search.jsp?r=20070031887 2020-04-04t09:03:37+00:00z€¦ · solar absorptance and did not indicate...
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Thermal Control Materials on MISSE-5 with Comparison to Earlier Flight Data
MAria M. Finckenor
Mail Code EM50
Marshall Space Flight Center, AL 35812
Phone (256) 544-9244
miria.finckenor@nas a.gov
James M. Zwiener
AZ Technologies
7047 Old Madison Pike, Suite 300
Huntsville, AL 35806
Dr. Gary Pippin
Boeing Phantom Works
Renton, WA
A variety of thermal control materials were flown on the Materials on
International Space Station Experiment (MISSE)-5. Several types of beta cloth, as used
in multi-layer insulation blankets, were flown, including samples from the same batch as
used on the International Space Station. Two candidate sunshade materials for the James
Webb Space Telescope were also exposed on MISSE-5. The white thermal control
coating AZ93 was applied to Kapton instead of aluminum; this sample maintained good
solar absorptance and did not indicate any significant level of contamination to the
MISSE-5 experiment. Marker coatings maintained their color. Thermo-optical
properties are discussed, along with comparable data from MISSE-2 and the Passive
Optical Sample Assembly (POSA) - I experiments.
https://ntrs.nasa.gov/search.jsp?R=20070031887 2020-04-24T00:02:23+00:00Z
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
Thermal Control Materials on MISSE-5
With Comparison to Earlier Flight Data
Miria M. Finckenor
NASA/Marshall Space Flight Center
James M. Zwiener
AZ Technologies, Huntsville, AL
Dr. Gary Pippin
Boeing Phantom Works, Renton, WA
National Space and Missile Materials Symposium
Keystone, CO
June 2007
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Thermal Control Materials on MISSE-5With Comparison to Earlier Flight Data
Materials on International Space Station Experiment (MISSE) - 5Deployed: August 3,2005 on STS-114Retrieved: September 15,2006 on STS-115
• Materials' Location on MISSE-5
• Environmental Exposure
• Effects on Coatings
• Thermal Control Coatings
• Marker / Astronaut Visual Aid Coatings
• Discussion and Conclusions
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Thermal Control Materials on MISSE-5With Comparison to Earlier Flight Data
Aluminized beta cloth Chemfab soap"Super" beta clothBlack beta cloth
Photo courtesy ofGlenn Research Center
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
"Super" beta clothSiO/Kapton E/VDASiOICPlIVDA
Photo courtesy of Glenn Research Center
AZ93 on KaptonBlack beta cloth
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
-,.. I-- -
•-.- --b .I- -~ - QIIII] ----- ~,~-
- _I·. -,~
mm-II-- • .0
_. " _I-Germanium on black KaptonGermanium on Kapton HN
Photo courtesy ofGlenn Research Center
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
AZ93 on beta clothMarker coatings on beta clothMarker coatings on Dutch Space glass cloth
Photo courtesy ofGlenn Research Center
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
Environmental Exposure
'-'-.I
N'4~A,
• ~1.8 x 1020 atoms/cm2 atomic oxygen (Kapton erosion)
• ~ 525 equivalent sun-hours UV
• >6,500 thermal cycles of +40/-40 °C
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
AZ93 on Kapton• Thinner layer than aluminum substrate• No indication of contamination at 400 nm knee
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Thermal Control Materials on MISSE-5With Comparison to Earlier Flight Data
MISSE-5 AZ93 on Kapton
P' •II(-- --
~
~....~
-
-
- Pre-flight a=0.207(black background)
-+- Post-flight a=0.219(alumnized Kaptonbackground)
".
