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

Research output: Contribution to journal › Article › Research › peer-review

12 Citations (Scopus)

Abstract

The effect of irradiation temperature on the crystallographic stability of the ternary carbides Ti₃SiC₂ and Ti₃ AlC₂ 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
Pages (from-to)	98-102
Number of pages	5
Journal	Scripta Materialia
Volume	165
DOIs	https://doi.org/10.1016/j.scriptamat.2019.02.022
Publication status	Published - May 2019
Externally published	Yes

Keywords

Annealing
Layered structures
Point defects
Proton irradiation
X-ray diffraction (XRD)

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10.1016/j.scriptamat.2019.02.022

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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 Ti3 AlC2 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. ",

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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 - 2019/5

Y1 - 2019/5

N2 - The effect of irradiation temperature on the crystallographic stability of the ternary carbides Ti3SiC2 and Ti3 AlC2 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 Ti3 AlC2 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 - Annealing

KW - Layered structures

KW - Point defects

KW - Proton irradiation

KW - X-ray diffraction (XRD)

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U2 - 10.1016/j.scriptamat.2019.02.022

DO - 10.1016/j.scriptamat.2019.02.022

M3 - Article

AN - SCOPUS:85061692256

SN - 1359-6462

VL - 165

SP - 98

EP - 102

JO - Scripta Materialia

JF - Scripta Materialia

ER -

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

Abstract

Keywords

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