The present position of the solution theory of carburised iron, Journal of the Iron and Steel Institute, Vol.II (1900), pp.333-352,Correspondence part.
Notes:
In his correspondence to Stansfield, Von Juptner makes the following remarks:
"In the case of sufficiently quick cooling, the solidification-point B will be moved to B1, by which the position and constitution of the eutectic point must also be moved."
"If the cooling is gradually continued till everything has solidified, the solid mass consists of a mixture of mixed crystals having the composition a and of graphite, and by further continued and more gradual cooling the separation of graphite takes place along the line aS1."
"Should, however, the complete solidification have been lowered by quick cooling to the line E1F1, the result of this procedure will probably be (at least in the case of not more than about 5 per cent of carbon) not a mixture of mixed crystals having the composition a together with graphite, but a conglomerate of mixed crystals having the composition E1 together with cementite. On further (quicker) cooling, no graphite separates, but only cementite (along the line E1mS)."
With these ideas, the basis for the Iron carbon double diagram had been proposed.
