Progress of Cryogenics and Isotopes Separation , ISSN: 1582-2575
2004, Volume 7, Issue 13+14

Toughness Stand Modifications, Design for the Sample Specific Polystyrene Foam Like a Thermal Protection Envelope

Sebastian Brad * , M. Vijulie , Sorin Gherghinescu , C. Dragoiu , A. Lazar

National Institute of R&D for Cryogenics and Isotopes Technologies - ICIT Rm. Valcea Code 240050, Uzinei Street no.4, CP7 Raureni, Valcea, Romania

*Corresponding author: Sebastian Brad, e-mail:

Published: October 2004


Concerning older research, we developed onto the before designed equipment used for metallic toughness measurements in a large range of temperatures between 4 K until 500 K. The equipment has the facility to measure and control temperature with a high accuracy and also an automatic computer controlled data acquisition system.
In order to increase the accuracy of the testing and also to simplify the system, polystyrene foam has been used as a thermal protection envelope instead of the complicated and hard to be used cryostat.
From experimental dates obtained, it could be easy observed that the KCV(J) values measured on the improved system (which use the polystyrene jacket) are smaller than the first values set. The direct conclusion which could be drawn is that using the polystyrene new system the temperature measuring system is more accurate and the testing temperatures measured are more appropriate to the real ones.
Also, we wish to emphases that the new system could be considered as a significant simplification of the entire installation, which could be used for further design ofciyogenic equipments.


Metallic toughness, cryogenic.

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