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EuCARD

Update on AIT's activities in manufacturing Cu-Dia with two coatings, thermal cycling tests, molding design, process optimization, and next steps for thermal and mechanical testing.

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EuCARD

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  1. EuCARD Status: March 2010

  2. Activities of AIT Manufacturing of Cu-Dia using two different alloying elements/coatings using conventional hot pressing technology Thermal cycling tests of materials with 50 vol% (CTE/diffusivity) Mould design for a Cu-Dia tile of 320mmx80mm First tests and assessment of temperature profile using this mold in combination with direct hot pressing Fabrication of a test part with optimised set-up Identification of processing parameters for 60 vol.% diamond using rapid hot pressing (tests on 10 mm samples) Modification of pressing die (10mm samples) due to minimum pressure requirement of Dr. Fritsch press.

  3. Thermal cycling behaviour (50 vol.%) Coefficient of Thermal Expansion Measurement cycle C4 4th cycle 300C Thermal cycling: C1: RT-300°C-RT C2: RT-300°C-RT C3: RT-800°C-RT C4: RT-300°C-RT C5: RT-300°C-RT C6: RT-300°C-RT C7: RT-300°C-RT C8: RT-300°C-RT C9: RT-300°C-RT C10: RT-300°C-RT

  4. Direct heated hot pressing hotpressing: • Heating rate: up to 400 K/min • Max. temperature: 2.400°C • Cycle time: < 1 hour

  5. Processing of demonstrator plate with 380 mmx80 mm

  6. Plans for next months Modification of pressing die for 320mm x 80 mm to improve the temperature homogenity Continue CTE measurements and thermal diffusivity measurements Prepare a 320 mm x80 mm plate for further thermal, mechanical testing with 60 vol.% of diamond

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