skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Nano-scale microstructure damage by neutron irradiations in a novel Boron-11 enriched TiB2 ultra-high temperature ceramic

Journal Article · · Acta Materialia

Ultra-high temperature transition-metal ceramics are potential candidates for fusion reactor structural and plasma-facing components. We reveal the irradiation damage microstructural phenomena in Boron-11 enriched titanium diboride (TiB2) using mixed-spectrum neutron irradiations, combined with state-of-art characterization using transmission electron microscopy (TEM) and high resolution TEM. Irradiations were performed using High Flux Isotope Reactor at ~220 and 620 °C up to 2.4 x 1025 n.m-2 (E > 0.1 MeV). The calculated dose including contribution from residual Boron-10 (10B) transmutation recoils, was ~4.2 displacements per atom. TiB2 is susceptible to irradiation damage in terms of dislocation loop formation, cavities and anisotropic swelling induced micro-cracking. At both 220 and 620 °C, TEM revealed dislocation loops on basal and prism planes, with nearly two orders of magnitude higher number density of prism-plane loops. HRTEM, electron diffraction and relrod imaging revealed additional defects on {10$$ \overline{1}\ $$0} planes, identified as faulted prism-plane dislocation loops. High defect cluster density on prism planes will induce a-lattice parameter swelling of TiB2, as reported in literature. This anisotropic lattice parameter swelling induced grain boundary micro-cracking, the extent of which decreased with increasing irradiation temperature. The dominance of irradiation defect clusters on prism planes is different than typical hexagonal ceramics where dislocation loops predominantly form on basal planes, causing c-lattice parameter swelling. Helium generation and temperature rise from the transmutation of residual 10B resulted in matrix and grain boundary cavities for the irradiation at 620 °C. In conclusion, the study additionally signifies isotopic enrichment as a viable approach to produce transition-metal diborides for potential nuclear structural applications.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725; NFE-13-04416
OSTI ID:
1484130
Alternate ID(s):
OSTI ID: 1636989
Journal Information:
Acta Materialia, Vol. 165, Issue C; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

References (69)

