Preparation and characterization of step-wise Al-Al2O3

Abstract EN

In this work, simple ceramic-metal functionally graded materials with three different layers has been prepared and tested.

Ceramic and metal materials were represented by alumina and aluminum respectively.

Powder technology practices were used extensively in preparing each of four set of FGMs samples.

All samples have the same chemical composition.

Two variables were studied, compacting load and sintering temperature.

All samples were imparting graded hardness reading across the thickness.

The values of hardness readings are increased according to the hardest constituent’s increment (i.e.

Alumina) at constant sintering temperature and compacting load.

Compaction load increment as well as sintering temperature imparts another reasons for improvement in hardness properties.

Microscopic observations show an interesting features of the layers microstructure where composed from an aluminum and alumina particles and show good adhesive between alumina particles and Aluminum while Aluminum surrounded alumina particles from all studies due to good mixing practice during preparation stage.