Abstract

The patterns of depth microhardness, nanohardness and modulus of elasticity of alumina ceramics were investigated by microindentation and nanoindentation methods after treatment with a beam of ions of the composition: carbon ions (C+, Cn+) and protons (H+) in a ratio of 85%/15%. The accelerating voltage was 180 keV. The experiments were performed at pulse energy density (W) of 0.3, 1 and 1.5 J/cm2. It is shown that ion treatment increases the strength of the surface layers of ceramics at depth that exceeds the penetration depth of accelerated ions by an order of magnitude or more. That is, there is a long-range effect characteristic of the ion treatment of metals and alloys. The analysis of the processes of energy release and structural changes in the surface layers shows that melting and recrystallization of the thin surface layer of ceramics observed in ion treatment are not the determining factors that change the strength properties of ceramics under these layers. It is shown that hardening of these layers occurs by the shock-wave mechanism initiated by local overheating of the surface layers of ceramics by intense pulsed ion beam.

Original languageEnglish
Pages (from-to)89-94
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume464
DOIs
Publication statusPublished - 1 Feb 2020

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Alumina
aluminum oxides
ceramics
surface layers
Ions
ions
microhardness
Nanohardness
Nanoindentation
nanoindentation
Shock waves
hardening
Microhardness
Ion beams
Hardening
shock waves
modulus of elasticity
Protons
Melting
penetration

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

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title = "Ion modification of alumina ceramics",
abstract = "The patterns of depth microhardness, nanohardness and modulus of elasticity of alumina ceramics were investigated by microindentation and nanoindentation methods after treatment with a beam of ions of the composition: carbon ions (C+, Cn+) and protons (H+) in a ratio of 85{\%}/15{\%}. The accelerating voltage was 180 keV. The experiments were performed at pulse energy density (W) of 0.3, 1 and 1.5 J/cm2. It is shown that ion treatment increases the strength of the surface layers of ceramics at depth that exceeds the penetration depth of accelerated ions by an order of magnitude or more. That is, there is a long-range effect characteristic of the ion treatment of metals and alloys. The analysis of the processes of energy release and structural changes in the surface layers shows that melting and recrystallization of the thin surface layer of ceramics observed in ion treatment are not the determining factors that change the strength properties of ceramics under these layers. It is shown that hardening of these layers occurs by the shock-wave mechanism initiated by local overheating of the surface layers of ceramics by intense pulsed ion beam.",
author = "S. Ghyngazov and V. Kostenko and S. Shevelev and E. Lysenko and A. Surzhikov",
year = "2020",
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TY - JOUR

T1 - Ion modification of alumina ceramics

AU - Ghyngazov, S.

AU - Kostenko, V.

AU - Shevelev, S.

AU - Lysenko, E.

AU - Surzhikov, A.

PY - 2020/2/1

Y1 - 2020/2/1

N2 - The patterns of depth microhardness, nanohardness and modulus of elasticity of alumina ceramics were investigated by microindentation and nanoindentation methods after treatment with a beam of ions of the composition: carbon ions (C+, Cn+) and protons (H+) in a ratio of 85%/15%. The accelerating voltage was 180 keV. The experiments were performed at pulse energy density (W) of 0.3, 1 and 1.5 J/cm2. It is shown that ion treatment increases the strength of the surface layers of ceramics at depth that exceeds the penetration depth of accelerated ions by an order of magnitude or more. That is, there is a long-range effect characteristic of the ion treatment of metals and alloys. The analysis of the processes of energy release and structural changes in the surface layers shows that melting and recrystallization of the thin surface layer of ceramics observed in ion treatment are not the determining factors that change the strength properties of ceramics under these layers. It is shown that hardening of these layers occurs by the shock-wave mechanism initiated by local overheating of the surface layers of ceramics by intense pulsed ion beam.

AB - The patterns of depth microhardness, nanohardness and modulus of elasticity of alumina ceramics were investigated by microindentation and nanoindentation methods after treatment with a beam of ions of the composition: carbon ions (C+, Cn+) and protons (H+) in a ratio of 85%/15%. The accelerating voltage was 180 keV. The experiments were performed at pulse energy density (W) of 0.3, 1 and 1.5 J/cm2. It is shown that ion treatment increases the strength of the surface layers of ceramics at depth that exceeds the penetration depth of accelerated ions by an order of magnitude or more. That is, there is a long-range effect characteristic of the ion treatment of metals and alloys. The analysis of the processes of energy release and structural changes in the surface layers shows that melting and recrystallization of the thin surface layer of ceramics observed in ion treatment are not the determining factors that change the strength properties of ceramics under these layers. It is shown that hardening of these layers occurs by the shock-wave mechanism initiated by local overheating of the surface layers of ceramics by intense pulsed ion beam.

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U2 - 10.1016/j.nimb.2019.12.013

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

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