Novel magnesium matrix hybrid composites manufactured through powder metallurgy technique

Abstract

Listen

Translate article

In the present study, novel magnesium matrix hybrid composites have been developed through the addition of titanium and nickel micro particulates using the hot pressing technique which is one of the powder metallurgy methods. Titanium and nickel elements were first-time used in combination as reinforcing materials in the manufacture of hybrid composites. A clean interface was obtained free from porosity, oxide and unwanted secondary phases between the matrix and reinforcement in all produced samples. In addition to the matrix and reinforcement phases, the Mg2Ni phase was also observed in the microstructural characterizations. The existence of this phase was confirmed through XRD analyses, its peak intensity increased with the increasing amount of reinforcement. While the addition of Ti and Ni provided a mean of 33 % and 83 % improvement in the yield strength and compressive strength of pure magnesium at room temperature, respectively, they did not cause a serious decrease in ductility values compared to those of ceramic reinforcement materials. The yield and compressive strengths of hybrid composites were found to be greater than those of the reference sample at all test temperatures. The mechanical properties such as yield strength, compressive strength and ductility together with low densities have shown that produced hybrid materials constitute an important alternative to traditional materials such as iron, steel and even aluminum frequently used in the manufacture of automobile components.