The powder technology method was used for the purpose of making samples from the compound (Al-10%Al2O3-%WC), where the first support material was used alumina Al2O3 at a fixed rate of 10% and the second support material WC was in different proportions (0,5, 10,15,20) %, the three powders were grinded together for a period of two hours, then put into a mold and the process was pressed with a hydraulic press at 5 tons for a time of one minute. An English-origin oven was used and the sintering process was done for the samples at 560°C and for a time of only two hours. After that, compositional tests (XRD), physical (real and apparent density, real and apparent porosity) and mechanical (diagonal compressive strength) were performed on the sintered samples. As these tests gave encouraging results with almost distinctive characteristics at a ratio of mixing of 20% WC and thermal sintering of 560°C, as the bulk density was within the limits of 5.51 g/cm3 while the real density was 4.9 g/cm3, while the minimum apparent porosity was 8.83% and the porosity. The real one is 11.76%, while the diagonal compressive strength is 45.33MPa. As for the structural results of the X-ray diffraction after the sintering process, it showed the emergence of a new phase of the tertiary metal oxide (WO3) and the (Triclinic) phase, as well as the emergence of tungsten carbide in the cubic phase.

This paper report on the possibility used new technique method by thermal spray coating to produce ceramic-metal coating of nano Al2O3-30%Wt. Ni samples. In this process nano crystalline cermet powders with grain size below 50nm were obtained by mechanical alloying. The steel substrates were degreased and grit blasted with SiC particles to get a mean roughness of 5µm. Experimentally the coating used under the best spraying parameters were deposited on steel substrate with thickness around 1.85mm. This powder and thick coating layers have been characterized by using XRD, SEM, EdS and hardness techniques. The X-ray results show that cerment coating consists a lot of phases such as ɤ-Ni, α-Al2O3 and ɤ-Al2O3 phases. The results also found that the wear resistance is superior, under high load conditions. The improved wear is attributed to the higher values of hardness. Results also show that Nickel was attractive for achieving good self-bonding with ceramic Al2O3 particles for all cerment samples.