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Title: Evaluation of potential cold x-ray shield materials tested on Proto II

Abstract

Several composite materials were irradiated with cold x-rays of photon energies of 1 and 3 keV line radiation generated by imploding Ne and Ar gas using the Proto II accelerator. The materials were exposed to fluences of up to 60 cal/cm{sup 2}. Continuous reinforced carbon phenolic and carbon-carbon composites and an inorganic rigid SiO{sub 2} fiber-Al{sub 2}O{sub 3} fiber composite were tested. Examination of the irradiated surfaces of all materials revealed varying degrees and types of damage with fluences levels. The surface of irradiated reinforced carbon phenolic (RCP) composite was characterized by blowoff debris and melting of the matrix resin. The melt depth of RCP materials increased as the fluence increased. Surface fibers of irradiated inorganic fibrous composite (IFC) exhibited severe melting, but the extent of surface blowoff debris was considerably less than that of RCP materials. Both melting and blowoff were minimal on the surface of irradiated reinforced carbon-carbon (RCC) composite, even at high fluence levels. Interior spall and delamination were seen in exposed RCP material above an apparent threshold fluence of {approximately}15 cal/cm{sup 2}. However, no internal structural damage was observed in either RCC or the IFC composites at the maximum fluence levels tested of 9 and 17more » cal/cm{sup 2}, respectively. Of the composite materials tested, RCC appeared to be the most attractive material for cold x-ray shielding based on its resistance to debris blowoff from vaporization, surface melting and interior structural damage. 9 refs., 16 figs.« less

Authors:
Publication Date:
Research Org.:
Sandia National Labs., Livermore, CA (USA)
Sponsoring Org.:
DOE/DP
OSTI Identifier:
5371054
Report Number(s):
SAND-89-8224
ON: DE90004348
DOE Contract Number:  
AC04-76DR00789
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPOSITE MATERIALS; PHYSICAL RADIATION EFFECTS; SHIELDING MATERIALS; MATERIALS TESTING; ALUMINIUM OXIDES; FIBERS; IRRADIATION; MECHANICAL PROPERTIES; MELTING; SILICON OXIDES; X RADIATION; ALUMINIUM COMPOUNDS; CHALCOGENIDES; ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; MATERIALS; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; RADIATION EFFECTS; RADIATIONS; SILICON COMPOUNDS; TESTING; 360605* - Materials- Radiation Effects

Citation Formats

Lucas, J P. Evaluation of potential cold x-ray shield materials tested on Proto II. United States: N. p., 1989. Web.
Lucas, J P. Evaluation of potential cold x-ray shield materials tested on Proto II. United States.
Lucas, J P. Fri . "Evaluation of potential cold x-ray shield materials tested on Proto II". United States.
@article{osti_5371054,
title = {Evaluation of potential cold x-ray shield materials tested on Proto II},
author = {Lucas, J P},
abstractNote = {Several composite materials were irradiated with cold x-rays of photon energies of 1 and 3 keV line radiation generated by imploding Ne and Ar gas using the Proto II accelerator. The materials were exposed to fluences of up to 60 cal/cm{sup 2}. Continuous reinforced carbon phenolic and carbon-carbon composites and an inorganic rigid SiO{sub 2} fiber-Al{sub 2}O{sub 3} fiber composite were tested. Examination of the irradiated surfaces of all materials revealed varying degrees and types of damage with fluences levels. The surface of irradiated reinforced carbon phenolic (RCP) composite was characterized by blowoff debris and melting of the matrix resin. The melt depth of RCP materials increased as the fluence increased. Surface fibers of irradiated inorganic fibrous composite (IFC) exhibited severe melting, but the extent of surface blowoff debris was considerably less than that of RCP materials. Both melting and blowoff were minimal on the surface of irradiated reinforced carbon-carbon (RCC) composite, even at high fluence levels. Interior spall and delamination were seen in exposed RCP material above an apparent threshold fluence of {approximately}15 cal/cm{sup 2}. However, no internal structural damage was observed in either RCC or the IFC composites at the maximum fluence levels tested of 9 and 17 cal/cm{sup 2}, respectively. Of the composite materials tested, RCC appeared to be the most attractive material for cold x-ray shielding based on its resistance to debris blowoff from vaporization, surface melting and interior structural damage. 9 refs., 16 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {12}
}

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