The effects of oxygen on the mechanical properties and the lattice strain of commercial pure CP) Ti and Ti-6Al-4V alloys are discussed here in terms of the Vickers hardness, tensile strength and elongation. The Vickers hardness and tensile strength of the CP Ti and the Ti-6Al-4V alloys increased with an increase in the oxygen concentration. On the other hand, the elongation of the CP Ti decreased considerably as the oxygen concentration increased, while that of the Ti-6Al-4V alloys gradually decreased as the oxygen concentration increased. Thus, the oxygen concentration has a greater effect on the mechanical properties of CP Ti compared to its effects on the Ti-6Al-4V alloy. This can be explained in terms of the difference in the solid solution effect of oxygen between the CP Ti and the Ti-6Al-4V alloy. Where, the mechanical properties of Ti-6Al-4V alloy were previously affected by an earlier lattice expansion caused by an increment in the c/a ratio of the Ti-6Al-4V during the Al and V alloying process.

The magnetization behaviors have been measured for amorphous Fe 90−x Mn x Zr 10 ͑x = 8 and 10͒ alloys. The Curie temperature is decreased from 210 K to 185 K with increasing Mn concentration ͑x =8 to x =10͒. The magnetization measurements were conducted at temperatures above the Curie temperature in the paramagnetic region. In both samples, the magnetic properties showed superparamagnetic behavior above T c where the mean magnetic moment of the superparamagnetic spin clusters decreased with increasing temperature. A large magnetic entropy change ⌬S M , which is calculated from H vs M curves associated with the ferromagnetic-paramagnetic transitions in amorphous, has been observed. The maximum ⌬S M of Fe 82 Mn 8 Zr 10 is 2.87 J / kg K at 210 K for an applied field of 5 T. The peak of magnetic entropy change was observed at the Curie temperature. The ⌬S M decreases with increasing Mn concentration to 2.33 J / kg K.

The emission from KCI:Sb 3 + and KI:Sb 3 + excited in the A-absorption band was measured as a function of exciting photon energy and temperature. The A-band excitation produced two emission bands for KCI:Sb 3 + and a single band for KI:Sb 3 + . The definitive assignment of these bands is presented in terms of the adiabatic potential energy surface (APES), in which the effect of the spin-orbit interaction (SO) on the Jahn-Teller (JT) interaction coupling to the Eg mode is taken into account. The polarization spectrum and the angular dependence of polarization ratio of the A -band emission were also studied to determine the symmetry axes of the Sb 3 + -vacancies complex. The results indicate that the anisotropy is associated with the relaxed excited state (RES) ofSb 3 + . It is also found that the JT interaction coupling to the T 2g mode and the vacancies, situated in the next-nearest-neighbor (nnn) and the nearestneighbor (nn) positions to the Sb 3 + ion, give rise to an additive perturbation.

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