Department of Mechanical Engineering Department of ...
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Measurement of Multi-Layer Coatings of FEF Sensor with an Overview of SEAL Laboratory Activities Hsiu-Che Wang 1 and Alexander V. Mamishev 2 1 Department of Mechanical Engineering 2 Department of Electrical Engineering University of Washington Nov. 2, 2010
Transcript of Department of Mechanical Engineering Department of ...
Measurement of Multi-Layer Coatings of FEF Sensor with an Overview of SEAL
Laboratory Activities
Hsiu-Che Wang1 andAlexander V. Mamishev2
1Department of Mechanical Engineering2Department of Electrical Engineering
University of WashingtonNov. 2, 2010
Outline
SEAL Laboratory ActivitiesSensitive SkinDietary Data Recording SystemMicrocoolingMeasurement of Multi-Layer Coatings Using
FEF Sensors
SEAL Laboratory Activities
Sensitive Skin
Dietary Data Recording System
Smart phoneLaser Grating
ClientServer
Survey, video and sensor data
Survey, control of data
collection
Database, volume
estimation
Nutrition analysis based
on data and survey
Survey, audio, and volume data
Engineers and clinicians working together
Different engineering problems
Microcooling
90°C
Electrospray CoolingDevice
Measurement of Multi-Layer Coatings Using Fringing Electric Field Sensors
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IntroductionCoatings are applied to aircraft’s parts body and partsmainly as a defense against corrosion, abrasion, anddegradation frequently caused by chemical contamination andUV radiation.
Repainting of military aircraft is recommended every 8 to 12years and of commercial airliners every 4 years. Coatingremoval is expensive and generates hazardous waste.
The ability to verify the still coating characteristics couldminimize or eliminate the need for coat stripping andreapplying during manufacturing.
The motivation is to design, develop, and fabricate anon-contact multi-layer coating fringing electric fieldsensor capable of measuring the coating thickness ofindividual layers of a multi-layer coating stack used onmilitary and commercial aircraft. The senor can be usedto measure partially dried coatings during automatedpainting process.
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Motivation
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MagRAM is the layer of most interest at this point.
The Multi-Layer Coating Stack
Substrate = graphite‐epoxy composite (100 – 260 mils)
Primer (0.6 – 1.1 DFT mils)
Conductive Coating (2.5 – 4.0 DFT mils)
Primer (0.6 – 1.1 DFT mils)
MagRAM (20 – 80 mils)
Topcoat (1.4 – 2.8 DFT mils)
Primer (0.6 – 1.1 DFT mils)
Aircraft with MagRAM coating
Design Manufacturer # Built Status
F-35 Lightning II Lockheed Martin None In development
F-22 Raptor
Lockheed Martin / Boeing
151 built as of Dec. 09, 187 planned In service
B-2 Spirit
Northrop Grumman 21 built In service
F-117 Nighthawk Lockheed Martin 64 built Retired
Pictures: www.airliners.net
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MagRAM
Magnetic Radar Absorbent Material is used in stealthtechnology to disguise a structure from radar detection.
