The structure of alloys and the phase equilibrium diagram of the Zr-Ru-Ir system

Eremenko, V. N.; Khoruzhaya, V. G.; Shtepa, T. D.

doi:10.1007/bf00843018

Cited by 3 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This value is significantly smaller than the grain sizes obtained by arc melting. For example, Eremenko et al 37 have provided micrographs of the studied alloys with grain sizes of ca. 100 µm.…”

Section: Lattice Parameter (å) Methodsmentioning

confidence: 99%

“…Indeed, it is well known that ZrIr 3 with an AuCu 3type structure has a wide homogeneity region, as evidenced by findings reported by Eremenko et al, 37 but no data on studying the lattice parameter depending on the chemical composition of the intermetallic compound are available in the literature. Meanwhile, the need to quickly determine the chemical composition of the ZrIr 3 intermetallic phase by analyzing the lattice parameter may be of interest for such high-precision areas as microelectronics.…”

Section: Lattice Parameter (å) Methodsmentioning

confidence: 99%

See 1 more Smart Citation

High‐temperature solid‐state reaction between zirconium carbide and iridium: New insights into the phase formation

Nikiforov,

Danilovsky,

Lozanov

et al. 2024

J Am Ceram Soc.

View full text Add to dashboard Cite

The reaction between ZrC and iridium powders was studied in the temperature range of 1000–1600°C. The reaction was stated to start at a temperature as low as 1000°C. The only high‐melting intermetallic phase, ZrIr3, was obtained as a substitutional solid solution ZrIr3±δ. A new analytical approach to relating the composition to the lattice parameter of cubic binary substitutional ZrIr3±δ solid solutions was proposed. This approach is based on comparing the distribution by elemental composition and by lattice parameter in a range of ZrIr3±δ solid solutions. This made it possible to determine the lattice parameter of a stoichiometric ZrIr3 phase, a0 = 3.971(5) Å.

show abstract

Section: Lattice Parameter (å) Methodsmentioning

confidence: 99%

Section: Lattice Parameter (å) Methodsmentioning

confidence: 99%

High‐temperature solid‐state reaction between zirconium carbide and iridium: New insights into the phase formation

Nikiforov,

Danilovsky,

Lozanov

et al. 2024

J Am Ceram Soc.

View full text Add to dashboard Cite

show abstract

Phase equilibria in the solidification range of alloys of the Ti-Ru-Ir system

Eremenko

Khoruzhaya

Shtepa

1987

Powder Metall Met Ceram

View full text Add to dashboard Cite

Interaction of transition metals of group IV with high-melting platinum metals in binary and ternary systems

Khoruzhaya¹

1996

Powder Metall Met Ceram

View full text Add to dashboard Cite

An analysis of the extensive information on the interaction of transition metals of group IV with high-melting platinum metals in binary [1][2][3][4][5][6][7][8][9][10][11] and ternary [12][13][14][15][16][17][18][19][20][21][22][23][24][25] systems accumulated at the Institute of Materials Science of the Academy of Sciences of Ukraine by V. N. Eremenko's school and also data of Western authors [26][27][28] showed that the platinum metals as well as titanium, zirconium, hafnium, which are in the same group of the periodic table, are metallochemically not complete analogs. For instance, upon transition from ruthenium to osmium, rhodium, and, in particular, iridium, the number of compounds forming in binary systems greatly increases. The replacement of titanium by zirconium leads, on the one hand, to an increase of the number of compounds, on the other hand to the appearance of a different crystal structure in compounds with the same stoichiometry ( Fig. 1, Table 1). Yet neither the dimensional factor nor the factor of electron concentration expressed in terms of the sum of (s + d)-electrons per atom is completely determining.Nevertheless a number of regularities were discovered in the structure of the phase diagrams of binary systems formed by transitions metals of group IV and high-melting platinum metals. In all the systems phases with the equiatomic composition AB form. It can be seen from Fig. 1 that they all (except ZrOs) melt congruently and are high-melting compounds. Their melting point is sometimes as high as 2600°C. Such high thermal stability is well correlated with the published data on the high thermodynamic stability of these phases [29, 30]. The crystal lattice of the high-temperature modification of the mentioned phases belongs to the structural type CsCI. In systems with ruthenium and osmium it is stable down to room temperature, in systems with rhodium and iridium a lowering of the temperature entails polymorphic transformation in consequence of the lattice being distorted into a tetragonal one and then into a more complex one, viz., a monoclinic or rhombic one. In all systems with rhodium and iridium there forms a phase with composition AB 3 and with a crystal lattice of type AuCuy A characteristic trait of the phase diagrams under consideration is that there is no trace at all of Laves phases in systems with titanium whereas in systems with zirconium all the platinoids except rhodium form a Laves phase, and in systems with hafnium only osmium does, although the criteria of the formation of Laves phases (the dimensional factor ~md the electron concentration) are favorable in all the systems under consideration. Consequently the mentioned criteria are, as repeatedly pointed out a necessary but not a sufficient condition of the formation of Laves phases.In the range of compositions rich in a transition metal of group IV the number of intermediate phases increases in the series Ti ---Hf--, Zr. In the series of platinoids their number increases from osmium to rhodium and then to iridium; ruthenium, ...

show abstract

The structure of alloys and the phase equilibrium diagram of the Zr-Ru-Ir system

Cited by 3 publications

References 1 publication

High‐temperature solid‐state reaction between zirconium carbide and iridium: New insights into the phase formation

High‐temperature solid‐state reaction between zirconium carbide and iridium: New insights into the phase formation

Phase equilibria in the solidification range of alloys of the Ti-Ru-Ir system

Interaction of transition metals of group IV with high-melting platinum metals in binary and ternary systems

Contact Info

Product

Resources

About