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Title: Improved high temperature radiation damage tolerance in a three-phase ceramic with heterointerfaces

Journal Article · · Scientific Reports
 [1];  [2];  [3];  [4];  [3]; ORCiD logo [4];  [1]
  1. Univ. of California, Irvine, CA (United States). Dept. of Chemical Engineering & Materials Science
  2. Univ. of Liverpool (United Kingdom). Dept. of Mechanical, Materials & Aerospace Engineering; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
  3. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering. Ion Beam Materials Lab.
  4. Univ. of California, San Diego, CA (United States). Dept. of Mechanical and Aerospace Engineering

Radiation damage tolerance for a variety of ceramics at high temperatures depends on the material’s resistance to nucleation and growth of extended defects. Such processes are prevalent in ceramics employed for space, nuclear fission/fusion and nuclear waste environments. This report shows that random heterointerfaces in materials with sub-micron grains can act as highly efficient sinks for point defects compared to grain boundaries in single-phase materials. The concentration of dislocation loops in a radiation damage-prone phase (Al2O3) is significantly reduced when Al2O3 is a component of a composite system as opposed to a single-phase system. These results present a novel method for designing exceptionally radiation damage tolerant ceramics at high temperatures with a stable grain size, without requiring extensive interfacial engineering or production of nanocrystalline materials.

Research Organization:
Univ. of California, Irvine, CA (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE); National Science Foundation (NSF)
Grant/Contract Number:
NE0000711; DMR 1611457
OSTI ID:
1469740
Alternate ID(s):
OSTI ID: 1499998
Journal Information:
Scientific Reports, Vol. 8; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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Cited By (2)


Figures / Tables (4)