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Morphological features of synthetic diamond microcrystals subjected to oxidative etching.

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Title: Morphological features of synthetic diamond microcrystals subjected to oxidative etching.
Authors: Bokhonov, Boris B.1 (AUTHOR) bokhonov@solid.nsc.ru, Gerasimov, Konstantin B.1 (AUTHOR), Mikhailenko, Mikhail A.1 (AUTHOR)
Source: Diamond & Related Materials. Jun2023, Vol. 136, pN.PAG-N.PAG. 1p.
Subjects: Artificial diamonds, Crystal etching, Diamond crystals, Etching, Diamonds, Crystal morphology, High temperatures, Atmospheric temperature
Abstract: In the present work, the morphological changes of synthetic diamond microcrystals of cuboctahedral shape upon oxidative etching in oxygen or synthetic air at elevated temperatures were studied. It was found that, at the early stages, selective etching of the {111} facets occurs, resulting in the formation of triangular etch pits. Crystals etched at 600–700 °C up to high transformation degrees are of skeletal type: in these crystals, the {111} facets are severely etched. At temperatures above 700 °C, the {100} facets start demonstrating etch pits. These pits are of square shape and have a stepped morphology. Oxidative etching at 900 °C leads to the formation of diamond crystals of antiskeletal type at high transformation degrees (30–50 %). It is suggested that the observed change in the morphology of the diamond crystals with temperature of the oxidative etching is related to the change in the ratio of the etching rates of the {111} and {100} facets. [Display omitted] • Below 700°С, oxidative etching of {111} facets of diamond occurs. • Oxidative etching below 700°С results in the formation of skeletal diamond crystals. • Above 700°С, both {111} and {100} facets experience etching. • Oxidative etching at 900°С results in formation of antiskeletal diamond crystals. [ABSTRACT FROM AUTHOR]
Copyright of Diamond & Related Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 164246660
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Morphological features of synthetic diamond microcrystals subjected to oxidative etching.
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  Data: <searchLink fieldCode="DE" term="%22Artificial+diamonds%22">Artificial diamonds</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+etching%22">Crystal etching</searchLink><br /><searchLink fieldCode="DE" term="%22Diamond+crystals%22">Diamond crystals</searchLink><br /><searchLink fieldCode="DE" term="%22Etching%22">Etching</searchLink><br /><searchLink fieldCode="DE" term="%22Diamonds%22">Diamonds</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+morphology%22">Crystal morphology</searchLink><br /><searchLink fieldCode="DE" term="%22High+temperatures%22">High temperatures</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+temperature%22">Atmospheric temperature</searchLink>
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  Data: In the present work, the morphological changes of synthetic diamond microcrystals of cuboctahedral shape upon oxidative etching in oxygen or synthetic air at elevated temperatures were studied. It was found that, at the early stages, selective etching of the {111} facets occurs, resulting in the formation of triangular etch pits. Crystals etched at 600–700 °C up to high transformation degrees are of skeletal type: in these crystals, the {111} facets are severely etched. At temperatures above 700 °C, the {100} facets start demonstrating etch pits. These pits are of square shape and have a stepped morphology. Oxidative etching at 900 °C leads to the formation of diamond crystals of antiskeletal type at high transformation degrees (30–50 %). It is suggested that the observed change in the morphology of the diamond crystals with temperature of the oxidative etching is related to the change in the ratio of the etching rates of the {111} and {100} facets. [Display omitted] • Below 700°С, oxidative etching of {111} facets of diamond occurs. • Oxidative etching below 700°С results in the formation of skeletal diamond crystals. • Above 700°С, both {111} and {100} facets experience etching. • Oxidative etching at 900°С results in formation of antiskeletal diamond crystals. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Diamond & Related Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.diamond.2023.109934
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Artificial diamonds
        Type: general
      – SubjectFull: Crystal etching
        Type: general
      – SubjectFull: Diamond crystals
        Type: general
      – SubjectFull: Etching
        Type: general
      – SubjectFull: Diamonds
        Type: general
      – SubjectFull: Crystal morphology
        Type: general
      – SubjectFull: High temperatures
        Type: general
      – SubjectFull: Atmospheric temperature
        Type: general
    Titles:
      – TitleFull: Morphological features of synthetic diamond microcrystals subjected to oxidative etching.
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            NameFull: Bokhonov, Boris B.
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            NameFull: Gerasimov, Konstantin B.
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            NameFull: Mikhailenko, Mikhail A.
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            – D: 01
              M: 06
              Text: Jun2023
              Type: published
              Y: 2023
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              Value: 136
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