CaO x Al2O3 Slag

Name: CaO x Al2O3 Slag
Diagram No.: 1135
Type of diagram: CCT
Chemical composition in weight %: See the table
Group: Slag
Note: CCT diagram for the CA slag, obtained from SHTT. The red triangles mean the point of first crystals precipitation (crystallisation temperature) for the slag of the present work (44% CaO, 56% Al2O3). Samples A, B and C are calcium aluminate slags containing 48% CaO, 50% CaO and 53% CaO respectively, whose CCT diagrams were also determined through the hot thermocouple technique in a previous work [36].
It was constructed a CCT diagram for the CA slag; see Figure. The samples were maintained at 1700 C for 60 seconds before the cooling at different cooling rates. The red triangles mean the point of first crystals precipitation for the CA slag. The crystallisation starts far from the liquidus. It can be observed that the crystallisation temperature is a function of the cooling rate; the critical cooling rate for the slag is 1700 C/min, i.e. with higher cooling rates no crystal is observed. For the lower cooling rates in a few seconds the sample is 100% crystalline (after the beginning of crystallisation).
Additional links: No. 1135, No. 1136, No. 1137, No. 1139, No. 1140
Reference: Not shown in this demo version.

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