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Structure and mechanical properties of zirconium diboride‐based ceramics produced by the spark plasma sintering.

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Title: Structure and mechanical properties of zirconium diboride‐based ceramics produced by the spark plasma sintering.
Authors: Melakh, Liudmyla1 (AUTHOR) liudmyla.melakh@taltech.ee, Vedel, Dmytro2 (AUTHOR), Juhani, Kristjan1 (AUTHOR), Tarraste, Marek1 (AUTHOR), Traksmaa, Rainer1 (AUTHOR), Viljus, Mart1 (AUTHOR)
Source: International Journal of Applied Ceramic Technology. Feb2026, Vol. 23 Issue 1, p1-7. 7p.
Subjects: Zirconium boride, Sintering, Mechanical behavior of materials, Additives, Hardness, Fracture toughness, Microstructure
Abstract: This article investigates the impact of second‐phase additives on the structure and mechanical properties of zirconium diboride (ZrB2)‐based ceramic materials. The materials obtained were characterized by X‐ray diffraction, scanning electron microscopy, and Vickers hardness (HV) analysis. As a result, in the temperature range of 1800–2000°C, dense ceramic materials with a fine‐grained structure and uniform distribution of secondary phases were obtained. Additives such as molybdenum disilicide (MoSi2), silicon carbide (SiC), molybdenum carbide (Mo2C), and tungsten carbide (WC) lowered the sintering temperature compared to the sintering of pure ZrB2. HV measured at loads from 1 to 20 kg showed a weak dependence of hardness on the load. Maximum hardness values were achieved for the three‐component ceramics ZB2 + 15 vol.% SiC + 5 vol.% Mo2C and ZB2 + 15 vol.% SiC + 5 vol.% WC (HV20 = 18.68 GPa and 19.33 GPa, respectively) due to increased density of the materials and small grain sizes. The addition of 15 vol.% MoSi2 leads to an increase in the fracture toughness (5.04 MPa*m1/2) and grain boundary strength (0.58 GPa). This points to the formation of grain boundary states with increased strength (σf = 0.48 GPa). [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Applied Ceramic Technology is the property of Wiley-Blackwell 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: 191803600
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Structure and mechanical properties of zirconium diboride‐based ceramics produced by the spark plasma sintering.
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  Data: <searchLink fieldCode="AR" term="%22Melakh%2C+Liudmyla%22">Melakh, Liudmyla</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> liudmyla.melakh@taltech.ee</i><br /><searchLink fieldCode="AR" term="%22Vedel%2C+Dmytro%22">Vedel, Dmytro</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Juhani%2C+Kristjan%22">Juhani, Kristjan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tarraste%2C+Marek%22">Tarraste, Marek</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Traksmaa%2C+Rainer%22">Traksmaa, Rainer</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Viljus%2C+Mart%22">Viljus, Mart</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Applied+Ceramic+Technology%22">International Journal of Applied Ceramic Technology</searchLink>. Feb2026, Vol. 23 Issue 1, p1-7. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Zirconium+boride%22">Zirconium boride</searchLink><br /><searchLink fieldCode="DE" term="%22Sintering%22">Sintering</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Additives%22">Additives</searchLink><br /><searchLink fieldCode="DE" term="%22Hardness%22">Hardness</searchLink><br /><searchLink fieldCode="DE" term="%22Fracture+toughness%22">Fracture toughness</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This article investigates the impact of second‐phase additives on the structure and mechanical properties of zirconium diboride (ZrB2)‐based ceramic materials. The materials obtained were characterized by X‐ray diffraction, scanning electron microscopy, and Vickers hardness (HV) analysis. As a result, in the temperature range of 1800–2000°C, dense ceramic materials with a fine‐grained structure and uniform distribution of secondary phases were obtained. Additives such as molybdenum disilicide (MoSi2), silicon carbide (SiC), molybdenum carbide (Mo2C), and tungsten carbide (WC) lowered the sintering temperature compared to the sintering of pure ZrB2. HV measured at loads from 1 to 20 kg showed a weak dependence of hardness on the load. Maximum hardness values were achieved for the three‐component ceramics ZB2 + 15 vol.% SiC + 5 vol.% Mo2C and ZB2 + 15 vol.% SiC + 5 vol.% WC (HV20 = 18.68 GPa and 19.33 GPa, respectively) due to increased density of the materials and small grain sizes. The addition of 15 vol.% MoSi2 leads to an increase in the fracture toughness (5.04 MPa*m1/2) and grain boundary strength (0.58 GPa). This points to the formation of grain boundary states with increased strength (σf = 0.48 GPa). [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Applied Ceramic Technology is the property of Wiley-Blackwell 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: 10.1111/ijac.70131
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      – Code: eng
        Text: English
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        PageCount: 7
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      – SubjectFull: Zirconium boride
        Type: general
      – SubjectFull: Sintering
        Type: general
      – SubjectFull: Mechanical behavior of materials
        Type: general
      – SubjectFull: Additives
        Type: general
      – SubjectFull: Hardness
        Type: general
      – SubjectFull: Fracture toughness
        Type: general
      – SubjectFull: Microstructure
        Type: general
    Titles:
      – TitleFull: Structure and mechanical properties of zirconium diboride‐based ceramics produced by the spark plasma sintering.
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            NameFull: Melakh, Liudmyla
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            NameFull: Vedel, Dmytro
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            NameFull: Juhani, Kristjan
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            NameFull: Tarraste, Marek
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            – D: 01
              M: 02
              Text: Feb2026
              Type: published
              Y: 2026
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