Material processing and surface reaction studies in free piston driven shock tube

Indigenously designed and fabricated free piston driven shock tube (FPST) was used to generate strong shock heated test gases for the study of aero-thermodynamic reactions on ceramic materials. The reflected shock wave at the end of the shock tube generates high pressure and temperature test gas (Argon, Ar) for short duration. Interaction of materials with shock heated Ar gas leads to formation of a new solid or stabilization of a material in new crystallographic phase. In this shock tube, the generated shock waves was utilized to heat Ar to a very high temperature (11760 K) at about 40-55 bar for 2-4 ms. We confirmed the phase transformation and electronic structure of the material after exposure to shock by XRD and XPS studies. This high enthalpy gas generated in the shock-tube was utilized to synthesize cubic perovskite CeCrO3from fluorite Ce0.5Cr0.5O2+δoxide. We were able to demonstrate that this ceramic materials undergoes phase transformations with the interaction of high enthalpy gas under shock dynamic loading.

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0910 Numerical Simulation of Piston Compression Process in Free Piston Type Shock Tube

The Proceedings of the Fluids engineering conference ◽

10.1299/jsmefed.2013._0910-01_ ◽

2013 ◽

Vol 2013 (0) ◽

pp. _0910-01_-_0910-02_

Author(s):

Atsushi Matsuda ◽

Kenji Nagata

Keyword(s):

Numerical Simulation ◽

Shock Tube ◽

Compression Process ◽

Free Piston

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An Experimental Evaluation of Shock Wave Strength and Peak Pressure in a Conventional Shock Tube and a Free-Piston Compressor

Volume 1: Advances in Aerospace Technology ◽

10.1115/imece2008-66246 ◽

2008 ◽

Author(s):

Amir Al-Falahi ◽

M. Z. Yusoff ◽

T. Yusaf

Keyword(s):

Shock Tube ◽

Peak Pressure ◽

Piston Compressor ◽

Experimental Measurements ◽

Shock Strength ◽

Free Piston ◽

Significant Information ◽

Surface Temperature Change ◽

Operation Conditions

The aim of this work is to provide a comparative experimental study on the performance of the conventional shock tube and a free-piston compressor. Experimental measurements of shock strength, peak pressure and surface temperature change of air-air as a driver/driven gas are then presented and compared with another set of experimental measurements using gas combination of He-air. The results provide very good estimates for the above mentioned parameters obtained after diaphragm rupture and also provide significant information on the role of the free piston in the facility operation conditions over the full length of the facility.

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Burst-Mode Coherent Anti-Stokes Raman Scattering N2Thermometry in the Sandia Free-Piston Shock Tube

10.2514/6.2022-0894 ◽

2022 ◽

Author(s):

Sean P. Kearney ◽

Kyle Daniel ◽

Justin L. Wagner ◽

Kyle P. Lynch ◽

Charley R. Downing ◽

...

Keyword(s):

Raman Scattering ◽

Shock Tube ◽

Free Piston ◽

Burst Mode ◽

Anti Stokes

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Development of Velocity Interferometer and its Application to Piston Motion Measurement in a Compression Tube of Free Piston Shock Tube.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B ◽

10.1299/kikaib.65.3294 ◽

1999 ◽

Vol 65 (638) ◽

pp. 3294-3304

Author(s):

Kensuke KOREMOTO ◽

Tokitada HASHIMOTO ◽

Kazuyoshi TAKAYAMA ◽

Katsuhiro ITOH

Keyword(s):

Shock Tube ◽

Piston Motion ◽

Free Piston ◽

Motion Measurement

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Laser Chemical Etching of Conducting and Semiconducting Materials

MRS Proceedings ◽

10.1557/proc-17-45 ◽

1982 ◽

Vol 17 ◽

Cited By ~ 10

Author(s):

T. J. Chuang

Keyword(s):

Material Processing ◽

Laser Radiation ◽

Reaction Mechanisms ◽

Chemical Etching ◽

Surface Reaction ◽

Semiconducting Materials ◽

Laser Method ◽

Experimental Approaches ◽

Product Species ◽

Insight Into

ABSTRACTThe purpose of the paper is to examine the basic processes involved in the laser-enhanced chemical etching of solids. Specifically, the process of chemisorption, the reaction between the adsorbate and substrate atoms and the vaporization of product species affected by the laser radiation are discussed. It is shown that the laser method can provide important insight into the gas-surface reaction mechanisms. In addition, a number of examples are given to demonstrate the potential of the technique for applications to material processing. Some current studies on the laser-induced chemical etching of materials relevant to microelectronics are reviewed. Certain practical experimental approaches are also considered.

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