ANALYSIS OF RADIATION PROTECTIVE PROPERTIES OF POLYSTYRENE-BASED COMPOSITE MATERIALS

Polystyrene-metal composite materials were manufactured. Composite materials are made of polystyrene, which has been reinforced with highly dispersed powder-like aluminum. Tungsten or steel powder was applied as a radiation shielding additive. The radiation-protective characteristics of composite materials were studied using sources of ionizing radiation 241Am and 152Eu. Calculations of the relative attenuation of the absorbed dose of gamma radiation for protective materials with different mass composition have been performed. A comparison of the protective characteristics obtained experimentally and found by numerical methods is carried out. Hardness values were measured for composites with different component compositions. An increase in hardness with an increase in the amount of a metal component is shown.

Study on Interface Reaction of BN-Al Composite Materials-ChemRxiv.pdf

<p>Ceramic-metal composite materials prepared by the metal infiltration process have become the topic of intense research. The interface reaction between ceramic and metal has an important impact on the mechanical properties of composite materials. This article, for the first time, studies the interface reaction between BN and Al. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were both employed to study interface reaction. Studies have shown that there is an intermediate transition interface between metal and ceramic. The interface reaction between Al and BN produces AlN, and there is no close connection among AlN particles. The grain size of AlN is about 1~2μm. The rate order is: Al element > B element > N element.</p>

Study on Interface Reaction of BN-Al Composite Materials-ChemRxiv.pdf

<p>Ceramic-metal composite materials prepared by the metal infiltration process have become the topic of intense research. The interface reaction between ceramic and metal has an important impact on the mechanical properties of composite materials. This article, for the first time, studies the interface reaction between BN and Al. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were both employed to study interface reaction. Studies have shown that there is an intermediate transition interface between metal and ceramic. The interface reaction between Al and BN produces AlN, and there is no close connection among AlN particles. The grain size of AlN is about 1~2μm. The rate order is: Al element > B element > N element.</p>

METAL COMPOSITE MATERIALS BASED ON TITANIUM ALLOYS, REINFORCED WITH REFRACTORY PARTICLES (review)

Presents a literature review in the field of methods for strengthening titanium and its alloys by introducing various refractory particles into the matrix. The main problematic issues related to the chemical nature of refractory particles and titanium alloys that arise during hardening are briefly described. The main structural, physical and mechanical properties and morphology of such metal composite materials are described. The dependence of the influence of various refractory particles and their amount, as well as the effect of heat treatment on the physical and mechanical properties of microns based on titanium alloys, is presented.

HYBRID METAL MATRIX COMPOSITES BASED ON ALUMINUM ALLOYS (review)

A review of scientific and technical literature in the field of hybrid metal composite materials (MMС) based on aluminum alloys is presented. The most widespread at present matrix aluminum alloys and reinforcing components for the manufacture of hybrid MMCs are considered. The main methods of manufacturing MMCs are shown, as well as the effect of matrix aluminum alloys and reinforcing components on the mechanical, thermophysical and tribological properties of hybrid MMCs. A comparison of the characteristics of hybrid MCMs with matrix alloys and MCMs of similar systems is given.