As a specialized master alloy, AlTi5C0.2Ptnot only makes the aluminum alloy obtain more and finer equiaxed crystals with more even distribution, but also enhances its strength and toughness, and improves its electrical conductivity.
The AlTi5C0.2Pt master alloy contains a large amount of titanium carbide particles (TiC), which are used as a heterogeneous core to effectively refine the aluminum alloy grains to obtain a smaller molecular spacing. On the other hand, these particles have high chemical stability. Like the metal aluminum, they belong to the NaCl type face-centered cubic structure, their lattice constant is 0.4329 nm, and their space group is Fm3m. At the lattice position, carbon atoms are equivalent to titanium atoms. TiC atoms are strongly covalently bonded and have some properties similar to metals, such as high melting point and boiling point (melting point 3067 ° C, boiling point 4820 ° C ), good thermal stability, good thermal and electrical conductivity, and even superconductivity at very low temperatures.
There is no KBF4 in its raw materials, so AlTi5C0.2Pt has much less salt inclusion. And, there is no TiB2, so no aggregation and precipitation, no clogging of the filters, and so more non-metal inclusions will be filtered out. Since all the above, the aluminum melt will be cleaner by using AlTi5C0.2Pt, and so the UTS, elongation, and conductivity will be improved.
Besides, the AlB2, generated from AlB master alloys, will react with redundant Ti in AlTi5B1, so that the refinement effect of AlTi5B1 will be affected badly. Furthermore, AlB2 will generate TiB2 with the redundant Ti; too much TiB2 will result in worse conductivity and mechanical properties. AlTi5C0.2Pt will not act so, since TiC can nucleate without redundant Ti, and will not aggregate and precipitate easily.
In summary, the addition of TiC particles can effectively enhance the ultimate tensile strength, elongation, and heat resistance of the aluminum alloy conductor, and improve the conductivity simultaneously. The trace amount of metal platinum (Pt) acts as a catalytic activity function to further enhance the conductivity and elongation of the material. The multiphase conductive materials prepared by them can make the aluminum material replace the copper material to a greater extent.