We developed a procedure for sintering titanium-aluminium composites reinforced with ceramic particles, allowing the preparation of thickly sintered samples under atmospheric pressure. This procedure is a significant technological innovation that will allow industrial production of these materials.
F.01 Acquisition of new practical knowledge, information and skills
COBISS.SI-ID: 13353238We mastered the procedure for preparing the TiAl, Ti3Al and TiAl3 powders from the elements and later developed the procedure for sintering composites with a matrix based on TiAl, Ti3Al and TiAl3 reinforced with ceramic particles under atmospheric pressure. The procedure is highly innovative, allowing a simple and cheap preparation of densely sintered (?95% T.G.) samples with 10-50 vol. % of ceramic reinforcement. The sintered composites have better tensile properties and an increased microhardness. However, the fracture toughness is greater in the case of the infiltrated composite samples.
F.01 Acquisition of new practical knowledge, information and skills
COBISS.SI-ID: 13436950We developed a procedure for obtaining the Mg2Si alloy from elements appropriate for either pilot or industrial production. We prepared two types of composites from the produced Mg2Si powders: (1) Mg2Si-TiC or Mg2Si-TiB2 and (2) the composites with an Mg-based matrix discontinuously reinforced with Mg2Si and TiC particles. We produced composites with an Mg2Si matrix with sintering under atmospheric pressure and composites with an Mg matrix using infiltration. The sintered composites ensure high strength and hardness, while the infiltrated have an improved fracture toughness.
F.01 Acquisition of new practical knowledge, information and skills
COBISS.SI-ID: 13648150Experiments approved that the synthesis from elements, successfully applied for the preparation of some other binary intermetallic alloys, is also effective for the preparation of the Mg2Sn alloy. In addition, with a surplus of magnesium, the reduction of the level of impurities to below 0.2% was achieved. Finally, the mechanical properties of sintered and infiltrated composites were successfully tailored by changing the type of the matrix (Mg2Sn in the sintered samples, and Mg or Al in the infiltrated samples), as well as the volume fraction and morphology of the discontinuous reinforcement.
F.01 Acquisition of new practical knowledge, information and skills
COBISS.SI-ID: 13605142In the report we describe the preparation and characterisation of the Mg2Si-TiC and Mg2Si-TiB2 composites, emphasizing the development of the methods for infiltration and sintering under atmospheric pressure, the study of the microstructure and its influence on the improved mechanical properties (tensile test, resistance to fracture, hardness) at the level of prototype samples.
F.01 Acquisition of new practical knowledge, information and skills
COBISS.SI-ID: 13607958