100%
90%
80%
70%
Q) 60%(Jl:III- 50%(JQ)
l+=Q)
40%0:::
30%
20%
10%
0%
o 500 1000 1500
Wavelength (nm)
2000 2500 3000
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
MISSE-2 AZ93 Inorganic White Coating
"~
.A
-
-Pre-flight Control 0=0.151
--a- Pre-flight 2-E8-3 0=0.143
--&-- Pre-flight 2-E8-4 0=0.147
--+-Pre-flight 2-E8-5 0=0.149
--+- Post-flight Control 0=0.147
-+-- Post-flight 2-E8-3 0=0.150
- Post-flight 2-E8-4 0=0.149
- Post-flight 2-E8-5 0=0.152
r-
100%
90%
80%
70%
Gl 60%uc:III- 50%uGl
;;:Gl
0::: 40%
30%
20%
10%
0%
250 500 750 1000 1250 1500 1750
Wavelength (nm)
2000 2250 2500
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Thermal Control Materials on MISSE-5With Comparison to Earlier Flight Data
, .~45A,
AZ93 on Beta Cloth looks white.Change in reflectance spectra may indicate darkening ofbeta cloth underneath coating.
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Thermal Control Materials on MISSE-5With Comparison to Earlier Flight Data
MISSE-5 AZ93 on Beta ClothNo Aluminization
r I
V- "--.:: ....~
~~ '--~
--
- Pre-Flight a=O.167
--MISSE5 a=O.195
Wavelength (nm)
100%
90%
80%
70%
Ql 60%(,)c:ra- 50%(,)Ql~Ql~ 40%
30%
20%
10%
0%250 500 750 1000 1250 1500 1750 2000 2250 2500
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
Darkening of beta cloth without darkening of AZ93indicates more UV radiation than expected.
Darkening of this level has been simulated with 500 - 800 ESH in lab.
AZ93 on Beta Cloth
AMJ-700mU on Beta Cloth
AZ93 on Kapton
Aluminized Beta Cloth
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Thermal Control Materials on MISSE-5With Comparison to Earlier Flight Data
MISSE Aluminized Beta ClothISS Batch
...Io..lI<-
r: _!! ~ ......
-Control a=0.343
II! -tl-MISSE-2 Ram a=O.368
~___ MISSE-2 Wake a=0.385
___ MISSE-5 A-1 a=O.366
--..- MISSE-5 A-2 a=0.362
"~
100%
90%
80%
70%
~ 60%c:Cll
~ 50%
& 40%
30%
20%
10%
0%
250 500 750 1000 1250 1500
Wavelength (nm)
1750 2000 2250 2500
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
AMJ-750LSBU
AMJ-700IBU --+--
AMJ-760LSBU
I '
N'~§A, ,
Ground sampleDutch Spacecloth
TMJ-20LSB
TMS-800IY
These coatings (on aluminum) also performed well on MISSE-l and -2.
Some MISSE-5 marker coatings were screen printed on Dutch Spaceglass cloth/Kapton film
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
Dutch Space Glass Cloth on Kapton
100% .-------,...-----,...-----,...-----,...-----,...-----,
-Ground control
---- Edge of 1-4
-A- Edge of W-130% -j-----a--+_----+_----+_-----j
~~ 60% -j----f1~+_----+_----+_----+_----+_---_1s::C'CI-(J 50% -j----ff~+_----+_----+_----+_----+_---_1(1)
'Qj0:: 40% -j----ft--+_----+_----+_-----j
20% -j----I/--+_----+_----+_----+_----+_----I
0% +------+_----+-----+-----+-----+----_1
.::10% -j--_Ir--_+_----+_----+_----+_----+_---_1
3000250020001500
Wavelength (nm)
1000500o
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
SiO/Kapton E/VDA SiO/CP l/VDA
Black beta cloth
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
MISSE Black Beta Cloth
-
-
- Pre-flight a=0.954-
-+- MISSE5 A-4 a=0.965
-e- MISSE5 N-4 a-0.964
iiiiii .~-. .- .- •.
