Preparation and properties of composite material based on hafnium diboride and aluminum

S A Belyakovich,A V Mostovshchikov,F A Gubarev,A P Ilyin

doi:10.1088/1757-899x/1019/1/012015

Abstract

Hafnium diboride (HfB2) in aluminum matrix (Al) material was prepared by diffusion sintering of a mixture of hafnium diboride and aluminum micropowders. The effect of the hafnium diboride content (HfB2) in the aluminum matrix (Al) on sintering characteristics and properties of the samples is presented. The effect of microwave activation of the aluminum powders has been established. The diffusion sintering behavior was concluded. The material properties and structure were defined.

Highlights

Due to the nuclear industry development the new materials design process is a crucial task to protect against ionizing radiation and neutrons [1]
Hafnium diboride physicochemical and radiation properties are well–studied, it is known that it has high strength covalent bonding and low self-diffusion coefficient which indicates the need for high temperatures and pressure to create a strong non-porous structure
Taking into consideration the known features of sintering ceramic materials with aluminum, leading to low-strength crack-sensitive systems it was decided to create a system based on microwave radiation activated aluminum micropowder

Summary

Introduction

Due to the nuclear industry development the new materials design process is a crucial task to protect against ionizing radiation and neutrons [1]. New materials that can absorb or scatter ionizing radiation, at the same time having a low density and mass-dimensional characteristics of the final products are needed to be design. Hafnium diboride physicochemical and radiation properties are well–studied, it is known that it has high strength covalent bonding and low self-diffusion coefficient which indicates the need for high temperatures and pressure to create a strong non-porous structure. Taking into consideration the known features of sintering ceramic materials with aluminum, leading to low-strength crack-sensitive systems (different thermal expansion coefficients of metals and ceramics, thermal stresses at the metalceramic interface) it was decided to create a system based on microwave radiation activated aluminum micropowder.

Objectives

Results

Conclusion