Abstract
In work studies of materials obtained from various powder mixtures Al-Mg-B after mechanical processing in a planetary mill and subsequent vacuum sintering were carry out. It was found that for each mixture exists optimal time of mechanical treatment in a planetary mill, at which the maximum content of AlMgB14-phase is reached. It was shown that for the samples synthesized from the Al-Mg-B powder mixture with the dispersion of the raw aluminium powder <d>~80 μm after 5 hours of mechanical activation and subsequent vacuum sintering at a temperature of 1130 °C, the maximum phase of AlMgB14 is ~ 85-90 wt.%.
Highlights
The constant development of technology and industry necessitates the introduction of new materials, having high physical and mechanical properties
One of the most promising materials in this category is material based on ternary compound of aluminium, magnesium and boron – AlMgB14 due to high hardness, reaching 46 GPa with addition of TiB2, friction coefficient, reaching of amount ~ 0.02 [2-3] and coefficient of thermal expansion (CTE) ~ 9(10-6) K-1, which is close to the coefficient of thermal expansion of steels ~ 11(10-6) K-1 [4-5]
The regularities of forming phase composition of materials based on AlMgB14 were studied
Summary
The constant development of technology and industry necessitates the introduction of new materials, having high physical and mechanical properties. The main problem of obtaining the materials based on AlMgB14 is contamination with impurity phases, associated with the oxidation of the raw powders of aluminum, magnesium and boron. Despite this problem, there is insufficient information in the literature on the effect of the dispersion of the raw aluminum, magnesium, and boron powders on the phase composition of products obtained from these powders [14-16]. The purpose of this work is to study the phase composition of materials obtained from various powder mixtures Al-Mg-B after mechanical activation and subsequent vacuum sintering
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