Research On The Structure Changing Of The SiCp/ZL101A Vibration Brazing Bond

The process of removing defect of the bond was studied in this paper, taken particulate-reinforced SiCp/ZL101A composites as the research object.In chapter 3 the flow field inside the bonding during the first vibration was simulated via the software of ADINA. Results show that the oxide film on the surface of the composites can be removed, and the vibration is good and also bad for the removing of porosity. We want to get a perfect bond without porosity by changing the bond shape.In chapter 4 the study of the bond shape and the condition change of the bond with the temperature show that the biggest width of the dissolution area became bigger and bigger with the temperature rising. The bond is fluid during condition was studied during the temperature raising.In chapter 5 the flow field inside the bonding during the second vibration was simulated. Results show that the flow can break the removed oxide of the 1.4mm wide bond, which is good for the porosity removing. The 1.4mm bond's pressure filed can also help to push the porosity away. The 0.85mm bond has such pressure filed too, but its disorder flow and unsoiled oxide will stop the moving of the porosity.In chapter 6 we got a good bond without porosity by experiment on the ground of the stimulation. The performance was measured, and the results show that the intensity of the bond is better than composites. The bond is less of toughness, but we can improve it by anneal.The intensity of the bond became higher when the vibration time was longer. The microstructure change of the bond made by vibration was the main reason.