Influence of proton-irradiation temperature on the damage accumulation in Ti3SiC2 and Ti3AlC2

Joseph Ward; David Bowden; David Stewart; Michel W Barsoum; Philipp Frankel; Michael Preuss

doi:10.1016/j.scriptamat.2019.02.022

Influence of proton-irradiation temperature on the damage accumulation in Ti₃SiC₂ and Ti₃AlC₂

Joseph Ward, David Bowden, David Stewart, Michel W Barsoum, Philipp Frankel, Michael Preuss

Materials Engineering

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Abstract

The effect of irradiation temperature on the crystallographic stability of the ternary carbides Ti₃SiC₂ and Ti₃AlC₂ was investigated in the 350 to 600 °C temperature range, using 2 MeV protons to a fluence of 2.25 × 10¹⁸ protons cm⁻². Both materials shrink along the basal planes and expand normal to them. Defect recovery decreases the magnitude of these anisotropic lattice changes with increasing irradiation temperature. However, reduced recovery in Ti₃AlC₂ causes irradiated surface exfoliation at low temperatures and elevated damage rates. The extent of lattice change suggests that in-reactor use of these compositions will likely be limited to high-temperature applications.

Original language	English
Journal	Scripta Materialia
Early online date	21 Feb 2019
DOIs	https://doi.org/10.1016/j.scriptamat.2019.02.022
Publication status	Published - 2019

Keywords

Proton Irradiation
Annealing
X-ray Diffraction (XRD)
Layered Structures
Point defects

Research Beacons, Institutes and Platforms

Dalton Nuclear Institute

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10.1016/j.scriptamat.2019.02.022

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Cite this

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title = "Influence of proton-irradiation temperature on the damage accumulation in Ti3SiC2 and Ti3AlC2",

abstract = "The effect of irradiation temperature on the crystallographic stability of the ternary carbides Ti3SiC2 and Ti3AlC2 was investigated in the 350 to 600 °C temperature range, using 2 MeV protons to a fluence of 2.25 × 1018 protons cm−2. Both materials shrink along the basal planes and expand normal to them. Defect recovery decreases the magnitude of these anisotropic lattice changes with increasing irradiation temperature. However, reduced recovery in Ti3AlC2 causes irradiated surface exfoliation at low temperatures and elevated damage rates. The extent of lattice change suggests that in-reactor use of these compositions will likely be limited to high-temperature applications.",

keywords = "Proton Irradiation, Annealing, X-ray Diffraction (XRD), Layered Structures, Point defects",

author = "Joseph Ward and David Bowden and David Stewart and Barsoum, {Michel W} and Philipp Frankel and Michael Preuss",

year = "2019",

doi = "10.1016/j.scriptamat.2019.02.022",

language = "English",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

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TY - JOUR

T1 - Influence of proton-irradiation temperature on the damage accumulation in Ti3SiC2 and Ti3AlC2

AU - Ward, Joseph

AU - Bowden, David

AU - Stewart, David

AU - Barsoum, Michel W

AU - Frankel, Philipp

AU - Preuss, Michael

PY - 2019

Y1 - 2019

N2 - The effect of irradiation temperature on the crystallographic stability of the ternary carbides Ti3SiC2 and Ti3AlC2 was investigated in the 350 to 600 °C temperature range, using 2 MeV protons to a fluence of 2.25 × 1018 protons cm−2. Both materials shrink along the basal planes and expand normal to them. Defect recovery decreases the magnitude of these anisotropic lattice changes with increasing irradiation temperature. However, reduced recovery in Ti3AlC2 causes irradiated surface exfoliation at low temperatures and elevated damage rates. The extent of lattice change suggests that in-reactor use of these compositions will likely be limited to high-temperature applications.

AB - The effect of irradiation temperature on the crystallographic stability of the ternary carbides Ti3SiC2 and Ti3AlC2 was investigated in the 350 to 600 °C temperature range, using 2 MeV protons to a fluence of 2.25 × 1018 protons cm−2. Both materials shrink along the basal planes and expand normal to them. Defect recovery decreases the magnitude of these anisotropic lattice changes with increasing irradiation temperature. However, reduced recovery in Ti3AlC2 causes irradiated surface exfoliation at low temperatures and elevated damage rates. The extent of lattice change suggests that in-reactor use of these compositions will likely be limited to high-temperature applications.

KW - Proton Irradiation

KW - Annealing

KW - X-ray Diffraction (XRD)

KW - Layered Structures

KW - Point defects

U2 - 10.1016/j.scriptamat.2019.02.022

DO - 10.1016/j.scriptamat.2019.02.022

M3 - Article

SN - 1359-6462

JO - Scripta Materialia

JF - Scripta Materialia

ER -