Microstructure of In-situ Reaction TiB_2/Zn-30Al-1Cu Composite By Spray Forming Process
An innovative spray deposition technique was applied to produce in-situ TiB2/Zn-30Al-1Cu composite.The microstructure of the composite was studied by using optical microscopy,scanning electron microscopy and X-ray diffraction.Both theoretical and experimental results have shown that TiB2particulates appear in the microstructure.The results show that TiB2particles distribute in Zn-30Al-1Cu matrix uniformly,and the TiB2particles are about 2 μm in size.Moreover,the presence of TiB2particles can lead to the refinement of the microstructure of matrix,and the increase of α'phase with less 2 μm size in the composite.