View in EDS

Machining of Ox-Ox (Al2O3/Al2O3) ceramics matrix composites by ultrafast laser.

Saved in:
Bibliographic Details
Title: Machining of Ox-Ox (Al2O3/Al2O3) ceramics matrix composites by ultrafast laser.
Authors: Radhakrishnan, J.1 (AUTHOR) J.radhakrish@the-mtc.org, Marimuthu, S.1 (AUTHOR)
Source: Ceramics International. Oct2024:Part B, Vol. 50 Issue 20, p39678-39686. 9p.
Subjects: Ceramic materials, Laser machining, Brittle fractures, Laser ablation, Surface roughness
Abstract: High-performance Ox-Ox ceramics material composites (CMC) are a strategic building block in the aerospace industry and high-temperature applications. The ceramics material composites are hard to machine due to high hardness, fracture toughness, and heterogeneous structures. Furthermore, it is prone to brittle fracture during the machining process. In this study, we successfully demonstrate ultrafast laser machining technology to machine Ox-Ox CMCs. A picosecond laser has been used to machine slots to understand the impact of laser process parameters on the material removal mechanism by performing deep machining. Different scan rates and a number of over-scans have been employed to understand the material removal mechanism, which is dominated by laser ablation and aided by melting due to the residual surface temperature. The maximum material removal rate of 21.75 mm3/min has been achieved for the scan rate of 300 mm/s. This can be related to the reduction in the ablation threshold and the critical balance between the material removal mechanism by ablation and melting. It was found that, the surface roughness of the cut surface has decreased due to melting and solidification. The cross-sectional examination reveals two distinct surface structures, which are entirely resolidified and thermally eroded regions. [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: 179434512
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Machining of Ox-Ox (Al2O3/Al2O3) ceramics matrix composites by ultrafast laser.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Radhakrishnan%2C+J%2E%22">Radhakrishnan, J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> J.radhakrish@the-mtc.org</i><br /><searchLink fieldCode="AR" term="%22Marimuthu%2C+S%2E%22">Marimuthu, S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. Oct2024:Part B, Vol. 50 Issue 20, p39678-39686. 9p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Ceramic+materials%22">Ceramic materials</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+machining%22">Laser machining</searchLink><br /><searchLink fieldCode="DE" term="%22Brittle+fractures%22">Brittle fractures</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+ablation%22">Laser ablation</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+roughness%22">Surface roughness</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: High-performance Ox-Ox ceramics material composites (CMC) are a strategic building block in the aerospace industry and high-temperature applications. The ceramics material composites are hard to machine due to high hardness, fracture toughness, and heterogeneous structures. Furthermore, it is prone to brittle fracture during the machining process. In this study, we successfully demonstrate ultrafast laser machining technology to machine Ox-Ox CMCs. A picosecond laser has been used to machine slots to understand the impact of laser process parameters on the material removal mechanism by performing deep machining. Different scan rates and a number of over-scans have been employed to understand the material removal mechanism, which is dominated by laser ablation and aided by melting due to the residual surface temperature. The maximum material removal rate of 21.75 mm3/min has been achieved for the scan rate of 300 mm/s. This can be related to the reduction in the ablation threshold and the critical balance between the material removal mechanism by ablation and melting. It was found that, the surface roughness of the cut surface has decreased due to melting and solidification. The cross-sectional examination reveals two distinct surface structures, which are entirely resolidified and thermally eroded regions. [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=179434512
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.ceramint.2024.07.347
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 9
        StartPage: 39678
    Subjects:
      – SubjectFull: Ceramic materials
        Type: general
      – SubjectFull: Laser machining
        Type: general
      – SubjectFull: Brittle fractures
        Type: general
      – SubjectFull: Laser ablation
        Type: general
      – SubjectFull: Surface roughness
        Type: general
    Titles:
      – TitleFull: Machining of Ox-Ox (Al2O3/Al2O3) ceramics matrix composites by ultrafast laser.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Radhakrishnan, J.
      – PersonEntity:
          Name:
            NameFull: Marimuthu, S.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 25
              M: 10
              Text: Oct2024:Part B
              Type: published
              Y: 2024
          Identifiers:
            – Type: issn-print
              Value: 02728842
          Numbering:
            – Type: volume
              Value: 50
            – Type: issue
              Value: 20
          Titles:
            – TitleFull: Ceramics International
              Type: main
ResultId 1