The National Institute for Occupational Safety and Health (NIOSH), Office of Mine Safety and Health, Ground Control Engineering Branch is investigating the use of shotcrete in weak rock mass mines with the objective of reducing fatalities and injuries resulting from rock fall accidents. When shotcrete is used as part of a multielement ground support system, there is a need to know the support c...

High-entropy alloy particles reinforcements improve the mechanical properties of aluminum matrix composites while increasing its density. Investigating effects reinforcement content is conducive to fabrication lightweight and high strength composites. FeCoCrNiAl high-entropy (HEAp) reinforced 7075Al (HEAp/Al) with different HEAp volume fractions 5, 10, 15, 20 vol% were fabricated via a vacuum b...

For many decades, researchers have been working on finding innovative and sustainable solutions to address the enormous quantities of plastic waste that are produced every year which, after being collected, transformed into energy, recycled, or sent landfills. Giving a second life as material be incorporated, in form macro-fibres, concrete, could one such solution. The purpose this study was an...

Alumina (Al2O3) composite ceramics with different composition ratio and particle-size distribution were fabricated by the material extrusion photo-polymerization combined process (MEX-PPM) based on additive-manufacturing (AM) technology in our previous work. These particles nanosized Al2O3 (n-Al2O3), micron-sized TiCN (μ-TiCN) Al2O3. Effects of n-Al2O3 μ-TiCN investigated characterizing volume ...

The cement production consumes many natural resources and energy, pollutes the environment, cannot meet current building materials’ green sustainable development requirements. Therefore, geopolymers have gained popularity as replacements in recent years. Geopolymers promising characteristics such low energy consumption carbon footprint, valuable compressive strength, fire resistance, flame resi...

M42 HSS (W 2 Mo 9 Cr 4 VCo 8 ) is widely used as a high cobalt super-hard high-speed steel (HSS) for various cutting tool materials, but does not bring good economic benefits. In this paper, the effects of Si and Al on organization mechanical properties low were investigated. The microstructure was analyzed by OM, SEM, EDS, XRD, etc. Rockwell hardness test, impact toughness test flexural streng...