Fissile core and Tritium-Breeding Blanket: structural materials and their requirements journal April 2008
Materials challenges in nuclear energy journal February 2013
Material properties of titanium diboride journal September 2000
Comparative wear in titanium diboride coatings on steel using high energy density processes journal May 2000
Titanium diboride coatings and their interaction with the substrates journal October 1978
Deuterium and helium ion irradiation effects on TiB2 coatings journal November 1979
Fracturing of borides under neutron irradiation journal October 1996
Calculation of the neutron temperature in the WWR-M reactor channel by the maple software package journal April 2009
Handbook of SiC properties for fuel performance modeling journal September 2007
Electron microscopy of irradiated BeO journal April 1964
Swelling and microstructure of A1N irradiated in a fast reactor journal September 1993
Mechanisms of irradiation-induced growth and cracking in beryllia journal January 1964
Defect clustering and self-healing of electron-irradiated boron-rich solids journal May 1995
Helium accumulation in metals during irradiation – where do we stand? journal December 2003
Dramatic reduction of void swelling by helium in ion-irradiated high purity α -iron journal April 2018
Helium induced microstructure damage, nano-scale grain formation and helium retention behaviour of ZrC journal January 2019
An experimental study of helium diffusion and helium induced microstructural evolution in ion implanted polycrystalline titanium nitride journal December 2016
Helium and point defect accumulation: (i) microstructure and mechanical behaviour journal April 2008
Neutron cross sections of the boron isotopes for energies between 10 and 500 keV journal July 1966
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
A comparative study of low energy radiation responses of SiC, TiC and ZrC journal May 2016
Characterisation of radiation-damage microstructures by TEM journal October 1994
Neutron irradiation damage in MgO, Al2O3 and MgAl2O4 ceramics journal July 1982
Defect production in ceramics journal November 1997
Microscopic studies of defect formation under dense electronic excitation in insulators journal May 1988
Radiation-induced amorphization resistance and radiation tolerance in structurally related oxides journal February 2007
Atomistic study of intrinsic defect migration in 3C-SiC journal June 2004
Stability and Mobility of Mono- and Di-Interstitials in α -Fe journal April 2004
Point Defects in Copper journal July 1962
Point-Defect Calculations for an fcc Lattice journal May 1966
Computer simulation of point defect properties in dilute Fe—Cu alloy using a many-body interatomic potential journal March 1997
Microstructural development in cubic silicon carbide during irradiation at elevated temperatures journal June 2006
Etude au microscope electronique des defauts de structure dans l'oxyde de beryllium fritte irradie journal December 1963
Transmission electron microscope studies of neutron irradiated beryllium oxide journal August 1966
Direct observations of damage in neutron irradiated beryllium oxide journal January 1964
Electron microscopy of irradiated BeO journal January 1964
Irradiation creep of 3C–SiC and microstructural understanding of the underlying mechanisms journal May 2014
Dislocation loop evolution under ion irradiation in austenitic stainless steels journal May 2010
Defect aggregates in neutron-irradiated β-Si 3 N 4 journal January 1983
TEM characterization of dislocations in TiB 2 particles after hypervelocity impact journal December 2014
Radiation effects in carbides: TiC and ZrC versus SiC journal May 2014
A hrem study of neutron-irradiation-induced dislocations in aluminium nitride journal August 1990
Damage in the cation sublattice of α-Al 2 O 3 irradiated in an HVEM journal March 1983
The influence of helium doping on the damage microstructure of heavy-ion irradiated α-Al 2 O 3 journal May 1985
Evolution of Helium Platelets and Associated Dislocation Loops in α -SiC journal March 1999
Effect of neutron irradiation on defect evolution in Ti3SiC2 and Ti2AlC journal January 2016
Effect of neutron irradiation on select MAX phases journal February 2015
Effects of neutron irradiation of Ti3SiC2 and Ti3AlC2 in the 121–1085 °C temperature range journal February 2017
Early Damage Mechanisms in Nuclear Grade Graphite under Irradiation journal October 2013
High-resolution electron microscopy of neutron-irradiation-induced dislocations in SiC journal October 1990
A new type of defect on {1120} planes in ß-Si 3 N 4 produced by neutron irradiation journal April 2001
Neutron-irradiation-induced crystalline defects in β-silicon nitride and their thermal stability journal October 2011
A structural model of defects in β-Si 3 N 4 produced by neutron irradiation journal March 2001
Evolution of microstructure in hcp metals during irradiation journal October 1993
Silicon nitride crystal structure and observations of lattice defects journal January 1996
Transmission electron microscope studies of dislocation loops in heavy-ion irradiated H.C.P. cobalt journal February 1977
Microhardness of Single Crystals of BeO and Other Wurtzite Compounds journal January 1963
Structural and electron diffraction data for sapphire (?-al2o3) journal January 1985
Dimensional isotropy of 6H and 3C SiC under neutron irradiation journal April 2016
Macroscopic length, lattice parameter and microstructural changes in neutron-irradiated aluminum nitride due to annealing journal September 1992
Removal of anisotropic growth strains in neutron-irradiated beryllium oxide journal July 1966
High temperature ion irradiation effects in MAX phase ceramics journal February 2016
Grain boundary energy anisotropy: a review journal September 2011
Surface, grain-boundary and interfacial energies in Al2O3 and Al2O3-Sn, Al2O3-Co systems journal November 1985
Defect kinetics and resistance to amorphization in zirconium carbide journal February 2015
Effect of H and He irradiation on cavity formation and blistering in ceramics journal September 2012
Compound Formation in the Systems Lithium-Carbon and Lithium-Boron journal October 1967
Swelling and microcracking of boron carbide subjected to fast neutron irradiations journal October 1990
Practical analysis of Li distribution by EELS: Analysis of Li distribution by EELS journal July 2016

Cited By (1)

Selection, processing, properties and applications of ultra-high temperature ceramic matrix composites, UHTCMCs – a review journal September 2019