Aluminum nitride surface modification mechanism by laser ultrasonic-assisted grinding

Aluminium nitride (AlN) is valuable for electronics and aerospace field. However, existing processing techniques are limited research on improving mechanical properties and strengthening mechanisms of AlN ceramics. Therefore, laser ultrasonic-assisted grinding (LUAG) is proposed, combining laser hea...

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Bibliographic Details
Published inTribology international Vol. 196; p. 109718
Main Authors Zhang, He, Sun, Cong, Hong, Yuan, Deng, Yansheng, Ma, Liang
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.08.2024
Subjects
Alumina reinforced phases
Aluminum nitride
Laser ultrasound-assisted grinding
Molecular dynamics
Laser ultrasound-assisted grinding
Molecular dynamics
Alumina reinforced phases
Aluminum nitride
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Summary:Aluminium nitride (AlN) is valuable for electronics and aerospace field. However, existing processing techniques are limited research on improving mechanical properties and strengthening mechanisms of AlN ceramics. Therefore, laser ultrasonic-assisted grinding (LUAG) is proposed, combining laser heating and ultrasonic vibration with abrasive grain processing technology. Meanwhile, the LUAG process is simulated by Molecular Dynamics (MD). The alumina generated by LUAG of AlN is used as a reinforcing phase for improving mechanical properties. Compared with traditional grinding (TG), the surface hardness of AlN can reach 1298HV. The friction wear coefficient and surface roughness reduce 50% and 28.4%, respectively. The results deepen the understanding of material removal and strengthening mechanisms under the coupled action of processing.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2024.109718