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By Emmy Landmann; Kurt Böttcher

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Fig. 1. B-Eu. Phase diagram B-Eu assessed by [97 Lia] Fig. 2. B-Eu. : J. Less-Common Met. : J. Alloys Comp. 1007/978-3-540-44756-6_11 # Springer-Verlag Berlin Heidelberg 2012 B - Fe (Boron - Iron) 1 B - Fe (Boron - Iron) Phase diagram The results obtained for the system B-Fe (in connection with permanent magnetic alloys) present in the literature have been discussed thoroughly by [02 Gur]. In such systems several phases are neighboring to each other. So the formation of galvanic cells is possible and elements for corrosion will occur.

B-C. 5 up to 20 atom-% C. At temperatures < 2000 K occouring compounds may be stable. It should be pointed out, that impurities may have a significant influence on the stability of phases and on the solubility. Crystal structure Structure of intermediate phases and their lattice parameters are given in Table 1. Table 1. B-C. 5093 [68 Amb] [86 Mor] [75 Yak] [75 Wil] As has been mentioned in [Landolt-Börnstein] the structure and the stoichiometry of boron carbides depend on the methods of preparation.

Phase Equil. : J. Phase Equil. 1007/978-3-540-44756-6_4 # Springer-Verlag Berlin Heidelberg 2012 B - C (Boron - Carbon) 1 B - C (Boron - Carbon) Phase diagram Kasper et al. [94 Kas] have performed modelling in this system. The diagram in Fig. 1 is the result of thermodynamic calculations by [92 Mas]. It is very similar to the calculated phase diagram in [LandoltBörnstein]. Fig. 1. B-C. 5 up to 20 atom-% C. At temperatures < 2000 K occouring compounds may be stable. It should be pointed out, that impurities may have a significant influence on the stability of phases and on the solubility.

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ABC im Walde by Emmy Landmann; Kurt Böttcher


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