Zirconium intermetallics

Intermetallic compounds of zirconium with kon, cobalt, and manganese absorb and desorb considerable amounts of hydrogen, up to ZrMri2 [68417-38-9] (128) and ZrV2H 2 [63440-37-9] (129). These and other zirconium intermetallic compounds are being extensively studied for possible hydrogen storage appHcations (130). 

Titanium and zirconium intermetallics. Various metals of practical relevance (Ti, and also Nb, Fe, Ni) form several fields of solid solutions with aluminium in presence, often, of rather complex phase equilibria. Several investigations and re-examinations of such systems, performed in the course of time, have been reviewed and assessed during the European Congress EUROMAT 2005... 

The numerous intermetallic compounds of zirconium, from ZrAl to ZrZn, are reviewed in References 120—123. 

Individually indexed alloys or intermetallic compounds are Aluminium amalgam, 0051 Aluminium-copper-zinc alloy, 0050 Aluminium-lanthanum-nickel alloy, 0080 Aluminium-lithium alloy, 0052 Aluminium-magnesium alloy, 0053 Aluminium-nickel alloys, 0055 Aluminium-titanium alloys, 0056 Copper-zinc alloys, 4268 Ferromanganese, 4389 Ferrotitanium, 4391 Lanthanum-nickel alloy, 4678 Lead-tin alloys, 4883 Lead-zirconium alloys, 4884 Lithium-magnesium alloy, 4681 Lithium-tin alloys, 4682 Plutonium bismuthide, 0231 Potassium antimonide, 4673 Potassium-sodium alloy, 4646 Silicon-zirconium alloys, 4910... 

A. Pebler, E.A. Gulbransen, Thermochemical and structural aspects of the reaction of hydrogen with alloys and intermetallic compounds of zirconium, Electrochem. Techn. 4 (1966) 211-215. 

Note that even in those cases where multiple compound layers were present at the A-B interface, two layers were dominating. For example, G. Hillmann and W. Hofmann and O. Taguchi et al. observed the formation of all six intermetallics shown on the equilibrium phase diagram in the reaction zone between zirconium and copper, with two Cu-rich compounds occupying more than 90 % of the total layer thickness and layer-growth kinetics deviating from a parabolic law. When investigating... 

Bulanova M., Tretyachenko L., Mileshevich K. et al. (2002) Joint influence of zirconium and silicon on the structure and properties of Ti and Ti-Al alloys. In Coll. Abstracts of the VIII Int. Conf. on Crystal Chemistry of Intermetallic Compounds, Lviv, Ukraine, p. 40. 

In the anode reaction, charge takes place from left to right and discharge occurs in the opposite direction. The metal is an intermetallic AB5-type compound. Some variation occurs in that a rare-earth mixture (typically cerium or lanthanum) is compounded with nickel, manganese, cobalt, or aluminum (for the B portion). Titanium and vanadium can also be used in AB2 intermetallic compounds with nickel, zirconium cobalt, or chromium (as the B portion), but they are rarely used due to performance issues. 

Superconducting materials can be divided into two general categories—brittle and ductile. The brittle superconductors consist of the intermetallic compounds such as columbium-tin (CbaSn) and vanadium-gallium (VsGa). The ductile superconductors consist of most of the elemental metals as well as alloys such as niobium-zirconium. 

At the present state of the art, most interest centers around the intermetallic compounds and alloys w hich have a combination of high critical temperature and high critical field. From a practical standpoint, the alloys, notably niobium-zirconium, are of more interest to end users and designers because the brittle materials present a greater number of manufacturing and fabrication problems. 

Let us consider the formation of intermetallic compounds for zirconium. Table 13.2 and Table 13.3 show the melting temperatures of binary phases of the 4d series elements. 

The major alloying elements are manganese, aluminium, zinc, zirconium, silicon, thorium, and rare earth metals (E). At present E elements are the most promising candidates for magnesium alloys, with high temperature stability as well as improved corrosion behavior. E metals are forming stable intermetallic compounds at high temperature and therefore they decrease casta-bility. Aluminium and zinc are introduced mainly to... 

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