A novel route for the fabrication of core–shell structured V–MgO alloys via in situ MgO formation is developed. Spark plasma sintering is employed to obtain fully dense V–
x
MgO (
x
= 1, 2.5, 5 wt.%) samples. The sintered alloys consist of vanadium grains with finely dispersed MgO particles uniformly distributed along the grain boundaries. An increase in oxidation resistance at 600 °C is achieved for alloys containing more than 2.5 wt.% MgO. XRD analysis shows that during oxidation, V
2
O
5
reacts with MgO, leading to the formation of MgO
6
V
2
and Mg
2
O
7
V
2
oxides. However, these compounds formed at high temperature are not stable in ambient air with atmospheric CO
2
since it forms MgCO
3
. For further development of this concept, other more stable vanadate formers need to be investigated. The room temperature compressive strength increases from 1350 MPa for pure vanadium to 2180 MPa for the V–5MgO alloy, while at 600 °C it increases from 300 to 350 MPa.
The goal of this project was to investigate the microstructure, hardness as well as corrosion behavior of Al - 4% Mg metal matrix composites containing boron carbide (B₄C) particles at different weight fractions (3, 6, and 9 wt.%). Composites were produced through powder metallurgy by compacting, sintering and characte...
Enas Khudhair, Asraa T. Nasser, B. M. Shaker et al.· Research on Engineering Stru...· 0 citations
As-extruded Mg-6Al-1Zn-0.5Cu and Mg-6Zn-0.5Cu alloys with comparable strength were prepared, and their dissolution behaviors in KCl solutions with different Cl
−
concentrations were investigated for use as fracturing balls. The results of electrochemical and immersion tests consistently demonstrated that Mg-6Al-1Zn...
Hongmin Jia, Zhongrong Zhang· Materials Science and Techno...· 0 citations
In this study, an Al–20 wt.% Mg alloy was synthesized to systematically correlate its electrochemical behavior in synthetic seawater with the microstructural evolution induced by heat treatment at 190, 300, and 350 °C for 6 h. The samples characterized by SEM and XRD reveal a progressive morphological evolution of the...
José Damián Calan-Canche, Alfredo Reda-Cruz, Salatiel Pérez-Montejo et al.· Materials· 0 citations
Increased interest in the creation of materials with exceptional properties, such as high-entropy alloys, necessitates the development of production methods, one of which is aluminothermic synthesis. This study investigates the processes involved in the production of the lightweight refractory high-entropy alloy Al...
A. Russkih, E. M. Zhilina, R. Gulyaeva et al.· Powder Metallurgy аnd Functi...· 0 citations
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