100%
90%
80%
70%
Q) 60%CJl::::1Il- 50%CJQ)
;;::Q)
0::: 40%
30%
20%
10%
0%
250 500 750 1000 1250 1500 1750
Wavelength (nm)
2000 2250 2500
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--~ .....v~ --~
- -
I - Pre-flight a=0.409
-.... Post-flight a=0.404---
100%
90%
80%
70%
Ql 60%(Jc::III- 50%(JQl;:Ql0:: 40%
30%
20%
10%
0%
o 500
Thermal Control Materials on MISSE-5With Comparison to Earlier Flight Data
MISSE-5 SiO I Kapton E I VDACandidate for JWST Sunshield
1000 1500 2000
Wavelength (nm)
2500 3000
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
Kapton E I VDA on MISSE-2No SiO Coating
30002500
2·E8·23 1
200015001000
-Pre-flight a = 0.324 £ = 0.69
........ Post-flight a = 0.315 £ = 0.68
500
100%
90%
80%
70%
Gl60%u
cCll...u
50%Gl;:GlIt:~ 40%0
30%
20%
10%
0%0
Wavelength (nm)
Note: sample was exposed to UV and no AO through magnesium fluoride window
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-- •- ..... .A. ~
- .rI""'" -- a·
~
-
- Pre-flight a=0.244
--MISSE 2-E7-15 a=0.278
--MISSE5 N-5 a=0.247
~
r
100%
90%
80%
70%
Q) 60%uc:C1I- 50%uQ)
;;::::Q)
40%0::
30%
20%
10%
0%
o 500
Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
SiO I CP1 I VDACandidate for JWST Sunshade
1000 1500 2000
Wavelength (nm)
2500 3000
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
w~~~: a.-.-.~-; -.I- i.'"~-. I
I, ,; : ..i\ ; ...
• ~I
" •.,"II
I ,;
•~I I. ...... ' .I ••
I .'~ •L_...:!"!' _~
Germanium on Kapton and black KaptonSimilar materials flown on Passive Optical Sample Assembly
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Thermal Control Materials on MISSE-5With Comparison to Earlier Flight Data
MISSE-5 Germanium/Kapton Post-flight
- -E y V~
/ ........ .-..._. ---; ~
It/ .......... £
~
"T\ .A ..-
~ III..
~
'\.\.:ij•...."
-+-Ge on Kaplan a=0.445 e=0.78R=1.2 - 1.4 E8 ohms/square
-+-Ge on Black Kaplan a=0.549 e=0.82R=4.0 - 4.2 E6 ohms/square
100%
90%
80%
70%
\I) 60%ul:I'G- 50%uQ)
;;:Q)
a::: 40%
30%
20%
10%
0%
o 500 1000 1500 2000
Wavelength (nm)
2500 3000
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
POSA-I Germanium on Black Kapton
,N'4SA, ,
iii//" h.. ...I-x / V
-
""'"-./7~
J- Pre-flight a=0.441 e=0.85
--Post-flight a=0.527 e=0.83
100%
90%
80%
70%
Q) 60%(,)s::ns- 50%(,)Q)
;;::Q)
~ 40%
30%
20%
10%
0%
250 500 750 1000 1250 1500 1750
Wavelength (nm)
2000 2250 2500
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Thermal Control Materials on MISSE-SWith Comparison to Earlier Flight Data
POSA-I Germanium on Kapton
-..... -- •
0..--.- -...
f.-~V//
rt'
!~ I~ \J
-.y ~
rr..\..- -Pre-flight a=0.469 e=0.44
---- Post-flight a=0.544 e=0.44
100%
90%
80%
70%
Q) 60%(Jc:ra- 50%(JQ)
;0:Q)
0::: 40%
30%
20%
10%
0%
250 500 750 1000 1250 1500 1750
Wavelength (nm)
2000 2250 2500
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Thermal Control Materials on MJSSE-5With Comparison to Earlier Flight Data
Conclusions
I
N'~SA, ,
• Coatings, particularly AZ93 zinc oxide pigment with inorganic binder, held up
well in LEO {AO+UV} environment.
• No evidence of significant contamination.
• Marker / Label coatings maintained their color.
• Beta cloth darkened due to UV exposure. Solar absorptance was in
agreement with previous MISSE exposure.
• Candidate JWST sunshade materials held up well.
• Germanium-coated Kapton maintained better than 1 x 109 Q/o surface
resistivity.