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Message ID: 291     Entry time: Tuesday, April 26, 2016, 13:50
Author: Laura Lambert 
Target Material: Empty 
Target Oven W.O#: 40860-2 
Source: LP-IG-LIS 
Status: Done 
Subject: sintering TaC coating on UCx#16 container 

Tuesday, April 26, 2016, 13:32

Container coated with TaC using 'flushing technique'.

Wrapped with 3 x Ta heat shields, incl center block - new method of each layer being one long single Ta foil covering entire container incl center block

Currently pumping down in evap2


 Wednesday, April 27, 2016, 10:25

IGP1 = 2.6e-7 Torr.

HS water valves opened, no leaks detected.

Tapped up manually to 35A.

Waited ~35min

Vacuum stable, IGP1 = 6.7e-7 Torr

Initiated auto-ramp at 0.2A/min for the TGHT with a final setpoint of 400A

Final desired temperature = 1900C


 Thursday, April 28, 2016, 14:41

Previously TBHT not on when sintering IGLIS container [since no ionizer tube] - John decided will turn on for this round

Tapped up TBHT manually to 140A, 1.69V

IGP1 = 4.5e-7 Torr

OMEGA = 1635C

TGHT = 382A, 5.8V

Initiating auto-ramp of TBHT at 0.1A/min with a final setpoint of 230A.


Friday, April 29, 2016, 08:40

IGP1 = 2.22-7 Torr

TGHT = 400A, 6.1V

TBHT = 233A, 2.9V

OMEGA = 1719C

Tapping up manually to OMEGA = 1900C


Friday, April 29, 2016, 15:22

IGP1 = 3.0e-7 Torr

TGHT = 460A, 7.52V

TBHT =230A, 2.93V

OMEGA = 1904C

Target container has remained at max temperature setpoint of 1900C for 4.5hrs.

Initiating auto cool for TGHT and TBHT at 2.0A/min and 1.0A/min respectively.


 Monday, May 02, 2016, 08:35

Vented in air and opened up this morning.

Container looks good.

See attached photos.


 

Attachment 1: TaC_coating_sintered1.jpg  958 kB  Uploaded Monday, May 02, 2016, 12:38  | Hide | Hide all
TaC_coating_sintered1.jpg
Attachment 2: TaC_coating_sintered2.jpg  896 kB  Uploaded Monday, May 02, 2016, 12:38  | Show | Hide all
Attachment 3: TaC_coating_sintered3.jpg  820 kB  Uploaded Monday, May 02, 2016, 12:39  | Show | Hide all
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