Brains, Batteries, LEDs, and Broken GlassCassondra Brayfield

8/3/2015

Overview• A Bit of Background• Cognitive Science Project

• How olfaction training can improve neural plasticity and prevent Alzheimer's disease

• Work with Batteries • My part at BESS Tech

• Phosphor Production• Creation of phosphors• Testing of phosphors

• Fractography Projects• Measuring indent (check) depth• Leaving timing marks on glass fracture surfaces

My Background • Received a Bachelors in Materials

Science and Engineering• Work experience includes BESS

Tech, Smart Lighting, and Corning Inc.• TA and Research positions within RPI

• Extra curriculars:• Modelling • Writing for the RPI Magazine• Volunteering in Material buddies• Parkour • Outing Club• Cheese appreciation club• Extra Astronomy courses• Cognitive science research

Scent Lab the GameBrain Train Your Alzhiemer’s Away

Problems with Olfactory Loss

Device Designs

Fragrances

Game Interface - Alpha Phase

The Actual Device

My Role • Led a team of 7 extremely talented engineers

• Researched scent training and neural plasticity studies to drive project.

• Aided in the design and fabrication of the ScentLab device• Made the scent bottles with concentrate, Di-Propylene

Glycol, and sponges

• Designed the training progression

Making Better Batteries Working for a Start Up Battery Company

The Coin Cell

The Deposition ProcessThe metallic anodes (nickel, copper, stainless steel) were deposited with nickel and silicon in an attempt to grow different compositions of Nickel Silicide

Morphologies

Charge Capacity/Efficiency

My Role • Worked toward pin pointing the anode deposition

characteristics that output the best charge capacities and efficiency.

• Made the coin cells in glove box• Analyzed SEM images and Raman Spectra• Analyzed Arbin charge capacity and efficiency plots• Organized battery performance data and calculations that were

shared with collaborating laboratories.

• Assisted in initial success of a start up company• Informed financiers of the technology and networked with future

business partners

Phosphor EngineeringThe Road To Full Spectrum Phosphors

Reacting and Activating the Phosphors

Preparation and Testing

Matching the Sun’s Spectrum

Typical SpectraCRI Ra

94.9 (2248K)

CRI R194.2 (2248K)

CRI R296.5 (2248K)

CRI R390.9 (2248K)

CRI R492.4 (2248K)

CRI R595.4 (2248K)

CRI R696.5 (2248K)

CRI R795.2 (2248K)

CRI R898.0 (2248K)

CRI R996.9 (2248K)

CRI R1095.9 (2248K)

CRI R1195.7 (2248K)

CRI R1276.3 (2248K)

CRI R1393.7 (2248K)

CRI R1492.2 (2248K)

CRI R1591.4 (2248K)

• This slide was made using the dry method

• 0.0161g of Blue• 0.0038g of Green• 0.00005g of Red• 0.00003g of yellow

Getting Better

Contents:0.0058g-Green 10.0128g-Blue10.0003g-Red10.0004g-yellow 10.0236g-reacted multiphase CCT= 75270.0085g-unreacted multiphase CCT=75270.0746g-Red 20.0135g-Blue 2

Even Better!

0.0083g- Blue 3 0.0005g- Deep Red0.0002g-Yellow 2

CRI Ra92.4 (5135K)

CRI R197.4 (5135K)

CRI R292.9 (5135K)

CRI R388.3 (5135K)

CRI R488.6 (5135K)

CRI R595.1 (5135K)

CRI R694.2 (5135K)

CRI R789.2 (5135K)

CRI R893.4 (5135K)

CRI R995.7 (5135K)

CRI R1083.2 (5135K)

CRI R1192.9 (5135K)

CRI R1268.5 (5135K)

CRI R1390.4 (5135K)

CRI R1491.6 (5135K)

CRI R1587.9 (5135K)

My Role• Worked toward finding the optimal phosphor mixture

• Produced a wide variety of phosphor compositions• Researched the outcome of countless mixtures of phosphors• Studied color science and photonics

• Worked toward creating a multiphase phosphor• From mixture findings engineered single phosphors to match the

properties of the most successful mixtures

Measuring check depth • Vickers indents were done on

glass compositions 2318 and soda lime glass

– The indentations (checks) were then viewed and measured via optical microscope through the polished edge of the unbroken sample

– These measurements were compared to those of the broken fracture surface containing the check

– Challenges included lighting and observing the check while focusing through glass

Results • While it is possible to measure check depth through a polished edge, this is not as accurate as measuring the features directly on the fracture surface.

• When indent is closed, there is still compression held on the crack tip (the leading edge of the check)

• This creates invisible sections of the check that can not be seen even under the best lighting and magnification

• The edge measurements we consistently 0.04-0.06 mm less than the surface measurement

Leaving Timing Marks

• Several methods of vibrations were explored to leave controlled tertiary Wallner lines in the glass

• Finger Drumming (Not enough to detect)• Sonic Transducer (Too much vibration which left

excessive damage)• Metal on metal drumming (Detectable, but difficult to

standardize with no force measurements)• Disk Piezoelectric contacts (Detectable and measurable

results)• Edge Piezoelectric contacts (Detectable and measurable

results)• Bar Piezoelectric contacts (Detectable and measurable

results)

Results

By using this method and the equation W × ν =VWhere W is the width of the timing mark, ν is the frequency of the electronic signal/ vibration and V is the crack velocity, the crack velocity can be found in all glass compositions tested.

A HW fracture test (on left) and a DT test (on right).The direction of crack propagation was left to right in both images and the max, min and average velocity was 609, 261, and 435 for HW and 516,258, and 499.9 mm/s for DT respectively

My Role • Designed and executed an experimental plan• Operated several mechanical fracture test devices • Learned the field of fractography and how to define

fracture modes and features• Became skilled with optical microscope procedures

• Analyzed data and concluded with numerical evidence

Questions?

?