Types of Component Interfaces in Metal Matrix Composites on the Example of Magnesium Matrix Composites

Abstract

In this paper, a summary of investigations of the microstructure of cast magnesium matrix composites is presented. Analyses of the interfaces between the reinforcing particles and the magnesium alloy matrices were performed. Technically pure magnesium and four various alloys with aluminum and rare earth elements (RE) were chosen as the matrix. The composites were reinforced with SiC and Ti particles, as well as hollow aluminosilicate cenospheres. Microstructure analyses were carried out by light, scanning, and transmission electron microscopy. The composites with the matrix of magnesium and magnesium–aluminum alloys with SiC and Ti particles exhibited coherent interfaces between the components. In the composites based on ternary magnesium alloy with Al and RE with Ti particles, a high-melting Al2RE phase nucleated on the titanium. Different types of interfaces between the components were observed in the composites based on the magnesium–rare earth elements alloy with SiC particles, in which a chemical reaction between the components caused formation of the Re3Si2 phase. Intensive chemical reactions between the components were also observed in the composites with aluminosilicate cenospheres. Additionally, the influence of coatings created on the aluminosilicate cenospheres on the bond with the magnesium matrix was presented. A scheme of the types of interfaces between the components is proposed.

The Effect of Reinforcement Preheating Temperatures on Tribological Behavior of Advanced Quranic Metal-Matrix Composites (QMMC)

“…As revealed by optical and SEM images (Figure 5a,b,d), the interface has a discontinuous thin (about 11 µm) oxide layer containing micro-cracks and voids. This layer could hinder the bonding between the copper matrix and the steel rod [31]. The EDS profile collected from the interface region (Figure 5c) shows peaks of copper (Cu), iron (Fe), and oxygen (O), confirming the ma-…”

“…Figure 5 presents an exemplary microstructure of QMMC prepared by pouring molten copper onto the steel rod at 600 • C. As revealed by optical and SEM images (Figure 5a,b,d), the interface has a discontinuous thin (about 11 µm) oxide layer containing micro-cracks and voids. This layer could hinder the bonding between the copper matrix and the steel rod [31]. The EDS profile collected from the interface region (Figure 5c) shows peaks of copper (Cu), iron (Fe), and oxygen (O), confirming the matrix-reinforcement bonding and the oxidation of the reinforcement's surface.…”

Studies on Corrosion Behavior of Mg-Al-Zn-RE Cast Alloy with Powder-Coated Al and CED Mg by Salt Spray Test, Immersion Test, and Electrochemical Test

“…Because Mg and its alloys exhibit high speci c strength compared to other structural metallic materials, they have a wide range of uses due to their high mechanical properties and malleability, damping characteristics, and better shielding on electromagnetic elds [4]. Automobile manufacturers have been studying the bond between the mass of the vehicle and efciency in fuel for periods so that they can encounter consumer demands for more e cient consumption of fuel [5]. Hence, emissions can be reduced in an era of increasing eco-friendly environment [6].…”

Latest research and developments of ceramic reinforced magnesium matrix composites—A comprehensive review

“…Variations in the characteristics of the magnesium composite are seen depending on the reinforcement, its shape, and the amount of reinforcement distributed. 5,6 Magnesium (Mg), aluminum (Al), titanium (Ti), copper (Cu), and nickel (Ni) alloys are the most frequently used MMCs. Al, Mg, and Ti alloys were used in aircraft, missiles, automobiles and in several applications for weight reduction where steel, Ni, and Cu alloys are commonly used for heavy industrial component and tooling, etc.…”