Friday, January 26, 2024, 07:05

The coated container was wrapped in 4 Ta foil heatshield and left in evap2 over night to attain vacuum.

Target temperature on OMEGA= 1850-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= 230 A

Final TGHT current= ~700A (adjustable)

Heating autoramp starged at 1A/min on  TGHT  and TBHT to 120A

Then at 2 A/min  to =400 A TGHT and 230A TBHT

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

Initial IGP1= 5.7e-05 Torr

Friday, January 26, 2024, 09:20

Pressure starts increasing at 125 A on TGHT and TBHT.  Leaving it to equilibrate then will start ramping at 3A/min (1.5A/30s) to 700A on TGHT and 230A on TBHT

Friday, January 26, 2024, 13:18

leave sintering at 1838C .  Will start rampdown at 5 pm.

IGP1= 6.10e-06 Torr

TGHT=680A, 10.14V

TBHT = 230A, 3.13V

Friday, January 26, 2024, 16:52

IGP1 = 3.0e10-6 Torr

OMEGA=1821 C

start rampdown @-2A/min TGHT and -1A/min TBHT