High-rate pressurization by drop-weight impact

Singh, AK (1994) High-rate pressurization by drop-weight impact. In: Proceedings of the National Conference on High Pressure Science and Technology, 10-11 Oct 1994, Bangalore, India.

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High-pressure pulse is generated in the gasket region when a tungsten carbide opposed anvil setup backed by a rigid support is impacted by a low-velocity projectile. The pressure increases linearly with time, except near the start and the peak of the pressure pulse. The pressurization-rate in the region of linearity can be varied over a range 0.01 to 0.1 GPa(as)-1 by varying the momentum of the projectile. The amplitude of the pressure-pulse increases with increasing pressurization-rate,and is -6.5 GPa at a pressurisation-rate 0.1GPa(as)-1. The pressure induced transitions in the bi and Yb have been examined under rapidly increasing pressures. It is found that Bi(I)-bi(II) transition is complete in -8as at a pressurization-rate 0.1 GPa(as_-1. The fcc- bcc transition in Yb can be considerably over-driven by rapid pressurisation

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: High pressure pulse;Pressurization;Low velocity projectile
Subjects: PHYSICS > Physics(General)
Depositing User: M/S ICAST NAL
Date Deposited: 21 Aug 2008
Last Modified: 17 Jun 2010 08:05
URI: http://nal-ir.nal.res.in/id/eprint/4826

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