Structure and Properties of Tantalum Coatings Obtained by Electron Beam Technology on Aluminum Substrates

Khatia Ananiashvili,Natalia Valko,Mikheil Okrosashvili,Tamar Loladze,Tomasz N Koltunowicz

doi:10.3390/app10113737

Abstract

The paper deals with the study of the structure and properties of tantalum coatings formed by electron beam evaporation and deposition of tantalum powder on 300–450 °C aluminum substrate. The research results of surface morphology, phase and elemental composition show that high activity of an aluminum substrate and specific conditions for vapor-phase technology promote formation of tantalum coatings characterized by a high degree of crystalline grains, with high adhesion and hardness despite the surface cracks. It was observed that the optimum deposition temperature of tantalum on aluminum substrates varies from 300 °C to 350 °C. These coatings demonstrate excellent physical and mechanical properties due to formation of intermetallic phases in the reactive zone.

Highlights

Technological advances, in particular, the development of rocket and space technology, nuclear energy, heat power engineering, microelectronics, aviation, mechanical engineering and medicine highlight the necessity for new materials and technologies or modification of known ones.The surface of parts in modern machines, airplanes or engines is under the heaviest load, since it is affected by the working environment and contacting machine parts at an early operation stage.improvement of the product reliability and its surface parameters is a very acute issue.Applying special coatings on the surface of different products is one of the common processing methods, while the composition, structure and properties of the coatings may differ from the base metal.Various coating methods are used in industry currently
The goal of the paper is to study the phase and elemental compositions, microhardness, and morphology of tantalum coatings on an aluminum gradient substrate obtained by electron beam technology at
SEMsamples images have of surface morphology and cross-sections the tantalum coatings deposited at the

Summary

Introduction

In particular, the development of rocket and space technology, nuclear energy, heat power engineering, microelectronics, aviation, mechanical engineering and medicine highlight the necessity for new materials and technologies or modification of known ones.The surface of parts in modern machines, airplanes or engines is under the heaviest load, since it is affected by the working environment and contacting machine parts at an early operation stage.improvement of the product reliability and its surface parameters is a very acute issue.Applying special coatings on the surface of different products is one of the common processing methods, while the composition, structure and properties of the coatings may differ from the base metal.Various coating methods are used in industry currently. Improvement of the product reliability and its surface parameters is a very acute issue. Applying special coatings on the surface of different products is one of the common processing methods, while the composition, structure and properties of the coatings may differ from the base metal. Various coating methods are used in industry currently. Scientific and technical experience of dealing with concentrated flows has shown that the electron beam is the most effective source of energy for external material processing [1,2]. It has the highest energy and absorption coefficient

Objectives

Results

Conclusion