Metallization of Al2O3 ceramic with Mg by friction stir spot welding. Issue 9 (1st May 2021)

• Record Type: Journal Article
• Authors: Sonomura, Hirosuke; Ozaki, Tomoatsu; Katagiri, Kazuaki; Hasegawa, Yasunori; Tanaka, Tsutomu; Kakitsuji, Atsushi
• Is Part Of: Ceramics international. Volume 47:Issue 9(2021)
• Page Start: 12789
• Page End: 12794
• Publication Date: 2021-05-01
• Subjects: Joining -- Interfaces -- Al2O3 -- MgO; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.01.139
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The surfaces of Al2 O3 ceramic plates were metallized with by a friction stir spot welding method. Tensile tests revealed that the adhesive strength between the Mg film and Al2 O3 ceramic plate was 23.3 MPa. To investigate the origin of this strong adhesion, the interface structure was examined by X-ray diffraction, scanning transmission electron microscopy–energy-dispersive X-ray spectroscopy, and transmission electron microscopy. The results indicated the formation of a microcrystalline MgO layer at the interface. Furthermore, the surfaces of two metallized Al2 O3 ceramic plates separated by Ni foil were bonded together by hot pressing at 1100 °C for 180 min under vacuum. The resulting cross tensile strength of the bonding was 2.1 MPa, indicating strong adhesion between the Al2 O3 ceramic plates. Graphical abstract: Image 1 Highlights: A new metallization technology was realized by friction stir spot welding (FSSW). Al2 O3 ceramic plates were metallized with Mg foil. The adhesive strength between the Mg film and Al2 O3 ceramic plate was 23.3 MPa. The surfaces of two metallized Al2 O3 ceramic plates were hot pressed with Ni foil. The cross tensile strength between the two Al2 O3 ceramic plates was 2.1 MPa.