Thermal fatigue of ion implanted magnesium oxide crystals

V. N. Gurarie; D. N. Jamieson; A. V. Orlov; J. S. Williams; M. Conway

doi:10.1016/S0168-583X(98)00721-6

Thermal fatigue of ion implanted magnesium oxide crystals

V. N. Gurarie^*, D. N. Jamieson, A. V. Orlov, J. S. Williams, M. Conway

^*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

The present work deals with developing a novel technique suitable for thermal fatigue testing of implanted materials and investigating the cycling fatigue properties of implanted magnesium oxide crystals. Single crystals of MgO were implanted with Si^- 90 keV ions with a dose of 5.0×10¹⁶ cm^-2 and then subjected to thermal cycling in a discharge plasma. The peak cycle temperature and thermal flux were measured using a calorimetric method. The number of thermal cycles prior to an appearance of first cracks and fatigue limit were evaluated for both the implanted and unimplanted regions. The data demonstrate that ion implantation increases the fatigue life and fatigue limit of MgO crystals. The analysis suggests the implantation-induced lattice damage retards the dislocation motion and, thus, reduces the plastic strain during thermal cycling that increases the resistance to the development of fatigue cracks.

Original language	English
Pages (from-to)	773-777
Number of pages	5
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	148
Issue number	1-4
DOIs	https://doi.org/10.1016/S0168-583X(98)00721-6
Publication status	Published - 1999

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title = "Thermal fatigue of ion implanted magnesium oxide crystals",

abstract = "The present work deals with developing a novel technique suitable for thermal fatigue testing of implanted materials and investigating the cycling fatigue properties of implanted magnesium oxide crystals. Single crystals of MgO were implanted with Si- 90 keV ions with a dose of 5.0×1016 cm-2 and then subjected to thermal cycling in a discharge plasma. The peak cycle temperature and thermal flux were measured using a calorimetric method. The number of thermal cycles prior to an appearance of first cracks and fatigue limit were evaluated for both the implanted and unimplanted regions. The data demonstrate that ion implantation increases the fatigue life and fatigue limit of MgO crystals. The analysis suggests the implantation-induced lattice damage retards the dislocation motion and, thus, reduces the plastic strain during thermal cycling that increases the resistance to the development of fatigue cracks.",

keywords = "Ceramics, Fatigue properties modification, Ion implantation",

author = "Gurarie, {V. N.} and Jamieson, {D. N.} and Orlov, {A. V.} and Williams, {J. S.} and M. Conway",

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TY - JOUR

T1 - Thermal fatigue of ion implanted magnesium oxide crystals

AU - Gurarie, V. N.

AU - Jamieson, D. N.

AU - Orlov, A. V.

AU - Williams, J. S.

AU - Conway, M.

PY - 1999

Y1 - 1999

N2 - The present work deals with developing a novel technique suitable for thermal fatigue testing of implanted materials and investigating the cycling fatigue properties of implanted magnesium oxide crystals. Single crystals of MgO were implanted with Si- 90 keV ions with a dose of 5.0×1016 cm-2 and then subjected to thermal cycling in a discharge plasma. The peak cycle temperature and thermal flux were measured using a calorimetric method. The number of thermal cycles prior to an appearance of first cracks and fatigue limit were evaluated for both the implanted and unimplanted regions. The data demonstrate that ion implantation increases the fatigue life and fatigue limit of MgO crystals. The analysis suggests the implantation-induced lattice damage retards the dislocation motion and, thus, reduces the plastic strain during thermal cycling that increases the resistance to the development of fatigue cracks.

AB - The present work deals with developing a novel technique suitable for thermal fatigue testing of implanted materials and investigating the cycling fatigue properties of implanted magnesium oxide crystals. Single crystals of MgO were implanted with Si- 90 keV ions with a dose of 5.0×1016 cm-2 and then subjected to thermal cycling in a discharge plasma. The peak cycle temperature and thermal flux were measured using a calorimetric method. The number of thermal cycles prior to an appearance of first cracks and fatigue limit were evaluated for both the implanted and unimplanted regions. The data demonstrate that ion implantation increases the fatigue life and fatigue limit of MgO crystals. The analysis suggests the implantation-induced lattice damage retards the dislocation motion and, thus, reduces the plastic strain during thermal cycling that increases the resistance to the development of fatigue cracks.

KW - Ceramics

KW - Fatigue properties modification

KW - Ion implantation

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U2 - 10.1016/S0168-583X(98)00721-6

DO - 10.1016/S0168-583X(98)00721-6

M3 - Article

SN - 0168-583X

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SP - 773

EP - 777

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

IS - 1-4

ER -

Thermal fatigue of ion implanted magnesium oxide crystals

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