Microstructure and properties of spray cast CuZr alloys

Nanostructural Evolution of Cr-rich Precipitates in a Cu-Cr-Zr Alloy During Heat Treatment Studied by 3 Dimensional Atom Probe

“…It is well known that Zr atoms segregate at grain boundaries and dislocations due to strain field and form Cu 5 Zr. 16,17) In Cu-Cr-Zr systems, one would expect the incoherency between the Cr-rich precipitates and the matrix to increase with growth of the Cr-rich precipitates. If so, Zr and impurities of Si and Fe might segregate on the interfaces between the Cr-rich precipitates and the matrix and then, form an enriched shell on the other side which relaxes the strain induced by the misfit between the BCC Cr-rich precipitates and the FCC matrix.…”

Thermodynamic assessment of the Cu-Ti-Zr system. II. Cu-Zr and Ti-Zr systems

“…In all other studies electron microprobe analysis was used, which fails to provide convincing evidence for either 5:1 or 9:2 ratio of components. The results of [29,30,32] seem to be more convincing. For example, x-ray diffraction was used in [30] for special research of electrolytically-extracted polycrystalline samples of the intermetallic compound and electron diffraction was used in [32] to examine its structure.…”

“…The results of [29,30,32] seem to be more convincing. For example, x-ray diffraction was used in [30] for special research of electrolytically-extracted polycrystalline samples of the intermetallic compound and electron diffraction was used in [32] to examine its structure. Hence, we selected the composition Cu 5 Zr, which strictly corresponds to that of the prototype compound.…”

“…[19,20,22,24,26] suggest that this intermetallide may be of composition Cu 9 Zr 2 (tetragonal long-period superlattice derived from the AuBe 5 -type structure). Review of the experimental procedures used to determine the formulas of this intermetallic compound has revealed that only four of them employ diffraction method: those described in [29,30,32], on the one hand, and in [22], on the other. In all other studies electron microprobe analysis was used, which fails to provide convincing evidence for either 5:1 or 9:2 ratio of components.…”

“…It has been established [12,13,15,25,[29][30][31][32] that this compound is of composition Cu 5 Zr (symmetry group m F 3 4 , [3] Thermal analysis, metallography, microhardness measurements T = 573-1411 K, x Zr = 0-0.28; liquidus of (Cu)-phase, Cu 5 Zr and Cu 51 Zr 14 phases; solubility of Zr in (Cu)-phase [4] Thermal analysis, microhardness measurements T = 773-1173 K, x Zr = 0-0.6; liquidus of (Cu)-phase, liquidus of Cu 5 Zr and Cu 51 Zr 14 [5] Thermal and x-ray analyses, metallography T = 1073-1373 K, x Zr = 0.66-1.0; invariant transformations with CuZr 2 [6] Thermal analysis, metallography T = 873-1253 K, x Zr = 0-1; invariant transformations with Cu 51 Zr 14 , Cu 8 Zr 3 , Cu 10 Zr 7 , CuZr, and CuZr 2 ;…”