High Volume Fraction SICP/AL Composite Joining Method
A technology with high volume fraction and connection method, applied in the field of high volume fraction SiCp/Al composite material connection, which can solve the negative effects of microstructure, cannot reduce the thermal mismatch between the base material and the connecting material, and the large thermal stress deformation of the connection part, etc. problems, to avoid deformation and changes in microstructure, to ensure mechanical processing and use requirements, and to achieve the effect of high bonding strength
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Embodiment 1
[0035] Step 1. Prepare two pieces by gel injection molding process, the volume fraction of silicon carbide is 60%, and the size is 200×200×50mm 3 The surface of the silicon carbide prefabricated body to be connected is 200×200mm 2 For the grinding process, ensure that the connecting surfaces are smooth to each other. After the grinding process, remove the surface impurities, and brush with a layer of absolute ethanol, and dry it;
[0036]Step 2. According to the solid content of the silicon carbide preform, configure a connection slurry with a solid content close to it. Its components include 600g of silicon carbide abrasive with the same particle size as the silicon carbide preform as the silicon carbide aggregate, and 1ml of n-butanol as the defoamer , 400g of 40% silica sol as inorganic binder, 4g of PVA as organic binder, first dissolve PVA completely in silica sol solution with hot water bath, gradually add silicon carbide aggregate and stir to disperse evenly, and obtain...
Embodiment 2
[0041] Connection method of high volume fraction SiCp / Al composite material:
[0042] Step 1. Prepare two pieces of silicon carbide with a volume fraction of 55% and a size of 50×100×60mm by molding process 3 The connection surface of the silicon carbide prefabricated body is 50×100mm 2 For grinding, ensure that the joint surfaces are even and smooth. After the grinding, remove the surface impurities and brush a layer of absolute ethanol, and dry it. At the same time, use tin foil to cover the surface to be impregnated with aluminum alloy as a protective layer;
[0043] Step 2. According to the solid content of the silicon carbide preform, configure a connection slurry with a solid content close to that of the silicon carbide preform. Its components include 200 g of silicon carbide abrasive with the same particle size as the silicon carbide preform as aggregate, 0.5 ml of n-butanol as a defoamer, 200g of 30% silica sol is used as an inorganic binder. First, gradually add sili...
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