Uniaxial Compression Mechanical Properties of Foam Nickel/Iron-Epoxy Interpenetrating Phase Composites.

Xiaoxing Wang,Yu Zhou,Huijian Li,Jingli Li

doi:10.3390/ma14133523

Abstract

The damage process and failure mechanisms were analyzed by a series of quasi-static compressive experiments of seven materials including pure epoxy (EP), three different PPI (pores per linear inch) foam nickel-iron, and three different PPI foam nickel/iron-epoxy interpenetrating phase composites (IPC). Plotting the stress–strain curves of different materials, their change rules are discussed, then the effective elastic modulus and yield limit of the materials are provided, and the energy absorption properties of different materials are analyzed by the stress–strain curves. It was found that the effective elastic modulus and specific stiffness of the three IPC materials were higher than pure foam nickel-iron. The brittleness of epoxy can be obviously changed by selecting a suitable PPI foam nickel-iron composited with it. The unit volume energy absorption rate of foam nickel/iron-epoxy was significantly higher than pure epoxy and pure foam nickel-iron. It was also found that the energy absorption rate decreased with the increase in PPI. The stress relaxation rate decreased first and then increased with the increase in PPI. The creep behavior of the three composites was obvious in the creep elastic stage, and the creep rate increased with the increase in PPI. The creep rate decreased with the increase in PPI in the creep transition stage.

Highlights

The porous metal foam material has the advantages of sound absorption, shock absorption, light weight, heat resistance, and high strength, etc., and has been widely used in machinery, chemistry, construction, aerospace, biomedicine, and other fields [1]
From the perspective of morphological structure, the composite material is a composite of a continuous phase and one or more dispersed phases, or a composite of two or more continuous phases and one or more dispersed phases in each continuous phase; usually the continuous phase is called the matrix and the dispersed phase is the filler, which plays the role of strengthening, toughening, stiffening, or other functional properties
interpenetrating phase composites (IPC) is different from traditional composite materials such as foam Ni/Fe-EP IPC materials that combine the characteristics of metal and organic matter can be designed as a high strength, low stiffness, and high viscosity material

Summary

Introduction

The porous metal foam material has the advantages of sound absorption, shock absorption, light weight, heat resistance, and high strength, etc., and has been widely used in machinery, chemistry, construction, aerospace, biomedicine, and other fields [1] This microstructure is composed of a framework and internal pores make it have both the properties of metal materials and foam materials. IPC is different from traditional composite materials such as foam Ni/Fe-EP IPC materials that combine the characteristics of metal and organic matter can be designed as a high strength, low stiffness, and high viscosity material It keeps the foam metal electromagnetic shielding properties and low thermal conductivity of an epoxy. According to the actual engineering needs, it can design a composite material that meets certain mechanical properties, and has one or more functions This new material can be used for anti-collision materials that are often applied in aerospace, transportation, and other fields. It can be a new type of damping material as well as a new type of electromagnetic shielding and vibration isolation building material

Methods

Results

Conclusion