The standard method for applying hydroxyapatite (HAp) coatings to biomedical implants is plasma spraying. However, due the high temperature of plasma, these frequently experience negative effects like evaporation, phase change, de-bonding, gas release, and residual stresses. This paper summarizes a revolutionary technique known as cold spray (CS), which allows HAp be applied at temperatures wel...

Austenitic high-manganese steels (HMnS) offer very high wear resistance under dynamic loading due to their work hardening capacity. However, static abrasive is limited. Various approaches increasing abrasion are known from traditionally manufactured metallurgical components. These confirm the potential for surface protection applications. In this work, powder of Hadfield HMnS X120Mn12 prepared ...

With the development of modern industrial technology, there is an increasingly urgent need for preparation high-strength and high-performance coatings on surface traditional metal materials [...]

In the present research, the spherical FeCoCrNiMo0.2 high entropy alloy (HEA) powders with a single FCC solid solution structure were prepared by gas atomization. Subsequently, the FeCoCrNiMo0.2 coatings with a different content of oxide inclusions were prepared by air plasma spraying (APS) and high-velocity oxy-fuel spraying (HVOF), respectively. The microstructure, phase composition, mechanic...

Since the Kyoto conference there is a broad consensus that the human emission of greenhouse gases, mainly CO2, has to be reduced. In the power generation sector there are three main alternatives which are currently studied world wide. Among them oxy-fuel cycles with internal combustion with pure oxygen are a very promising technology. Within the European project ENCAP – ENhanced CO2 CAPture the...

Oxidation of sulfide-containing ores is the main cause of Acid Mine Drainage (AMD), which is an environmental problem associated with both the abandoned and active mines. Iron-bearing sulfide minerals can be oxidized and form mine waters with high sulfate content, low pH, high electrical conductivity, high redox potential, and high concentrations of iron, aluminum, and other heavy metals. In th...

The thermal reactivity and kinetics of four coal chars (HVN, UM, SAB and BA) in an oxy-fuel combustion atmosphere (30%O2-70%CO2) were studied using a thermobalance. The coal chars were obtained by devolatilization in an entrained flow reactor (EFR) at 1000 oC for 2.5 s under 100% N2 and CO2 atmospheres. The reactivity tests were carried out by isothermal thermogravimetric analysis at different ...