Dynamic diamond anvil cell (dDAC): a novel device for studying the dynamic-pressure properties of materials.
We have developed a unique device, a dynamic diamond anvil cell (dDAC), which repetitively applies a time-dependent load/pressure profile to a sample. This capability allows studies of the kinetics of phase transitions and metastable phases at compression (strain) rates of up to 500 GPa/s (approximately 0.16 s(-1) for a metal). Our approach adapts electromechanical piezoelectric actuators to a conventional diamond anvil cell design, which enables precise specification and control of a time-dependent applied load/pressure. Existing DAC instrumentation and experimental techniques are easily adapted to the dDAC to measure the properties of a sample under the varying load/pressure conditions. This capability addresses the sparsely studied regime of dynamic phenomena between static research (diamond anvil cells and large volume presses) and dynamic shock-driven experiments (gas guns, explosive, and laser shock). We present an overview of a variety of experimental measurements that can be made with this device.
Evans
William J
WJ
H-Division, Physics and Advanced Technologies, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551, USA. wjevans@llnl.gov
Yoo
Choong-Shik
CS
Lee
Geun Woo
GW
Cynn
Hyunchae
H
Lipp
Magnus J
MJ
Visbeck
Ken
K
D018130:Diamond; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006244:Hardness; D006245:Hardness Tests / Q000295:instrumentation* / Q000379:methods; D008365:Manometry / Q000295:instrumentation* / Q000379:methods; D008422:Materials Testing / Q000295:instrumentation* / Q000379:methods; D010812:Physical Stimulation / Q000295:instrumentation* / Q000379:methods; D011312:Pressure; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013048:Specimen Handling / Q000295:instrumentation* / Q000379:methods
D018130:Diamond