EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

Two types of novel aqua-based complex slurries having compositions of (5%SiO2 - 10%ZrSiO4 - 10%Y2O3 - 10%ZrO2) and (10%ZrSiO4 - 15%Y2O3 - 10%ZrO2) have been introduced into the casting of IN-718 superalloy in ZrSiO4 molds. The effect of ceramic slurries on the course of interfacial phenomena between IN-718/ZrSiO4 was firstly evaluated in high-temperature wettability experiments by the sessile...

Computational studies of the phase microstructure can assist greatly in the design of Cu-Sn material for joining and energy applications. The phase field method is a very popular method for mechanistic studying of the spatial-temporal evolution of phases in the material’s microstructures. In Cu-Sn system consisting of LIQUID (Sn-rich), IMC (Cu6Sn5) and FCC (Cu-rich) phases at 523.15 K, the...

Information on thermophysical properties of molten metals and alloys and their high temperature behaviour in contact with different solid materials is of a great practical importance for liquid-assisted materials processing, particularly for computer-aid liquid metal engineering and process optimisation.
To meet the constantly growing interest in knowledge of the factors influencing the...

The microstructure of Ti-based polycrystalline alloys with iron, cobalt, nickel and cromium as well as Zr-Nb alloys has been studied in the temperature and concentration interval where two phases, namely, hexagonal α-Ti or α-Zr and cubic β-Ti or β-Zr are in equilibrium. The α-Ti or α-Zr phase forms either continuous or discontinuous layers in the β-Ti/β-Ti or β-Zr/β-Zr grain boundaries (GBs)....

Explosive welding (EXW) is the one high-energy-rate metalworking operations, which leads to metals joining as an effect of a collision of plates at high velocities. The collision is caused by a controlled detonation of an explosive charge, which accelerates a top (flyer) clad towards a fixed bottom (base) metal or alloy sheet. Due to the high velocity collision the metallic clads are subjected...

The paper studies the wetting of grain boundary triple junctions (GB TJs) by the second solid phase (intermetallic) δ in the Cu–In alloys. In this system, the portion of grain boundaries in a copper-based solid solution (Cu), which are "wetted" by the second solid phase Delta, changes non-monotonically with increasing temperature. At first, the portion of such completely wetted GB increases...

This study contains the comprehensive analysis of the interface zone microstructure formed in A1050/S355J2N bimetal fabricated by explosive welding technology. The flyer plate of a 5 mm in thickness sheet of technically pure aluminum was shot into the base material – a 5 mm thick carbon steel plate of improved strength and weldability. Aluminum alloy is characterized by very good resistance to...

Properties of the triple alloys belonging to the Cu-Zn-In system are not well known. This may results from the experimental troubles caused by the large differences in the melting temperatures ofcomponentsand Zn ability for intensive evaporation. There is also no ternary phase diagram available.In spite of that, the differences in the properties of components suggest that triple CuZnIn alloys...

The main goal of the project INSURFCAST is to design appropriate innovative ceramic surfaces and procedures which would enable the use of innovative binary and ternary nickel superalloys for the production of complex-shaped blades by precision investment casting. For this alloys thermophysical properties data and their interpretation not yet available in the literature. This paper present ...

For the first time in laboratory practice, the specifics of the high-temperature interaction of liquid magnesium with carbon aerogel (AC) based on reduced graphene oxide were examined experimentally. It was found that at a temperature of 700°C in an atmosphere of pure argon, liquid magnesium exhibits good adhesion to the AC substrate and forms a permanent bond with it, which does not degrade...

In this work, the effect of nano-Y2O3 coating on the interfacial phenomena between commercial IN-718 nickel based superalloy and zirconium silicate (ZrSiO4) was evaluated in terms of possible applications in casting technologies. For this purpose, wettability experiments by sessile drop method was carried out at 1500°C. For the sake of comparison, the test was arranged in a "two-in-one" mode,...

Since the 1st of June 2006, the RoHS EU directive was implemented in most of the European countries and the use of lead has been dramatically reduced. The commonly applied Sn-Pb solder alloy was restricted for selected applications only, and the Sn-Ag-Cu alloys (SAC) were implemented in production practice.
One of SAC’s implementation issues is associated with the difficulties in quality...

A new approach to cooling systems proposes the use of the metal alloys characterized by high heat capacity and thermal conductivity compared to water. The application of liquid metal as a coolant in the nuclear power industry and in renewable energy sources, electronics devices, new cooling management system using electromagnetic pumps and Li-ion batteries, increases the efficiency and...

The study of wetting and interfacial phenomena occurring when a liquid metal comes into contact with a ceramic surface is of interest for several technological application such as joining by brazing, casting, infiltration to produce composites, deposition of coatings, etc.
In this work, the wetting behavior of TiAlX (X = Cu, Ni, Fe) alloys on alumina is studied by the sessile drop method at...

Functional ceramics with the perovskite structure are broadly used in electronic components as, for instance, high permittivity capacitors, piezoelectric components, and so on. Among them, BaTiO₃-based materials find their main application in multilayer ceramics capacitors (MLCCs), with an annual production of 11 thousand tons. In the development of new devices based on these...