Investigation on Inorganic Salts K2TiF6 and KBF4 to Develop Nanoparticles Based TiB2 Reinforcement Aluminium Composites.

Vinayagam Mohanavel,Hesham S Almoallim,Saleh Alfarraj,J Isaac Joshuaramesh Lalvani,T Sathish,K Ravi Kumar,Shanmugam Sureshkumar,Palanivel Velmurugan,Alagar Karthick,M Ravichandran,Kumaran S

doi:10.1155/2022/8559402

Abstract

In the current research, AA6082 aluminium alloy matrix composites (AAMCs) incorporated with various weight fractions of titanium diboride (0, 3, 6, and 9 wt%) were prepared via an in situ casting technique. The exothermic reaction between inorganic powders like dipotassium hexafluorotitanate (K2TiF6) and potassium tetrafluoroborate (KBF4) in molten Al metal contributes to the development of titanium diboride content. The manufactured AA6082-TiB2 AAMCs were evaluated using a scanning electron microscope (SEM) and X-ray diffraction (XRD). The mechanical properties and wear rate (WR) of the AAMCs were investigated. XRD guarantees the creation of TiB2 phases and proves the nonappearance of reaction products in the AMCs. SEM studies depict the even dispersion of TiB2 in the matrix alloy. The mechanical and tribological properties (MTP) of the AAMCs showed improvement by the dispersion of TiB2 particles. The WR decreases steadily with TiB2 and the least WR is seen at nine weight concentrations of TiB2/AA6082 AAMCs. Fabricated composites revealed 47.9% higher flexural strength and 14.2% superior compression strength than the base AA6082 alloy.

Highlights

In recent scenarios, a huge number of research studies has shifted from monolithic materials to composite materials to meet the improving universal demand for high performance, ecofriendly corrosion, erosion, and wear-resistant materials.e improvement of lightweight and fewer costly materials with enriched performance for automobiles, construction, aviation, aircraft, and several engineering applications is always a concern of numerous research workers [1, 2]. e foremost goal involved in developing composite (AMC) materials is to merge the ductile matrix metals and hardBioinorganic Chemistry and Applications ceramic particles
E aluminium alloy matrix composites (AAMCs) are broadly manufactured through the liquid state route. e liquid state processing method may be of two types: ex situ and in situ fabrication [6,7,8]. e in situ process exhibits even scattering of particles [9]. e type of filler or reinforcement material significantly influences the mechanical and tribological properties (MTP) of the AMCs
Microstructural examination proves the homogeneous dissemination of TiB2 filler content in the AA6082 alloy and exhibits a strong attachment between the secondary and primary material. e scanning electron microscope (SEM) photograph presented in Figures 3(e) and 3(f ) shows the stable and pure interface between the parent metal and TiB2 filler content. e Al matrix-TiB2 particle interface indicates a high level of interface consistency between the AA6082 matrix and the reinforcement without reaction product presence. e homogeneous dissemination of reinforcement particles is more essential to enrich the mechanical properties of the AA6082. ese results are in line with the earlier studies by several researchers [16]

Summary

Introduction

A huge number of research studies has shifted from monolithic materials to composite materials to meet the improving universal demand for high performance, ecofriendly corrosion, erosion, and wear-resistant materials. Natarajan et al [13] achieved a dry sliding wear test on an AA6063 composite strengthened with in situ TiB2 content and observed that the inclusion of harder ceramic TiB2 enriches the MTP of the proposed AAMCs. Christy et al [14] carried out their research on aluminum alloy AA6061/TiB2 AMCs, where the TiB2 filler contents were made through the magneto chemistry exothermic reaction of halide powders in the Al melt at 840oC and examined the microstructural and mechanical behavior of the composites. Rajan et al [18] prepared AA7075/TiB2 AAMCs through the magneto chemistry reaction of halide powders to liquefied aluminum and described that the inclusion of filler content in AMCs enriches the wear protection and enhances the tribological characteristics. The present study aims to manufacture the in situ casting method and examine the role of TiB2 particles as well as the weight fraction of tensile strength (UTS), hardness, compression strength (CS), wear rate (WR), and flexural strength (FS) of the composite

Experimental Work

Results and Discussion

Conclusions