View in EDS

Improving density and properties of spark plasma sintered LaB6 bulk by Ni addition.

Saved in:
Bibliographic Details
Title: Improving density and properties of spark plasma sintered LaB6 bulk by Ni addition.
Authors: Li, Wenhao1 (AUTHOR), Ma, Zhigao1 (AUTHOR), Pan, Liping1 (AUTHOR), Xu, Jianfei1 (AUTHOR), Han, Cuiliu1,2 (AUTHOR) hancl@sxjg-sps.com, Luo, Shifeng1 (AUTHOR), Zhang, Jiuxing1 (AUTHOR), Zhang, Jingwen3 (AUTHOR), Wang, Yan1,4 (AUTHOR) wyan@hfut.edu.cn
Source: Ceramics International. Apr2026:Part A, Vol. 52 Issue 9, p11119-11125. 7p.
Subjects: Sintering, Thermionic emission, Mechanical behavior of materials, Fracture toughness, Nickel alloys, Compacting, Microstructure, Borides
Abstract: The effect of Ni addition on the spark plasma sintering (SPS) densification and properties of LaB 6 is investigated in this study. The results show that the Ni addition not only facilitates the SPS densification of LaB 6 but also enhances its mechanical and thermionic emission properties. Under the conditions of 1800 °C sintering temperature, 50 MPa applied pressure, and 5 min holding time, the LaB 6 -2wt%Ni sample achieves a relative density of 97.5 %, while the pure LaB 6 bulk only reaches 83.4 %. Microstructural analysis reveals that the LaB 6 -2wt%Ni sample has a two-phase microstructure, with the NiB secondary phase mainly distributed along the grain boundaries of the LaB 6 matrix, and the average grain size of LaB 6 grains is 10.11 ± 6.30 μm. The effects of crack deflection and bridge induced by Ni addition enable the LaB 6 -2wt%Ni sample to exhibit an indentation fracture toughness of 1.14 ± 0.04 MPa m1/2, nearly twice that of 0.59 ± 0.05 MPa m1/2 for the SPSed LaB 6 bulk with the same density. At the operating temperature of 1600 °C, the LaB 6 -2wt%Ni sample exhibits a slightly higher thermionic emission current density and lower effective work function compared to the dense LaB 6 bulk. This study provides a novel strategy for the fabrication of dense LaB 6 , and the LaB 6 -Ni composite shows great potential as a thermionic cathode material. [ABSTRACT FROM AUTHOR]
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
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 192510385
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Improving density and properties of spark plasma sintered LaB6 bulk by Ni addition.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Li%2C+Wenhao%22">Li, Wenhao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ma%2C+Zhigao%22">Ma, Zhigao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pan%2C+Liping%22">Pan, Liping</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Jianfei%22">Xu, Jianfei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Han%2C+Cuiliu%22">Han, Cuiliu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> hancl@sxjg-sps.com</i><br /><searchLink fieldCode="AR" term="%22Luo%2C+Shifeng%22">Luo, Shifeng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Jiuxing%22">Zhang, Jiuxing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Jingwen%22">Zhang, Jingwen</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Yan%22">Wang, Yan</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<i> wyan@hfut.edu.cn</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. Apr2026:Part A, Vol. 52 Issue 9, p11119-11125. 7p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Sintering%22">Sintering</searchLink><br /><searchLink fieldCode="DE" term="%22Thermionic+emission%22">Thermionic emission</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Fracture+toughness%22">Fracture toughness</searchLink><br /><searchLink fieldCode="DE" term="%22Nickel+alloys%22">Nickel alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Compacting%22">Compacting</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Borides%22">Borides</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The effect of Ni addition on the spark plasma sintering (SPS) densification and properties of LaB 6 is investigated in this study. The results show that the Ni addition not only facilitates the SPS densification of LaB 6 but also enhances its mechanical and thermionic emission properties. Under the conditions of 1800 °C sintering temperature, 50 MPa applied pressure, and 5 min holding time, the LaB 6 -2wt%Ni sample achieves a relative density of 97.5 %, while the pure LaB 6 bulk only reaches 83.4 %. Microstructural analysis reveals that the LaB 6 -2wt%Ni sample has a two-phase microstructure, with the NiB secondary phase mainly distributed along the grain boundaries of the LaB 6 matrix, and the average grain size of LaB 6 grains is 10.11 ± 6.30 μm. The effects of crack deflection and bridge induced by Ni addition enable the LaB 6 -2wt%Ni sample to exhibit an indentation fracture toughness of 1.14 ± 0.04 MPa m1/2, nearly twice that of 0.59 ± 0.05 MPa m1/2 for the SPSed LaB 6 bulk with the same density. At the operating temperature of 1600 °C, the LaB 6 -2wt%Ni sample exhibits a slightly higher thermionic emission current density and lower effective work function compared to the dense LaB 6 bulk. This study provides a novel strategy for the fabrication of dense LaB 6 , and the LaB 6 -Ni composite shows great potential as a thermionic cathode material. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  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.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=192510385
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.ceramint.2026.01.276
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 7
        StartPage: 11119
    Subjects:
      – SubjectFull: Sintering
        Type: general
      – SubjectFull: Thermionic emission
        Type: general
      – SubjectFull: Mechanical behavior of materials
        Type: general
      – SubjectFull: Fracture toughness
        Type: general
      – SubjectFull: Nickel alloys
        Type: general
      – SubjectFull: Compacting
        Type: general
      – SubjectFull: Microstructure
        Type: general
      – SubjectFull: Borides
        Type: general
    Titles:
      – TitleFull: Improving density and properties of spark plasma sintered LaB6 bulk by Ni addition.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Li, Wenhao
      – PersonEntity:
          Name:
            NameFull: Ma, Zhigao
      – PersonEntity:
          Name:
            NameFull: Pan, Liping
      – PersonEntity:
          Name:
            NameFull: Xu, Jianfei
      – PersonEntity:
          Name:
            NameFull: Han, Cuiliu
      – PersonEntity:
          Name:
            NameFull: Luo, Shifeng
      – PersonEntity:
          Name:
            NameFull: Zhang, Jiuxing
      – PersonEntity:
          Name:
            NameFull: Zhang, Jingwen
      – PersonEntity:
          Name:
            NameFull: Wang, Yan
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 04
              Text: Apr2026:Part A
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 02728842
          Numbering:
            – Type: volume
              Value: 52
            – Type: issue
              Value: 9
          Titles:
            – TitleFull: Ceramics International
              Type: main
ResultId 1