Kunihiko Nakashima1, Tetsuya Miyazaki2, Takeshi Takaki3 and Kenji Morinaga1
1Graduate School of Engineering Science, Department of Materiales Science and Technology, Kyusyu University, Fukuoka
Equilibrium state phase diagrams in the MO-TeO2(M: Pb, Cd) systems were determined by DTA analysis and X-ray diffraction. To understand various phenomena including the glassy state, crystallyzation and precipitation of metastable phases which occur in glass-forming systems, T.T.T. (Time-Temperature-Transformation) and C.C.T. (Continuous-Cooling-Transformation) curves containing a time axis were determined by the hot-thermocouple method. Moreover the cooling rate and composition diagrams were made on the basis of the C.C.T. curves.
These diagrams are preferable to understand the above-mentioned phenomena, and to design materials by rapid cooling in glass-forming systems.
glass-forming system, PbO-TeO2 system, CdO-TeO2 system, time-temperature-transformation diagram, continuous-cooling-transformation diagram, cooling rate-composition diagram
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