A New Titanium-Aluminum Carbide Particle Reinforced Zinc-Aluminum Matrix Composite Material

The particle reinforcement phase in the material is evenly distributed, the matrix and the reinforcement phase are closely combined, there are few defects, and it has good physical and mechanical properties. The steps of the hot-press sintering preparation method are as follows:
 
1) Weigh the titanium-aluminum carbide powder and zinc-aluminum alloy powder;
 
2) Mix the two powder ball mills weighed in step 1) for 6 to 48 hours;
 
3) Put the mixed powder of step 2) into a mold and perform hot press sintering to obtain a titanium-aluminum carbide particle reinforced zinc-aluminum-based composite material.

 
The particle-reinforced phase titanium aluminum carbide (Ti3AlC2) is a ternary layered carbide ceramic, which not only has high electrical conductivity, thermal conductivity, high temperature plasticity and machinability similar to metal, but also has the high elasticity of ceramics Modulus, low density, high thermal stability and good oxidation resistance; and it has self-lubricity and excellent tribological properties. Titanium aluminum carbide belongs to the hexagonal crystal system. The common Ti-C octahedrons in the crystal structure are separated by a plane layer of Al atoms. The C atom is located in the center of the Ti octahedron. The bond between the Ti atom and the C atom is a strong covalent bond , And the bond between Ti atoms and Al atomic layers is similar to the weak bond between graphite layers. These characteristics of titanium aluminum carbide make it have its unique advantages when used as the particle reinforcement phase of zinc-aluminum-based composites.