JSWL Advanced Materials Technology Group, in conjunction with Haijiao Jiaotong University, has conducted a lot of research in material system development and powder manufacturing process research, and has successfully developed high-performance ceramic-aluminum composite powders suitable for 3D printing. The maximum tensile strength of the printed parts exceeds 540MPa, and the maximum elongation at break exceeds 15%.
Application example-electronic chip welding key components
The technical teams of the two sides combined with the characteristics of ceramic-aluminum composite materials, starting from three aspects: special equipment, process control, and integrated design of material components:
1. In the design of special equipment, the temperature control system, exhaust system and atomization system are optimized, and a special powder post-treatment process is designed, which greatly reduces the ratio of satellite spheres and hollow spheres, and shortens the Hall flow rate of the powder to 75s Within 50g, the loose packing density is increased to above 1.4g/cm3;
2. Through the whole process control, the batch stability of key indicators such as powder composition, particle size and oxygen content has been greatly improved;
3. Introducing the secondary smelting control technology of TiB2 nanoparticles, and the design of the composition, so that the TiB2 strengthening phase can be maintained in the same state during the process of preparing raw materials, producing powders and printing parts, which not only overcomes the laser absorption of aluminum alloy The problem of low efficiency can also form an ultra-fine equiaxed crystal structure, which solves the problem of continuous industrial production of ceramic-aluminum composite materials.
In the existing cases of mass printing, whether it is imported or local Chinese equipment, the printing performance of ceramic aluminum powder is very good, even exceeding the high-strength aluminum alloy reinforced by rare earths.