Common forms of MagRAM
Common form Application
Neoprene polymer sheets with ferrite grains or carbon black particles
Tiles of this material were used on early versions of the F-117A Nighthawk
Iron ball paint (contains tiny spears coated with carbonyl iron or ferrite) Also used on the F-117
MagRAM paint made from ferrofluidic and non-magnetic substances Used by the US Air Force
Available MagRAM Products
Flexible magRAM sheets Silicone rubber based material
MagRAM paint Coated carbonyl iron based paint in a proprietary urethane acrylic resin
The dielectrometry instrument: DS-1 and allrequired software. Fringing electric field (FEF) sensors
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Measurement Systemt
DS-1 Meter
Graphical User Interface
DS-1 Software
Modeling
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Key Results
Gold micacoating
MagRAM thickness (mm)
0.0 1.0 2.0 3.0 4.0
Cap
acita
nce
(F)
20x10-12
40x10-12
60x10-12
80x10-12
100x10-12
120x10-12
Sensor-1 (160 mils PD)Sensor-2 (80 mils PD)Sensor-3 (80 mils PD)Sensor-4 (40 mils PD)Sensor-5 (17 mils PD)
MagRAM thickness (mm)
0.0 1.0 2.0 3.0 4.0
Cap
acita
nce
(F)
100x10-12
200x10-12
300x10-12
400x10-12
Sensor-1 (160 mils PD)Sensor-2 (80 mils PD)Sensor-3 (80 mils PD)Sensor-4 (40 mils PD)Sensor-5 (17 mils PD)
Average MagRAM thickness (mm)
0.0 0.2 0.4 0.6 0.8 1.0
Cap
acita
nce
sens
itivi
ty (F
/mm
)
0
20x10-12
40x10-12
60x10-12
80x10-12
100x10-12
Sensor-1 (160 mils PD)Sensor-2 (80 mils PD)Sensor-3 (80 mils PD)Sensor-4 (40 mils PD)Sensor-5 (17 mils PD)
Average MagRAM thickness (mm)
0.0 0.2 0.4 0.6 0.8 1.0
Cap
acita
nce
sens
itivi
ty (F
/mm
)
0
10x10-9
40x10-9
50x10-9
Sensor-1 (160 mils PD)Sensor-2 (80 mils PD)Sensor-3 (80 mils PD)Sensor-4 (40 mils PD)Sensor-5 (17 mils PD)
Pure MagRAM paintMagRAM paint coated on
metal substrates
MagRAM paint coated on a metal substrate
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Key Results
Frequency (Hz)
100x10-3 1x100 10x100 100x100 1x103 10x103 100x103 1x106 10x106 100x106
Cap
acita
nce
(F)
2x10-12
3x10-12
4x10-12
5x10-12
6x10-12
7x10-12
00 mils20 mils40 mils60 mils80 milsAir
Gold micacoating
Thickness of the MagRAM coating (mils)
Air 0 20 40 60 80
Cap
acita
nce
(F)
2.4x10-12
2.6x10-12
2.8x10-12
3.0x10-12
3.2x10-12
3.4x10-12
3.6x10-12
3.8x10-12
4.0x10-12
4.2x10-12
4.4x10-12
4.6x10-12
1,000 Hz10,000 Hz100,000 Hz1,000,000 Hz
MagRAM sheets
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Key Results
Gold micacoating
Frequency (Hz)
1x100 10x100 100x100 1x103 10x103 100x103 1x106
Cap
acita
nce
(F)
0
10x10-12
20x10-12
30x10-12
40x10-12
30 mils40 mils50 mils60 mils75 mils
Frequency (Hz)
1x106 10x106
Cap
acita
nce
(F)
0
50x10-12
100x10-12
150x10-12
200x10-12
250x10-12
300x10-12
30 mils40 mils50 mils60 mils75 mils
Frequency (Hz)
20x103 40x103 60x103 80x103 100x103
Cap
acita
nce
(F)
10x10-12
20x10-12
30x10-12
40x10-12
50x10-1240 % (30 mils)40 % (40 mils)40 % (50 mils)40 % (60 mils)40 % (75 mils)60 % (30 mils)60 % (40 mils)60 % (50 mils)60 % (60 mils)60 % (75 mils)80 % (30 mils) 80 % (40 mils) 80 % (50 mils) 80 % (60 mils) 80 % (75 mils)
Frequency (Hz)
100x10-3 1x100 10x100 100x100 1x103 10x103 100x103 1x106 10x106 100x106
Die
lect
ric c
onst
ant
0
5
10
15
20
25
30
35
30 mils40 mils50 mils60 mils75 mils
Boeing’s gold mica paint coated on commercialaircraft
Frequency (Hz)
1x103 10x103 100x103
Cap
acita
nce
(F)
0
10x10-12
20x10-12
30x10-12
40x10-12
50x10-12
60x10-12
2 mils4 mils8 mils12 milsAir
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Key Results
Gold micacoating
Stealth Ships Stealth Drones Aircraft Paint Hangars General Coating Applications
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Possible Future Uses
Pictures: www.airliners.net
Simultaneous measurement using the multi-channel portable DS-1 dielectrometry instrument.
MagRAM sheet and Boeing’s gold mica samples. Thickness and coating loading.
Demo
Fringing Electric Field Sensors
DS-1
Graphical User Interface
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MagRAM sheet
Gold mica samples
Thank you…..Questions?
Hsiu-Che WangDepartment of Mechanical Engineering
University of WashingtonSeattle, WA, USA
