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Title: Microstructural evolution of 3C-SiC exposed to simultaneous neutron irradiation and helium implantation

Journal Article · · Journal of Nuclear Materials

The synergism of transmutant helium and irradiation defects is critically important to understand the performance of SiC when in service in nuclear environments. In this study, we exposed 3C-SiC in contact with a 2 μm Ni foil to neutron irradiation at 500 °C to 29 dpa in the high flux isotope reactor to simulate the simultaneous introduction of helium and irradiation defects into SiC. The combination of TEM observations and thermal desorption measurements helps to elucidate the impact of helium on the microstructural evolution in 3C-SiC. Thermal helium desorption spectra from ion-implanted and neutron-irradiated SiC showed a completely different desorption behavior in terms of the peak position and helium desorption flux. The identification of possible helium trapping sites was attempted by applying the first order dissociation model to the measured thermal helium desorption spectra. TEM observations of the neutron-irradiated samples showed that the presence of helium facilitated the stabilization of the defect clusters and promoted the formation of visible helium bubbles in SiC subject to simultaneous neutron irradiation and in-situ He implantation. Following the subsequent heat treatment during the thermal desorption measurements, large faceted helium bubbles were found along grain boundaries in the neutron-irradiated SiC with in-situ He implantation, while the helium bubbles in the grain interior were relatively smaller than those found in the neutron-irradiated sample without in-situ He implantation due to the reduced mobility of He-defect clusters. In conclusion, the He contents contained in the neutron-irradiated samples were quantified based on the experimental data from TEM and thermal desorption measurements.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Grant/Contract Number:
AC05-00OR22725; AC0500OR22725; LDRD-7704; NFE-13-04478
OSTI ID:
1465044
Alternate ID(s):
OSTI ID: 1691920
Journal Information:
Journal of Nuclear Materials, Vol. 509, Issue C; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

References (40)

Handbook of SiC properties for fuel performance modeling journal September 2007
Properties of Silicon Carbide for Nuclear Fuel Particle Coatings journal September 1977
Motivation for utilizing new high-performance advanced materials in nuclear energy systems journal December 2016
Critical issues and current status of SiC/SiC composites for fusion journal December 2000
Status of silicon carbide composites for fusion journal October 1996
The stability of vacancy clusters and their effect on helium behaviors in 3C-SiC journal May 2018
The influences of irradiation temperature and helium production on the dimensional stability of silicon carbide journal December 2002
Theoretical study of helium insertion and diffusion in 3C-SiC journal January 2006
Interaction between helium and intrinsic point defects in 3C-SiC single crystal journal June 2017
Helium implantation defects in SiC studied by thermal helium desorption spectrometry journal January 2002
Determining the parameters of helium accumulation centers in irradiated silicon carbide from thermodesorption spectra journal February 2013
Helium implantation into 4H-SiC: Helium implantation into 4H-SiC journal June 2009
NRA and ERDA investigation of helium retention in SiC as a function of irradiation and annealing journal June 2004
Indentation Properties of Silicon Carbide after Neutron Irradiation and Helium Implantation journal September 2011
Synergistic Effects of Heavy Ion and Helium Irradiation on Microstructural and Dimensional Change in β-SiC journal January 2005
Synergistic effects of implanted helium and hydrogen and the effect of irradiation temperature on the microstructure of SiC/SiC composites journal December 2004
Effect of helium on radiation damage in a SiC/C composite journal June 2000
The transport and fate of helium in nanostructured ferritic alloys at fusion relevant He/dpa ratios and dpa rates journal August 2007
Helium Release and Physical Property Change of Neutron-Irradiated α-SiC Containing B 4 C of Different 10 B Concentrations journal July 2003
Release and Diffusion Rate of Helium in Neutron-Irradiated SiC journal July 2004
Injecting Irradiation Samples with a Uniform Concentration of Helium Using Curium-244 journal September 1978
Helium deposition profiles from self-shielded alpha sources journal January 1982
Method for analyzing passive silicon carbide thermometry with a continuous dilatometer to determine irradiation temperature
  • Campbell, Anne A.; Porter, Wallace D.; Katoh, Yutai
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 370 https://doi.org/10.1016/j.nimb.2016.01.005
journal March 2016
Displacement energy surface in 3C and 6H SiC journal April 2000
Impact of neutron irradiation on thermal helium desorption from iron journal June 2017
Positron annihilation spectroscopy investigation of vacancy defects in neutron-irradiated 3 C -SiC journal March 2017
Displacement damage in silicon carbide irradiated in fission reactors journal May 2004
Neutron-irradiation creep of silicon carbide materials beyond the initial transient journal September 2016
Ab initio study of the migration of intrinsic defects in 3 C SiC journal November 2003
Ab initio and empirical-potential studies of defect properties in 3 C SiC journal December 2001
Microstructural development in cubic silicon carbide during irradiation at elevated temperatures journal June 2006
Mechanical property degradation of high crystalline SiC fiber–reinforced SiC matrix composite neutron irradiated to ∼100 displacements per atom journal April 2018
Quantifying helium distribution in dual-ion beam irradiated SiCf/SiC composites by electron energy loss spectroscopy journal May 2012
Quantifying He-point defect interactions in Fe through coordinated experimental and modeling studies of He-ion implanted single-crystal Fe journal November 2013
Diffusion of helium in SiC and implications for retention of cosmogenic He journal November 2016
Post-implantation thermal desorption of helium from poly- and single-crystalline iron journal April 2009
Atomic-scale simulation of 50 keV Si displacement cascades in β-SiC journal December 2000
Diffusion and retention of helium in graphite and silicon carbide journal September 1992
Screened empirical bond-order potentials for Si-C journal May 2013
Helium sequestration at nanoparticle-matrix interfaces in helium + heavy ion irradiated nanostructured ferritic alloys journal January 2017

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