Erratum to: Hf-Pd (Hafnium-Palladium)

Addenda Addenda Editor's Note: Whereas the JPE editorial and production staff make every effort to preserve the integrity of each author's work, the occasional error occurs. In Vol. 16, No. 3, p.284-287 of the Supplemental Literature Review "Hf-Pd (Hafnium-Palladium)," "Ir-Sc (Iridium-Scandium)," and Pt-Si (Platinum-Silicon), the diagrams were incorrectly placed due to a printer error. The full text and correct diagrams are printed below. Hf-Pd (Hafnium-Palladium) H. O k a m o t o The Hf-Pd phase diagram in [Massalski2] was redrawn from [72Shu]. Five compounds were reported: Hf2Pd, HfPd, and HfPd3, which form peritectically at 1415, 1610, and 1965 ~ respectively; Hf3Pd4, which forms peritectoidally at 1560 ~ and HfPd 2, which forms congruently at 2075 ~ and decomposes eutectoidally at 1370 ~ [94Oka] questioned the slope of the ([~Hf)/(~Hf) + (aHf) phase boundary and the liquidus and solidus trends of (Pd) in the HfPd phase diagram in [Massalski2]. In addition, the schematic configuration shown in Fig. 1 inevitably induces an unlikely asymmetric liquidus (see [93Oka]) for HfPd 3 if the other part of the Hf-Pd diagram in [Massalski2] is assumed to be correct. Apparently, the entire phase diagram should be reinvestigated. This configuration was questioned by [94Sel] on the basis of enthalpy of formation measurements of the five compounds and an x-ray diffraction analysis of an alloy containing 75 at.% Pd, The reactions observed by [94Sel] indicated that HfPd 2 forms peritectically while HfPd 3 forms congruently. A possible shape of the phase diagram in the range of 40 to 75 at.% Pd was illustrated by [94Sel] (Fig. 1). The temperature scale is unknown. Furthermore, the enthalpy of formation values observed [94Sel] indicated that Hf3Pd4 and HfPd, instead of HfPd 2, may be unstable at low temperatures . . . . l l l i . I . . . . . . . . . I . . . i r .... I . . . . . . . . . I, Cited References 72Shu: A.K. Shurin and V.V. Pet'kov, Russ, Metall, (2), 122-144 (1972). 93Oka: H. Okamoto and T.B. Massalski, J. Phase Equilibria, 14(3), 316-335 (1993). 94Oka: H. Okamoto and T.B. Massalski, J. Phase Equilibria, 15(5), 500-521 (1994). 94Seh N. Selhaour, J.C. Gachon, and J. Hertz, J. Alloy. Compd., 204, 157-164(1994). . . . . . . . . I . . . . . . . . . I . . . . . . . . . I . . . . . . . . . I . . . . . . . . . I . . . . . . . . . ff . 40 50 . . . . . . . . i . . . . . . 60 . . . i 70 80 Atomic Percent Palladium Fig. 1 Hf-Pd phase diagram. Journal of Phase Equilibria Vol. 18 No. 2 1997 223  (...truncated)