Polymer composites filled with metal derivatives have been widely used in recent years, particularly as flame retardants, due to their superior characteristics, including high thermal behavior, low environmental degradation, and good fire resistance. The hybridization of metal and polymer composites produces various favorable properties, making them ideal materials for various advanced applications. The fire resistance performance of polymer composites can be enhanced by increasing the combustion capability of composite materials through the inclusion of metallic fireproof materials to protect the composites. The final properties of the metal-filled thermoplastic composites depend on several factors, including pore shape and distribution and morphology of metal particles. For example, fire safety equipment uses polyester thermoplastic and antimony sources with halogenated additives. The use of metals as additives in composites has captured the attention of researchers worldwide due to safety concern in consideration of people’s life and public properties. This review establishes the state-of-art flame resistance properties of metals/polymer composites for numerous industrial applications.

https://www.mdpi.com/2073-4360/13/11/1701/pdf

Polymer Composites Filled with Metal Derivatives: A Review of Flame Retardants.

In this study three-roll planetary milling was used to trial its potential for enhancing the mechanical properties of pure magnesium. The material was subjected to several passes of planetary milling at progressively decreased temperatures, down to room temperature for the last pass. It was shown that with increased number of passes the grain size was reduced, eventually to the micron range. Concurrently, the microstructure became increasingly more uniform across the billet. After six passes pure magnesium showed an excellent combination of tensile properties at room temperature, with a yield stress of 116 MPa and a strain to failure of 13%.

Improving the mechanical properties of pure magnesium by three-roll planetary milling

The influence of the rolling speed on microstructure and mechanical properties of as-rolled AZ31 Mg alloys sheet was critically examined. Samples were hot rolled by nearly 55% thickness reduction in a single rolling pass at rolling speeds varying between 3.5 and 12.1 m/min. The results showed that twinning dominated the deformation at lower rolling speed and dynamic recrystallization was constricted in shear bands. While, at high rolling speed, dynamic recrystallization behavior was largely extended and microstructure became homogeneous. The yield behavior of as-rolled sheets was affected by the recrystallized grains formed during rolling. The tensile ductility was gradually improved as rolling speed increased, due to the enhancement of dynamic recrystallization. The dynamic recrystallization is an effective way to consume the deformation energy, which may suppress edge crack initiation.

Influence of rolling speed on microstructure and mechanical properties of AZ31 Mg alloy rolled by large strain hot rolling

The lost foam casting (LFC) process was used to prepare the A356 aluminum and AZ91D magnesium bimetallic castings, and the interface characteristics of the reaction layer between aluminum and magnesium obtained by the LFC process were investigated in the present work. The results indicate that a uniform and compact interface between the aluminum and magnesium was formed. The reaction layer of the interface with an average thickness of approximately 1000 μm was mainly composed of Al3Mg2 and Al12Mg17 intermetallic compounds, including the Al3Mg2 layer adjacent to the aluminum insert, the Al12Mg17 middle layer, and the Al12Mg17 + δ eutectic layer adjacent to the magnesium base. Meanwhile, the Mg2Si intermetallic compound was also detected in the reaction layer. An oxide film mainly containing C, O, and Mg elements generated at the interface between the aluminum and magnesium, due to the decomposed residue of the foam pattern, the oxidations of magnesium and aluminum alloys as well as the reaction between the magnesium melt and the aluminum insert. The microhardness tests show that the microhardnesses at the interface were obviously higher than those of the magnesium and aluminum base metals, and the Al3Mg2 layer at the interface had a high microhardness compared with the Al12Mg17 and Al12Mg17 + δ eutectic layers, especially the eutectic layer.

Investigation on the Interface Characteristics of Al/Mg Bimetallic Castings Processed by Lost Foam Casting

Anisotropic mechanical behavior of biomedical Ti-13Nb-13Zr alloy manufactured by selective laser melting

Synthesis and characterization of Ti–Ta–Nb–Mn foams

Improved ductility in ZM21 magnesium–aluminium macrocomposite produced by co-extrusion

Extrusion and precipitation hardening behavior of AZ91 magnesium alloy

Adding different reinforcements to the polymer composite is gaining more importance in the manufacturing industries because of their variation in mechanical properties. To satisfy modern industrial...

Dynamic mechanical characteristics of jute fiber and 304 wire mesh reinforced epoxy composite

This work was investigated that the effect of aluminium (Al) and copper (Cu) wire mesh embedded as a structural reinforcement on jute epoxy hybrid composite The hybrid composites were prepared by 

M. Thirumurugan

Papers

Synthesis and characterization of Ti–Ta–Nb–Mn foams

Improved ductility in ZM21 magnesium–aluminium macrocomposite produced by co-extrusion

Extrusion and precipitation hardening behavior of AZ91 magnesium alloy

Dynamic mechanical characteristics of jute fiber and 304 wire mesh reinforced epoxy composite

Performance of fiber metal laminate composites embedded with AL and CU wire mesh