Shear test with irradiated samples NA62 - DIPTEM Genova – UCL

5-09-2012

Shear tests with four different adhesive types:

Adhesive tapeNITTO DENKO 30 µm thick

Adhesive tape3M 9461P – 30 µm thick

Liquid glueAraldite 2020

Adhesive filmFastelFilm 30 µm thick

• Polyester film double coated by acrylic adhesive

• Polyester = 0.13-0.15 W/m K

Acrilyc = 0.2 W/m K

• 3M Adhesive 100 (Acrylic adhesive)

• 3M Adhesive 100 = 0.178 W/m K

• Two components epoxy liquid glue

• Epoxy = 0.188 W/m K

• EVA (Ethylene - vinyl Acetate) adhesive film

• EVA = 0.34 W/m K

⁻ Surface cleaning with acetone

⁻ 1 Kg for 65 hours

- Surface cleaning with acetone

- 1 Kg for 3 minutes- 80 °C in the oven (weight

and plate already hot)

⁻ Surface cleaning with acetone

⁻ Vacuum outgassing after mixing the component

⁻ Dispensing with a slice

⁻ Surface cleaning with acetone

⁻ 1 Kg for 65 hours

Silicon samples

Silicon samples 10 x 10 mm with wafers 525 µm thick

Silicon

glue

Silicon

Araldite: 25 samplesFastelFilm: 25 samplesNittoDenko: 25 samples3M: 25 samples

IrradiationIrradiation levels:- No irradiation- 3 x 10 13

- 1 x 10 14 nominal- 1 x 10 15

NITTO 3M FASTEL FILM ARALDITE

No irradiation

N001N002N003N004N005

M001M002M003M004M005

F001F002F003F004F005

A001A002A003A004A005

3 x 1013 N131N132N133N134N135

M131M132M133M134M135

F131F132F133F134F135

A131A132A133A134A135

1 x 1014

nominalN141N142N143N144N145

M141M142M143M144M145

F141F142F143F144F145

A141A142A143A144A145

1 x 1015 N151N152N153N154N155

M151M152M153M154M155

F151F152F153F154F155

A151A152A153A154A155

Spare NS6NS7NS8NS9NS0

MS6MS7MS8MS9MS0

FS6FS7FS8FS9FS0

AS6AS7AS8AS9AS0

Green = glued in Genova the 05-04-12 Red = glued at CERN the 22-05-12

Machine

Top clamp

Bottom clamp

INSTRON 8802 – Floor Model Fatigue Testing Systems up to 500 kN

Test procedureWorking set up

Stainless steel tool to performe the shear force on the samples

The tool has been inserted between the two plates of the machine

NITTO 3M FASTEL FILM ARALDITE

No irradiation N001N002N003N004N005

M001M002M003M004M005 (Si broken)

F001F002 (open)F003F004F005

A001 (Si broken)A002 (Si broken)A003 (Si broken)A004 (Si broken)A005 (Si broken)

3 x 1013 N131N132N133N134N135

M131M132M133M134 (Si broken)M135

F131F132 (open)F133F134F135

A131 (Si broken)A132 (Si broken)A133 (Si broken)A134 (Si broken)A135 (Si broken)

1 x 1014

nominalN141N142N143N144 (Si broken)N145

M141M142M143M144M145

F141F142 (open)F143 (Si broken)F144 (open)F145

A141 (Si broken)A142 (Si broken)A143 (Si broken)A144 (Si broken)A145 (Si broken)

1 x 1015 N151N152N153N154N155 (open)

M151M152M153M154M155

F151 (displaced)F152 (displaced)F153 (displaced)F154 (displaced)F155 (displaced)

A151 (Si broken)A152 (Si broken)A153 (Si broken)A154 (Si broken)A155 (Si broken)

Spare NS6NS7NS8NS9NS0

MS6MS7MS8MS9MS0

FS6FS7FS8 (open)FS9FS0 (open)

AS6 (Si broken)AS7 (Si broken)AS8 (Si broken)AS9 (Si broken)AS0 (Si broken)

Results – general outlook

NittoDenko – No irradiationF force (N)= σ * 100

D displacement (mm)= ε * 10

- First test (N001) ? Set up problems negletted

- Spare and no irradiation should have the same behavior!!

NittoDenko - 3 10 13 - 1 10 14 - 1 10 15 F force (N)= σ * 100

D displacement (mm)= ε * 10

For the first two radiations the adhesive becomes more rigid and stiff!In last case the adhesive is dead!

NittoDenko – Comparison

- Spare and no irradiation should have the same behavior!!

- The spread of the results is very small

Max value = 4.1 Mpa

3M – No irradiationF force (N)= σ * 100

D displacement (mm)= ε * 10

More or less same behavior!!

3M - 3 10 13 - 1 10 14 - 1 10 15 F force (N)= σ * 100

D displacement (mm)= ε * 10

For the first radiation the adhesive becomes more rigid and stiff! Then it starts to become softer in the last case the adhesive behaves like the non-irradiated one!

3M – Comparison

Max value = 4.5 Mpa

- First two equals!- Last case the adhesive is like

the non-irradiated one!

Fastelfilm – No irradiation F force (N)= σ * 100

D displacement (mm)= ε * 10

- Non repeatable!- Different behavior in this two

cases (????)

FastelFilm - 3 10 13 - 1 10 14

F force (N)= σ * 100

D displacement (mm)= ε * 10

First case is more rigid then it starts to melt under higher radiation!!!

FastelFilm – 1 10 15 F force (N)= σ * 100

D displacement (mm)= ε * 10

Tool broken: piece of silicon got stuck inside! re-machined the groove

FastelFilm – Comparison

Max value = 3.6 Mpa

The adhesive is thermoplastic, at high radiation it melts!(what’s the temperature inside the vessel during the irradiation???)

Araldite – No irradiation F force (N)= σ * 100

D displacement (mm)= ε * 10

New scale for the graphs! Values higher than for the

other adhesives!!!

Always tested the silicon!!!!

Araldite - 3 10 13 - 1 10 14 - 1 10 15 F force (N)= σ * 100

D displacement (mm)= ε * 10

The glue seems burned!!

Araldite – Comparison

Max value = 26 Mpa

The values are higher than before! We cannot say anything about the glue! (it is more resistant than silicon!!!!)