search.jsp?R=20070031887 2020-04-04T09:03:37+00:00Z€¦ · solar absorptance and did not indicate...

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

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

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


Aluminized beta cloth Chemfab soap"Super" beta clothBlack beta cloth

Photo courtesy ofGlenn Research Center


"Super" beta clothSiO/Kapton E/VDASiOICPlIVDA

Photo courtesy of Glenn Research Center

AZ93 on KaptonBlack beta cloth


-,.. I-- -

•-.- --b .I- -~ - QIIII] ----- ~,~-

- _I·. -,~

mm-II-- • .0

_. " _I-Germanium on black KaptonGermanium on Kapton HN



AZ93 on beta clothMarker coatings on beta clothMarker coatings on Dutch Space glass cloth



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


AZ93 on Kapton• Thinner layer than aluminum substrate• No indication of contamination at 400 nm knee


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


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


, .~45A,

AZ93 on Beta Cloth looks white.Change in reflectance spectra may indicate darkening ofbeta cloth underneath coating.


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


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


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


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


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


SiO/Kapton E/VDA SiO/CP l/VDA

Black beta cloth


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

--~ .....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


MISSE-5 SiO I Kapton E I VDACandidate for JWST Sunshield

1000 1500 2000

Wavelength (nm)

2500 3000


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

-- •- ..... .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


SiO I CP1 I VDACandidate for JWST Sunshade

1000 1500 2000

Wavelength (nm)

2500 3000


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


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


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


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

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.

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