Metal matrix compositions for neutron shielding applications

Details Metal matrix compositions for neutron shielding applications Metal matrix compositions for neutron shielding applications

G - Physics

21

F

G21F 1/08 (2006.01) C22C 32/00 (2006.01)

Patent

CA 2259448

A neutron shield is formed of a boron carbide-metal matrix composite having a density ranging from 2.5 to 2.8 g/cm3 and a composition ranging from approximately 10 to 60 weight % of boron carbide and 40 to 90 weight% of metal matrix. The metal matrix is aluminum, magnesium, titanium, or gadolinium or one of their alloys. The boron carbide includes one or more metal elements added to improved the chelating properties of the metal matrix material by forming intermetallic bonds with the metal matrix material. The metal additives are present in the composite in an amount less than approximately 6 % by weight. The shield may be in container or plate form.

Un blindage antineutrons est constitué d'un composite de carbure de bore-matrice métallique dont la densité est comprise entre 2,5 et 2,8 g/cm<3>, et d'une composition contenant approximativement 10 à 60 pourcent en poids de carbure de bore et 40 à 90 en poids de matrice métallique. La matrice métallique est constituée d'aluminium, de magnésium, de titane et de gadolinium ou d'un de leurs alliages. Le carbure de bore comprend un ou plusieurs éléments métalliques ajoutés afin d'améliorer les propriétés de chélation du matériau matriciel métallique par formation de liaisons intermétalliques avec le matériau matriciel métallique. Les additifs métalliques représentent, dans le composite, une quantité inférieure à approximativement 6 pourcent en poids. Le blindage peut se présenter sous forme de conteneur ou de plaque.

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