CaO x SiO2 x TiO2 Slag

Name: CaO x SiO2 x TiO2 Slag
Diagram No.: 1136
Type of diagram: TTT
Chemical composition in weight %: See the table
Group: Slag
Note: TTT diagram for the slag CST_2 35.6% CaO, 46.3% SiO2, 18.1% TiO2 (wt%), obtained from SHTT. For each temperature six measurements were done. The averages and standard deviations are shown.
CCT diagram: Some continuous cooling rates were applied using the SHTT 60, 30, 20 and 10 C/min. No crystal was observed.
TTT diagram: The TTT diagram for the slag CST_2 was constructed; see Figure. It can be observed that the crystallisation starts far below the liquidus. For each temperature six measurements were done, i.e. the diagram was constructed from 102 measurements. The averages and standard deviations were calculated assuming a normal distribution, and they are shown in Figure. The experiments were executed considering the maximum holding time of 1000 s. Different ways of crystallisation were observed. In the range 940 C - 1030 C crystallisation always occurred on the surface of the thermocouple advancing to the bulk of the sample. The surface of the thermocouple most likely facilitates heterogeneous nucleation. In the range 1040 C - 1070 C crystallisation occurred in two different forms: (i) from the surface of the thermocouple advancing to the bulk of the sample and (ii) in the bulk of the sample in an relatively intense way. In the range 1080 C - 1100 C crystallisation occurred (i) also from the surface of the thermocouple advancing to the bulk of the sample and (ii) in the bulk of the sample, but not in an intense way, since it were observed small blocks of crystals growing very slowly.
Additional links: No. 1135, No. 1136, No. 1137, No. 1139, No. 1140
Reference: Not shown in this demo version.

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