Friday, June 01, 2018, 11:20
Target boat was previously coated with TaC and sintered.
Two small C-inserts of ~2cm length were placed on Ta boat
Sample 1-sc: 15 discs of cast 3 made with 1-step cast method (UCx+foil 1.437 g)
Sample 2-sc: 24 discs from rejected discs of 2-step casting (UCx+foil 1.585 g)
Ta boat was wrapped with 3 layers of Ta-heat shield
The chamber is currently pumping down.
TGHT will be ramped up to 495A [same parameters used to reach 1910C in evap2 when sintering TaC coating - elog410 evap2]
Monday, June 04, 2018, 11:27
IG1 = 4e-7 Torr
Tapped up manually to 35A
Waited 1hr
Vacuum stable.
IG1 = 8.02e-7 Torr.
Initiating auto-ramp (0.1 A/min) up to 80 A
Tuesday, June 07, 2018, 15:47
Vacuum stable
IG1 = 7.02e-7 Torr.
Changing auto-ramp to 0.02 A/min up to 140 A
Thursday, June 07, 2018, 15:49
Vacuum stable 5.5e-7 Torr
Current 139 A, voltage 1.25 V
Changing auto-ramp to 0.1 A/min up to 495
Saturday, June 9, 2018, 10:41
The material stayed 4 hours at 495 A
Auto-ramp set to -1 A/min down to 0 A
Monday, June 11, 2018, 17:43
EVAPI was vented with Ar and UCx was transferred to glove box
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