An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Ti-50.9Ni (at%) shape memory alloy (SMA) ingot was prepared by the vacuum induction furnace, and was produced into Φ2.0 mm wire successively by forging, rolling and hot drawing. After complete annealing of 800 °C×5 min and cold drawing with 30% deformation, on-line annealing with different temperatures (500 °C×5 min, 600 °C×5 min, 700 °C×5 min) were employed to TiNi wires. Both tensile tests and fivecycles loading-unloading tensile tests with 7% strain were applied to study the mechanical properties, and superelasticity (SE) of TiNi wires. In addition, microstructure and fracture characteristics were investigated by OM, SEM and EDS. The results showed that the tensile strength of 500 °C×5 min annealing reached 1431 MPa, the elongation of 700 °C×5 min annealing reached 129%. The superelasticity behavior of 500 °C×5 min showed excellent performance in five-cycles loading-unloading tensile tests, and the transformation platform peak stress with >7% strain showed a small attenuation (about 4 MPa ), and cumulative residual strain was only 0.2%. In addition, fracture characteristics for all TiNi wires were all plastic fractures, there were a large number of dimples in fractures.
The microstructure and mechanical properties of purity aluminum refined with salt containing Ti and B elements have been studied in detail with Optical Microscope and MTS (Mechanical Testing and Simulation). The salt containing weight ratio of 22.2Ti : 1B has the most refining effect on the purity aluminum with the finest structure and the best mechanical properties, meanwhile it also possesses the advantages of short reacting time (within 5 minutes) and long fading time (more than 20 hours). The refining effect of the salt increases with the content of Ti and B in the melting and the refining mechanism is mainly contributed to the heterogeneous nuclei of more fine TiAl3 particles dispersed in the melting, which come from the reaction between the salt and aluminum. Purity B contained salt has little or no directly refining effect, However, B contained salt has indirect refining effect on the purity aluminum when it is added simultaneously with Ti contained salt, this may be due to that the dispersive and fine boride (TiB2) could be taken as the heterogeneous nuclei for TiAl3 particle, and then prevents the coarsening of the TiAl3 particle.
Nine Cu(I)-cyanide metal–organic frameworks (MOFs), namely, [Cu4(CN)2(4-bpt)2]n (1), {[Cu3(CN)2(4-bpt)]·H2O}n (2), [Cu2(CN)(3-bpt)]n (3), [Cu2(CN)2(3-Hptz)]n (4), [Cu3(CN)2(3-ptz)]n (5), [Cu7(CN)7(3-tpt)2]n (6), {[Cu9(CN)9(btb)2]·btb}n (7), [Cu2(CN)2(4-azpy)]n (8), and [Cu3(CN)3(bpp)]n (9) (4/3-Hbpt = 3,5-bis(4/3-pyridyl)-1,2,4-triazole; 3-Hptz = 3-pyridyl-tetrazole; 3-tpt = 2,4,6-tris(3-pyridyl)-1,3,5-triazine; btb = 1,4-bis(1,2,4-triazol-4-yl)benzene; 4-azpy = 4,4′-azobispyridine; bpp = 1,3-bis(4-pyridyl)propane), were synthesized under hydrothermal conditions and structurally characterized. The 4-bpt, 3-bpt, and 3-Hptz ligands in 1–4 were in situ generated by cycloaddition reactions. Their structural features vary from two-dimensional (2D) (3), three-dimensional (3D) (4, 5, 6), 3D 2-fold interpenetration (1, 2, 8), to 3D 3-fold interpenetration (7, 9). Complex 1 is an intriguing 3D metal–organic framework (MOF) with a nanosized rectangular channel. Complex 3 exhibits a chiral 2D double-layered network prepared by achiral component. Complex 6 is a 3D MOF constructed from six μ2-cyanides, a μ3-cyanide, and a μ3-tpt ligand. Complex 7 shows an interesting 3D MOF with (3.4)-connected 5-nodal net, containing a btb guest molecule in the rectangular channel. Complex 8 is a 3D MOF assembled by a 2D [Cu2(CN)2]n network pillared by a 4-azpy spacer. Complex 9 is a 3D MOF with ths topology. Their structural diversity originates from the variation of Cu(I) coordination numbers and three types of cyanide-bridging modes, tuned via various bidentate (4-azpy, bpp), tridentate (3-Hptz, 3-tpt), and tetradentate (4-bpt, 3-bpt, 3-ptz, btb) N-heterocyclic ligands. Infrared spectra and cyanide coordination modes are discussed in detail. The characteristic ν(C≡N) stretching frequencies in μ2-CN complexes show linear correlation with the Cu–CN bond distances. A decrease of about 6.7 cm–1 in ν(C≡N) corresponds to a 0.01 Å elongation of the Cu–CN bond. These Cu(I) complexes exhibit good thermally stability and emit strong luminescence at 386–593 nm.
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