Supercooled liquid region

Examination of Fig. 1 shows that the behavior of k(7) displays remarkably similar features for the tree substances it increases in the normal liquid with decreasing temperature and has a distinct maximum near T. Further lowering temperature leads to a decrease of k(7) in the supercooled liquid region and passes through a broad minimum which roughly matches the region of the glass - supercooled liquid transformation. Such a minimum in k(7) is thus a truly anomalous feature exhibited by these materials. Once within... 

Kawamura, Y., Shibata, T., Inoue, A., and Matsumoto, T. (1996) Deformation behavior of ZrssAlioNiioCujs glassy alloy with wide supercooled liquid region, Appl. Phys. Lett., 69, 1208-1210. 

Table 1. Comparison of the transformation temperatures determined from DSC at heating rate is at 0.67 K/ s (if not indicated) for some typical amorphous alloys prepared by different methods. Tg glass transition temperature Txi onset crystallization temperature AT the width of supercooled liquid region, which is equal to Tx - Tg.

Net-shape (micro-)forming in supercooled liquid region... 

Thermal stability 105 alloys in supercooled liquid region 166... 

The temperature interval of the supercooled liquid for the extruded bulk measured at a heating rate of 0.67 K/s is 28 K. The increase in by 55 K is expected to cause the extension of the supercooled liquid region. As a method of detecting the glass transition temperature (Tg), we utilized the drastic decrease in flow stress in the vicinity of Tg. As shown in fig. 93, a compressive stress of 300 MPa was applied to the sample and... 

The change of the specific heat of the transition from amorphous solid to supereooled liquid as well as the temperature dependence of the specific heat in the amorphous solid and supercooled liquid has been examined for the La-Al-Ni amorphous alloys through detailed differential scanning calorimetric measurements (Inoue et al. 1989f). As an example, fig. 115 shows the thermograms of the amorphous La5sAl25Ni2o alloy with the widest supercooled liquid region. The Cp value of the as-quenched phase is 24 J/mol K... 

The atomic sizes of the constituent elements in the ternary R-Al-M amorphous alloys differ significantly. Therefore, the interpretation of the total radial distribution function (RDf) obtained by the ordinary X-ray diffraction method is complicated, and it is extremely hard to obtain structural parameters for each independent pair of elements. By using the anomalous X-ray scattering (AXS) method with which the structural environment around a particular constituent element can be determined, it is expected that this difference is observed and the structural environment around Ni in the amorphous La55Al25Ni2o alloy is estimated in as-quenched, annealed (in the supercooled liquid region) and crystallized states. From these systematic AXS measurements, the structural changes due to crystallization were discussed. 

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