Influence of temperature upon elastic limit and dislocation mobility of single-crystal HgI/sub 2/

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There are three primary observations obtained from the present work. First, the initial CRSS, i.e., the stress at which plastic deformation first occurs on the c shear planes, seems to be as low as 0.8 kpa (0.1 psi) and may, in fact, be much lower. This very low yield behavior, if confirmed by other tests, can be an important consideration in crystal growth and detector fabrication. Second, workhardened single crystals of mercuric iodide soften and become more ductile with increased temperatures. Third, hard glide dislocations are generated more easily and become more mobile at higher temperatures. These last two are ... continued below

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Pages: 26

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Milstein, F.; Farber, B.; Kim, K.; van den Berg, L. & Schnepple, W. January 1, 1982.

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Description

There are three primary observations obtained from the present work. First, the initial CRSS, i.e., the stress at which plastic deformation first occurs on the c shear planes, seems to be as low as 0.8 kpa (0.1 psi) and may, in fact, be much lower. This very low yield behavior, if confirmed by other tests, can be an important consideration in crystal growth and detector fabrication. Second, workhardened single crystals of mercuric iodide soften and become more ductile with increased temperatures. Third, hard glide dislocations are generated more easily and become more mobile at higher temperatures. These last two are intimately linked. The mobility of the hard glide dislocations at the higher temperatures allow for easier slip, thus lowering the yield stresses and increasing the ductility.

Physical Description

Pages: 26

Notes

NTIS, PC A03/MF A01.

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  • 5. international workshop on HgI/sub 2/ nuclear radiation detectors, Jerusalem, Israel, 6 Jun 1982

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  • Other: DE82017694
  • Report No.: CONF-820667-3
  • Grant Number: AC08-76NV01183
  • Office of Scientific & Technical Information Report Number: 5253909
  • Archival Resource Key: ark:/67531/metadc1070896

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  • January 1, 1982

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  • Feb. 4, 2018, 10:51 a.m.

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  • April 4, 2018, 12:43 p.m.

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Milstein, F.; Farber, B.; Kim, K.; van den Berg, L. & Schnepple, W. Influence of temperature upon elastic limit and dislocation mobility of single-crystal HgI/sub 2/, article, January 1, 1982; United States. (digital.library.unt.edu/ark:/67531/metadc1070896/: accessed September 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.