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Title: Influence of electronic vs nuclear energy loss in radiation damage of Ti3SiC2

Journal Article · · Acta Materialia
ORCiD logo [1];  [2];  [1]; ORCiD logo [3]; ORCiD logo [4]
  1. Univ. of Tennessee, Knoxville, TN (United States). Department of Materials Science & Engineering
  2. Univ. of Tennessee, Knoxville, TN (United States). Department of Materials Science & Engineering ; Univ. of Liverpool (United Kingdom). Department of Mechanical, Materials & Areospace Engineering
  3. Univ. of Tennessee, Knoxville, TN (United States). Department of Materials Science & Engineering ; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  4. Univ. of Tennessee, Knoxville, TN (United States). Department of Materials Science & Engineering ; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division

We report the thermal conductivity and stability of MAX phases has led to irradiation studies of these materials for their possible application in the hostile environments of high temperature and radiation. Numerous neutron and ion irradiation studies have been conducted that demonstrate that radiation induced modifications consists of lattice strain and increased formation of TiC. Ion beams have been used to simulate damage created by neutrons; however, what is not clear is the effect of varying electronic to nuclear energy loss on the damage evolution within this material. In the present work, changes in c/a within Ti3SiC2 are monitored as a function of energy deposition at constant damage dose following high fluence 9 MeV Ti ion irradiations at room temperature. The results reveal that there is an apparent threshold in the electronic energy loss, above which the c/a ratio and TiC concentration starts to increase with increasing electronic energy loss. Interestingly, this change is independent of the damage dose in displacements per atom. In conclusion, this suggests that inelastic energy dissipation is of paramount importance when selecting ions for simulating damage by energetic neutrons.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1479689
Journal Information:
Acta Materialia, Vol. 161, Issue C; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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Cited By (1)

High strengthening effects and excellent wear resistance of Ti 3 Al(Si)C 2 solid solutions journal May 2019

Figures / Tables (4)