RADIATION EFFECTS IN CARBONS AND GRAPHITES

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Two simultaneous effects occur during the irradiation of polycrystnlline graphite which account for the observed dimensional instability. The first is a disordering of the crystallites which results in an expansion parallel to the c axis and a contraction parallel to the a axis. This process is highly temperature dependent and at room temperature is the principal effect. The second effect is a nonannealable contraction, which acts primarily in the transverse direction in anisotropic nuclear graphite, and seems to occur primarily in the non-graphitic part of the polycrystalline structure. (auth)

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Pages: 20

Creation Information

Yoshikawa, H.H.; Woodruff, E.M.; Davidson, J.M.; Helm, J.W. & Nightingale, R.E. March 19, 1962.

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Description

Two simultaneous effects occur during the irradiation of polycrystnlline graphite which account for the observed dimensional instability. The first is a disordering of the crystallites which results in an expansion parallel to the c axis and a contraction parallel to the a axis. This process is highly temperature dependent and at room temperature is the principal effect. The second effect is a nonannealable contraction, which acts primarily in the transverse direction in anisotropic nuclear graphite, and seems to occur primarily in the non-graphitic part of the polycrystalline structure. (auth)

Physical Description

Pages: 20

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  • Other Information: Orig. Receipt Date: 31-DEC-63

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  • Report No.: HW-SA-2368
  • Grant Number: AT(45-1)-1350
  • DOI: 10.2172/4752202 | External Link
  • Office of Scientific & Technical Information Report Number: 4752202
  • Archival Resource Key: ark:/67531/metadc1027677

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • March 19, 1962

Added to The UNT Digital Library

  • Oct. 18, 2017, 7:39 a.m.

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  • Oct. 24, 2017, 3:15 p.m.

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Yoshikawa, H.H.; Woodruff, E.M.; Davidson, J.M.; Helm, J.W. & Nightingale, R.E. RADIATION EFFECTS IN CARBONS AND GRAPHITES, report, March 19, 1962; United States. (digital.library.unt.edu/ark:/67531/metadc1027677/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.