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Shear test with irradiated samples NA62 - DIPTEM Genova – UCL 5-09-2012

Shear test with irradiated samples NA62 - DIPTEM Genova – UCL 5-09-2012. Silicon samples. Silicon samples 10 x 10 mm with wafers 525 µm thick. Silicon. Shear tests with four different adhesive types:. Liquid glue Araldite 2020. A dhesive tape NITTO DENKO 30 µm thick. Adhesive tape

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Shear test with irradiated samples NA62 - DIPTEM Genova – UCL 5-09-2012

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  1. Shear test withirradiatedsamples NA62 - DIPTEM Genova – UCL 5-09-2012

  2. Siliconsamples Silicon samples 10 x 10 mm with wafers 525 µm thick Silicon Shear tests with four different adhesive types: Liquid glue Araldite 2020 Adhesive tape NITTO DENKO 30 µm thick Adhesive tape 3M 9461P – 30 µm thick Adhesive film FastelFilm 30 µm thick Silicon glue • 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 • EVA (Ethylene - vinyl Acetate) adhesive film • EVA = 0.34 W/m K • Two components epoxy liquid glue • Epoxy = 0.188 W/m K • 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 • Surface cleaning with acetone • 1 Kg for 65 hours

  3. Irradiation • Irradiation levels: • No irradiation • 3 x 10 13 • 1 x 10 14  nominal • 1 x 10 15 Araldite: 25 samples FastelFilm: 25 samples NittoDenko: 25 samples 3M: 25 samples Green = glued in Genova the 05-04-12 Red= gluedat CERN the 22-05-12

  4. Machine INSTRON 8802 – Floor Model Fatigue Testing Systems up to 500 kN Top clamp Bottom clamp

  5. Test procedure Working 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

  6. Results – general outlook

  7. NittoDenko – No irradiation • First test (N001) ? Set up problems  negletted • Spare and no irradiation should have the same behavior!! F force (N)= σ * 100 D displacement(mm)= ε * 10

  8. NittoDenko - 3 10 13 - 1 10 14- 1 10 15 For the first two radiations the adhesivebecomes more rigid and stiff! In last case the adhesiveisdead! F force (N)= σ * 100 D displacement(mm)= ε * 10

  9. NittoDenko – Comparison Max value = 4.1 Mpa • Spare and no irradiation should have the same behavior!! • The spread of the results is very small

  10. 3M – No irradiation More or lesssamebehavior!! F force (N)= σ * 100 D displacement(mm)= ε * 10

  11. 3M - 3 10 13 - 1 10 14- 1 10 15 For the first radiation the adhesivebecomes more rigid and stiff! Thenitstarts to becomesofter in the last case the adhesivebehaveslike the non-irradiated one! F force (N)= σ * 100 D displacement(mm)= ε * 10

  12. 3M – Comparison Max value = 4.5 Mpa • First twoequals! • Last case the adhesiveislike the non-irradiatedone!

  13. Fastelfilm – No irradiation • Non repeatable! • Differentbehavior in thistwo cases (????) F force (N)= σ * 100 D displacement(mm)= ε * 10

  14. FastelFilm - 3 10 13 - 1 10 14 First case is more rigidthenitstarts to meltunderhigher radiation!!! F force (N)= σ * 100 D displacement(mm)= ε * 10

  15. FastelFilm – 1 10 15 Toolbroken: piece of silicongotstuckinside!  re-machined the groove F force (N)= σ * 100 D displacement(mm)= ε * 10

  16. FastelFilm – Comparison Max value = 3.6 Mpa The adhesiveisthermoplastic, at high radiation itmelts! (what’s the temperatureinside the vesselduring the irradiation???)

  17. Araldite – No irradiation New scale for the graphs! Values higherthan for the otheradhesives!!! F force (N)= σ * 100 Alwaystested the silicon!!!! D displacement(mm)= ε * 10

  18. Araldite - 3 10 13 - 1 10 14- 1 10 15 The glue seemsburned!! F force (N)= σ * 100 D displacement(mm)= ε * 10

  19. Araldite – Comparison Max value = 26 Mpa The values are higherthanbefore! Wecannotsayanything about the glue! (itis more resistantthansilicon!!!!)

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