, Nanomechanical characterization Education 2013 B.S., Texas A&M University, College Station, TX, USA. Department of Geosciences Skills Analysis Tribologicalfailure analysis, AFM, SEM, Nanoindentation, Nanoscratch, ExperimentalTribological testing, Nanomechanical Characterization, Electrodeslurry creation, Computer Matlab, Solidworks,Microsoft Office WorkExperience March 2015 – Present Research Assistant: Texas A&M University Mechanical Engineering I reported to Andreas Polycarpou,providing specific duties pertaining to research activities including the evaluation, selection, and application of standard techniques of routine research. My responsibilities included building a Li-Ion battery station and a chemical vapor deposition chamber as wellas managing research withfour tribometers, an atomic forcemicroscopeand a nanoindenter. A general project overview is listed below. January 2012- March 2015 Sales Specialist Generate new customers by building positive relationships, analyzing all competitions and providing superior solutions. I managed multiple installation projects at any given time including project planning, design, and execution. I assisted customers in visualizing and achieving their goals using all available products and services to insure each customer’s needs were met while consistently exceeding all sales goals forthe department. I was also responsible formaintaining accurate inventory counts logical merchandising. Affiliations January 2012 – January 2014
  2. 2. American Association of Petroleum Geologists Research Experience March – May 2015 ATSP Innovations Characterization of the tribological properties of Aromatic Thermosetting Polyester (ATSP) films on different substrates as well as with different compositions, in general varying percentage of PTFE in the film. A high pressure tribometer with a pin on disk apparatus is used to test varying conditions, then a profile obtained and SEM analysis done todetermine cause and type of failure. March 2015 – Present Lithium Ion Battery Set up a mass flow controller and chemical vapor deposition chamber. Testing of different material combinations for optimal cycleefficiency and performance. Further development of novel Si based battery electrodes to further increase cycleefficiency. May 2015 Seagate Extremely shallow indentation on hard disks to create a detailed depth versus Hardness/Elastic Modulus plot for depths starting below 10nm. This outlined mechanical properties of the many layers in a hard disk surface, and gives valuable information to hard disk failure mechanism May 2015 - Present Nanomechanical Properties of PVA and Graphene Oxide Films Nanomechanical characterization of a 140nm – 200nm thick layer by layer assembly thin film,determining the effectsof Graphene Oxide reduction and cross linking of PVA on the hardness, elastic modulus, elastic recovery and friction of the materials. Substrate effectsare also probed for to determine true filmproperties. July 2015 – Present Solar Glass Mechanical Properties Experimental methods of nanoindentation and nanoscratch are used to test sand damage on solar protectant glass, and the effect of this damage on light transmittance and overall efficiency. An FEM model is developed from experimental results to correspond to different storm situations. August 2015 United Research Center Investigation of the lubricity effects of three different environmentally friendly refrigerants. Identical steel discs were tested using a high pressure tribometer with a pin on disk apparatus set up with varying conditions, then a profile obtained and SEM analysis done to determine cause and type of failure. September 2015 Cryogenic Testing Apparatus I designed and built an apparatus to test samples at temperatures between -40°C and - 129° C, with the capability to test much colder. Low temperatures can be achievedvery quickly, cooling rate limited by the thermal contraction of sample. Set up is less than 10% as expensive to create as industry coolingapparatus.

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