High-strength beryllium-free moulded body made from...

Details High-strength beryllium-free moulded body made from... High-strength beryllium-free moulded body made from...

C - Chemistry, Metallurgy

22

C

C22C 45/10 (2006.01) C22C 16/00 (2006.01)

Patent

CA 2458516

The invention relates to high-strength, beryllium-free moulded bodies made from zirconium alloys which may be plastically deformed. Said moulded bodies are characterised in comprising a material, essentially corresponding to the following formula in composition: Zra (E1)b (E2)c (E3)d (E4)e, where E1 = one or several of Nb, Ta, Mo, Cr, W, Ti, V, Hf and Y, E2 = one or several of Cu, Au, Ag, Pd and Pt, E3 = one or several of Ni, Co, Fe, Zn and Mn, E4 = one or several of Al, Ga, Si, P, C, B, Sn, Pb and Sb, a = 100-(b+c+d+e), b = 5 to 15, c = 5 to 15, d = 0 to 15 and e = 5 to 15 (a, b, c, d, e in atom %). The moulded body essentially comprises a homogeneous, microstructural structure, which is a glass-like or nano-crystalline matrix with a ductile, dendritic, cubic body-centred phase embedded therein.

L'invention vise à mettre au point des corps moulés très rigides en alliages de zirconium et plastiquement déformables, exempts de béryllium. Lesdits corps moulés se caractérisent en ce qu'ils consistent en un matériau correspondant, dans sa composition, sensiblement à la formule Zra (E1)b (E2)c (E3)d (E4)e, dans laquelle E1 comprend un ou plusieurs éléments du groupe Nb, Ta, Mo, Cr, W, Ti, V, Hf et Y, E2 comprend un ou plusieurs éléments du groupe Cu, Au, Ag, Pd et Pt, E3 comprend un ou plusieurs éléments du groupe Ni, Co, Fe, Zn et Mn et E4 comprend un ou plusieurs éléments du groupe Al, Ga, Si, P, C, B, Sn, Pb et Sb, avec a = 100-(b+c+d+e), b = entre 5 et 15, c = entre 5 et 15, d = entre 0 et 15, e = entre 5 et 15 (a, b, c, d, e étant exprimés en % en atome). Lesdits corps moulés présentent essentiellement une structure microstructurelle homogène consistant en une matrice vitreuse ou nanocristalline avec une phase ductile, dendritique, centrée de manière cubique dans l'espace, incorporée dedans.

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