TY - JOUR
T1 - Microstructure and characterization of interfacial phases of sapphire/sapphire joint bonded using Bi2O3–B2O3–ZnO glass
AU - Guo, Wei
AU - Lin, Tiesong
AU - He, Peng
AU - Sekulic, Dusan P.
AU - Sun, Zhan
AU - Lin, Panpan
AU - Shan, Xiao
AU - Feng, Guangjie
AU - Wu, Bingzhi
AU - Wang, Maochang
N1 - Publisher Copyright:
© 2016 Elsevier Ltd
PY - 2017/3/1
Y1 - 2017/3/1
N2 - Bismuth borate zinc glass, 50Bi2O3–30B2O3–20ZnO (mol.%), was used as a braze intended to join sapphire. Thermal properties of the glass were all experimentally determined. The wettability of the glass on sapphire was investigated. The contact angle not greater than 11.3° was obtained in air at temperatures of ≥700 °C. Subsequently, sapphire was successfully joined to themselves at 700 °C for 20 min. The microstructure of the joint was studied and the interfacial phases were characterized. The results showed that the ZnAl2O4 phase was formed as a result of the reaction between the sapphire substrate and ZnO from the glass. The mechanical integrity of the joints was investigated. The joints with an average room shear strength of 70 MPa were achieved. The fracture analysis indicated that the fracture occurred within the glass interlayer rather than at the sapphire/glass interface, hence indicating a good bonding of the glass with sapphire.
AB - Bismuth borate zinc glass, 50Bi2O3–30B2O3–20ZnO (mol.%), was used as a braze intended to join sapphire. Thermal properties of the glass were all experimentally determined. The wettability of the glass on sapphire was investigated. The contact angle not greater than 11.3° was obtained in air at temperatures of ≥700 °C. Subsequently, sapphire was successfully joined to themselves at 700 °C for 20 min. The microstructure of the joint was studied and the interfacial phases were characterized. The results showed that the ZnAl2O4 phase was formed as a result of the reaction between the sapphire substrate and ZnO from the glass. The mechanical integrity of the joints was investigated. The joints with an average room shear strength of 70 MPa were achieved. The fracture analysis indicated that the fracture occurred within the glass interlayer rather than at the sapphire/glass interface, hence indicating a good bonding of the glass with sapphire.
KW - Bismuth borate zinc glass
KW - Microstructure
KW - Sapphire joining
KW - Wettability
KW - Zinc aluminate (ZnAlO)
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U2 - 10.1016/j.jeurceramsoc.2016.10.010
DO - 10.1016/j.jeurceramsoc.2016.10.010
M3 - Article
AN - SCOPUS:84995878383
SN - 0955-2219
VL - 37
SP - 1073
EP - 1081
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 3
ER -