Recently,the presentation of the metal-ceramic composite structure design provides an alternative idea for the improvement of components service performance,while conventional methods for joining metals and ceramics h...Recently,the presentation of the metal-ceramic composite structure design provides an alternative idea for the improvement of components service performance,while conventional methods for joining metals and ceramics have to involve a high heat input.However,due to the low melting point of magnesium alloys,the magnesium alloys-ceramics joining system necessitates a low joining temperature.Ultrasonic vibrations can induce numerous defects in the solid matrix,which can effectively promote atomic diffusion and metallurgical bonding between solid-phase interfaces at low temperatures.Thus,ultrasonic-assisted bonding is a highly promising method for achieving rapid and reliable joining between metals and ceramics without the use of interlayers.In this study,the direct bonding of AZ31B alloy with ZrO_(2) ceramic was successfully achieved at 200℃.A polycrystal spinel MgAl_(2)O_(4) with an average thickness of 55 nm was identified at the AZ31B/ZrO_(2) interface.The average shear strength of joints reached 30.47 MPa.Furthermore,the dynamic recrystallization of AZ31B and the oxygendepletion behavior of ZrO_(2) during the bonding process were characterized to illustrate the contribution of ultrasonic vibration to joint bonding.Consequently,the solid interfacial sono-oxidation reaction is proposed to discuss the bonding mechanism of the joint in detail.展开更多
基金supported by the Shandong Provincial Natural Science Foundation(ZR2023ME111).
文摘Recently,the presentation of the metal-ceramic composite structure design provides an alternative idea for the improvement of components service performance,while conventional methods for joining metals and ceramics have to involve a high heat input.However,due to the low melting point of magnesium alloys,the magnesium alloys-ceramics joining system necessitates a low joining temperature.Ultrasonic vibrations can induce numerous defects in the solid matrix,which can effectively promote atomic diffusion and metallurgical bonding between solid-phase interfaces at low temperatures.Thus,ultrasonic-assisted bonding is a highly promising method for achieving rapid and reliable joining between metals and ceramics without the use of interlayers.In this study,the direct bonding of AZ31B alloy with ZrO_(2) ceramic was successfully achieved at 200℃.A polycrystal spinel MgAl_(2)O_(4) with an average thickness of 55 nm was identified at the AZ31B/ZrO_(2) interface.The average shear strength of joints reached 30.47 MPa.Furthermore,the dynamic recrystallization of AZ31B and the oxygendepletion behavior of ZrO_(2) during the bonding process were characterized to illustrate the contribution of ultrasonic vibration to joint bonding.Consequently,the solid interfacial sono-oxidation reaction is proposed to discuss the bonding mechanism of the joint in detail.
