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A study of the oxidation of ZrB2 powders during high-energy ball-milling in air

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Title: A study of the oxidation of ZrB2 powders during high-energy ball-milling in air
Authors: Ortiz, Angel L. alortiz@unex.es, Zamora, Victor1, Rodríguez-Rojas, Fernando1
Source: Ceramics International. May2012, Vol. 38 Issue 4, p2857-2863. 7p.
Subjects: Zirconium compounds, Oxidation, Metal powders, Mechanical alloying, Metal inclusions, Sintering, Ostwald ripening, Transmission electron microscopy
Abstract: Abstract: Oxide impurities in ZrB2 powders promote coarsening, resulting in lower sinterability. Given its importance for sintering, we studied the oxidation of ZrB2 powders during high-energy ball-milling (the form of milling able to refine ZrB2 powders to the nanoscale) with the aid of various characterization techniques, namely fusion in inert gas, X-ray diffractometry, helium pycnometry, transmission electron microscopy, and Fourier-transform infrared, Raman, and X-ray photoemission spectroscopy. It was found that high-energy ball-milling in air introduces twice as much oxygen into the ZrB2 powders as the more conventional attrition milling. Also, this oxygen does not form solid-solutions with ZrB2, but amorphous oxides (i.e., ZrO2 and B2O3) that locate preferentially on the surface of the ultra-fine agglomerates resulting from cold-welding of the primary nano-particles that form during the ball-milling. [Copyright &y& Elsevier]
Copyright of Ceramics International 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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DbLabel: Engineering Source
An: 73526953
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: <searchLink fieldCode="AR" term="%22Ortiz%2C+Angel+L%2E%22">Ortiz, Angel L.</searchLink><i> alortiz@unex.es</i><br /><searchLink fieldCode="AR" term="%22Zamora%2C+Victor%22">Zamora, Victor</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Rodríguez-Rojas%2C+Fernando%22">Rodríguez-Rojas, Fernando</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. May2012, Vol. 38 Issue 4, p2857-2863. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Zirconium+compounds%22">Zirconium compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation%22">Oxidation</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+powders%22">Metal powders</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+alloying%22">Mechanical alloying</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+inclusions%22">Metal inclusions</searchLink><br /><searchLink fieldCode="DE" term="%22Sintering%22">Sintering</searchLink><br /><searchLink fieldCode="DE" term="%22Ostwald+ripening%22">Ostwald ripening</searchLink><br /><searchLink fieldCode="DE" term="%22Transmission+electron+microscopy%22">Transmission electron microscopy</searchLink>
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  Data: Abstract: Oxide impurities in ZrB2 powders promote coarsening, resulting in lower sinterability. Given its importance for sintering, we studied the oxidation of ZrB2 powders during high-energy ball-milling (the form of milling able to refine ZrB2 powders to the nanoscale) with the aid of various characterization techniques, namely fusion in inert gas, X-ray diffractometry, helium pycnometry, transmission electron microscopy, and Fourier-transform infrared, Raman, and X-ray photoemission spectroscopy. It was found that high-energy ball-milling in air introduces twice as much oxygen into the ZrB2 powders as the more conventional attrition milling. Also, this oxygen does not form solid-solutions with ZrB2, but amorphous oxides (i.e., ZrO2 and B2O3) that locate preferentially on the surface of the ultra-fine agglomerates resulting from cold-welding of the primary nano-particles that form during the ball-milling. [Copyright &y& Elsevier]
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  Data: <i>Copyright of Ceramics International 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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      – Type: doi
        Value: 10.1016/j.ceramint.2011.11.058
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      – Code: eng
        Text: English
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        StartPage: 2857
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        Type: general
      – SubjectFull: Oxidation
        Type: general
      – SubjectFull: Metal powders
        Type: general
      – SubjectFull: Mechanical alloying
        Type: general
      – SubjectFull: Metal inclusions
        Type: general
      – SubjectFull: Sintering
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      – SubjectFull: Ostwald ripening
        Type: general
      – SubjectFull: Transmission electron microscopy
        Type: general
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      – TitleFull: A study of the oxidation of ZrB2 powders during high-energy ball-milling in air
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            NameFull: Ortiz, Angel L.
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            NameFull: Zamora, Victor
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            NameFull: Rodríguez-Rojas, Fernando
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              Text: May2012
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