- Email: [email protected]
Errata to vol. 75
Journal of the Less-Common Metals, 77 f1981) 298
298
Errata to Vol. 75
G. H. Rinehart and R. G. Behrens, Vapor pressure and vaporization th~odyn~ics of scandium trifluoride, J. Less-Common Met., 75 (1980) 65 - 78. On p. 74 in Table 3 the heading for the third column should read as follows: H”(T) -H”(298.15
KJ (kcal mol-l).
T. E. Pedersen and J. II. Verhoeven, The yttrium-rich side of the yttrium-niobium-titanium system, J. Less-Common Met., 75 (1980) 79 - 84. On p. 80 the third paragraph of Section 2 should read as follows: Because of the very high reactivity of molten yttrium and titanium metal, the zone refining was carried out using the vertical floating zone method. The molten zone was produced using electron beam heating and the chamber was maintained at an initial vacuum level of 2 X lo-’ Torr with a liquid-nitrogen-trapped diffusion-pumped system. A zone pass consisted of establishing a molten zone at the interface between the two 5 mm diameter rods placed end to end and then running it vertically upward at a predetermined rate. All of the experiments used to determine the equilibrium compositions were performed at a solidification rate of 1 pm s-l with a travel length of at least 2 cm. A typical zone had a length of 5 mm and required an electron embedment power of 75 W to maintain it during solid~ication. Both the melting and freezing interfaces were observed to be slightly convex toward the zone. The control circuits on the drive motor and heating system were adequate to maintain steady state conditions sufficiently constant so that only a small amount of banding was observed in the solidified eutectic.
298
Errata to Vol. 75
G. H. Rinehart and R. G. Behrens, Vapor pressure and vaporization th~odyn~ics of scandium trifluoride, J. Less-Common Met., 75 (1980) 65 - 78. On p. 74 in Table 3 the heading for the third column should read as follows: H”(T) -H”(298.15
KJ (kcal mol-l).
T. E. Pedersen and J. II. Verhoeven, The yttrium-rich side of the yttrium-niobium-titanium system, J. Less-Common Met., 75 (1980) 79 - 84. On p. 80 the third paragraph of Section 2 should read as follows: Because of the very high reactivity of molten yttrium and titanium metal, the zone refining was carried out using the vertical floating zone method. The molten zone was produced using electron beam heating and the chamber was maintained at an initial vacuum level of 2 X lo-’ Torr with a liquid-nitrogen-trapped diffusion-pumped system. A zone pass consisted of establishing a molten zone at the interface between the two 5 mm diameter rods placed end to end and then running it vertically upward at a predetermined rate. All of the experiments used to determine the equilibrium compositions were performed at a solidification rate of 1 pm s-l with a travel length of at least 2 cm. A typical zone had a length of 5 mm and required an electron embedment power of 75 W to maintain it during solid~ication. Both the melting and freezing interfaces were observed to be slightly convex toward the zone. The control circuits on the drive motor and heating system were adequate to maintain steady state conditions sufficiently constant so that only a small amount of banding was observed in the solidified eutectic.