Tuesday, March 18, 2025, 06:48

The coated container was wrapped in 4 Ta foil heatshields.

Vacuum IGP1 initial =9.1 e-07 Torr

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= ~400A (adjustable)

Heating autoramp starged a 2A/min on  TGHT   and TBHT

 to =300 A TGHT and 230A TBHT

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

Tuesday, March 18, 2025, 13:47

OMEGA read 1850C at 380A on TGHT.  The temperature dropped and current was raised to 390A, 6.5V on TGHT.

TBHT was kept at 230A, 3.2V

Temperature dropped to 1756 after 4 hours of sintering.  Will start rampdown at -2A/min for TGHT and -1A/min TBHT.