page 1 of 24 designing multi-anvil assemblies: the compres cell assembly project kurt leinenweber

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Designing multi-anvil assemblies:Designing multi-anvil assemblies:The COMPRES cell assembly The COMPRES cell assembly

projectproject

Kurt LeinenweberKurt Leinenweber

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Challenges:Challenges:

• Thermocouple has to work wellThermocouple has to work well

• Wide range of P and T desirable for Wide range of P and T desirable for each assemblyeach assembly

• Easy to assembleEasy to assemble

• Not expensiveNot expensive

• Specs have to be repeatable from year Specs have to be repeatable from year to year (well-documented)to year (well-documented)

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Five sizes of octahedra - 8 mm, 10 mm, 14 mm, 18 mm and 25 mm - used in the COMPRES assemblies.

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The octahedra showing the sample holes already molded in.

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GasketingGasketing

Gasket setup using pre-cut paper and pre-milled gaskets, shown on the bottom 4 cubes of the “nest.”

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Gasketing (cont.)Gasketing (cont.)

Pre-cut paper that is used to position the gaskets.

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ASU’s shop foreman, Rick Flubacher, and an automated mill.

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Trial milling of pyrophyllite gaskets on a programmable mill.


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COMPRES machinist, Brian Nagy, and the COMPRES automated lathe.


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Cutting thermocouple slots in a lanthanum chromite sleeve for the 8/3 assembly on the automated lathe.

AssemblyAssembly

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Rhenium furnace (size 5.4 mm by 8 mm) cut using wire EDM (Electrical Discharge Machining), for the 8/3 assembly.

Assembly (cont.)Assembly (cont.)

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The 8/3 assembly with the lanthanum chromite sleeve and the rhenium furnace in place.

Assembly (cont.)Assembly (cont.)

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Beam path (green) through the 8/3 assembly (courtesy of Emmanuel Soignard).

Modification for x-rayModification for x-ray

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NEW: Special rhenium furnace design for in-situ x-ray experiments in the 8/3 assembly, including a central slit for the x-ray beam.

Modification for x-ray (cont.)Modification for x-ray (cont.)

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“COMPRES care packages” ready for shipping.

TestingTesting

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“Big blue” multi-anvil at ASU (frame is from Clifton Fluid Power, Inc.; module made in-house).

Testing (cont).Testing (cont).

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14/8 “G2” assembly after squeezing.

Testing (cont).Testing (cont).

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Results for three “locked” assembliesResults for three “locked” assemblies

• Calibration curves• Success rates• Suitability for offline and in-situ work

• (note: because development of too many new things can be confusing, we “lock” certain designs so that they won’t change, while we continue to develop others).

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14/8 “Caltech” assembly (lanthanum chromite step-heater)

14/8 “Caltech” assembly14/8 “Caltech” assembly

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14/8 “Caltech” assembly thermal profile14/8 “Caltech” assembly thermal profile

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14/8 “G2” assembly14/8 “G2” assembly

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8/3 assembly8/3 assembly

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8/3 assembly (cont): room temperature calibration.8/3 assembly (cont): room temperature calibration.

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8/3 assembly (cont.): Thermal profile.8/3 assembly (cont.): Thermal profile.

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8/3 assembly (cont.) Effect of temperature on pressure.8/3 assembly (cont.) Effect of temperature on pressure.

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10/5 “Tami” assembly10/5 “Tami” assembly10/5 Power Curve from APS experiments

0

50

100

150

200

250

300

350

400

450

500

0 200 400 600 800 1000 1200 1400 1600

Temperature (oC)

Po

we

r (W

)

T0556

T0558

T0560

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Pressure Calibration of 10/5 Assembly (CsCl pressure standard)

0

5

10

15

20

25

0 100 200 300 400 500 600 700 800

Force (Tons)

Pre

ssu

re (

GP

a)

1000oC

25oC

10/5 “Tami” assembly (cont.): Pressure calibration10/5 “Tami” assembly (cont.): Pressure calibration

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Effect of temperature on pressure of 10/5 assembly (CsCl pressure standard)

10

12

14

16

18

20

22

0 200 400 600 800 1000 1200 1400 1600

Temperature (oC)

Pre

ssu

re (

GP

a)

700 tons

500 tons

400 tons

10/5 assembly (cont.): Effect of temperature on pressure10/5 assembly (cont.): Effect of temperature on pressure

page 1 of 24 designing multi-anvil assemblies: the compres cell assembly project kurt leinenweber

Documents

caltech assembly slide

tami assembly slide

g2 assembly slide

xray slide

testing slide

pressure calibration

assembly easy

assembly cont