Materials Transactions, Vol.51 No.01 (2010) pp.196b-196b
© 2010 The Japan Institute of Metals

Editor's Announcement

The following is the explanation of the above Erratum given by the authors.

 Papers 1¹⁾ and 2²⁾ report that, using a newly developed suction-casting method with cylinder-type piston for rapid quenching, Zr₅₅Al₁₀Ni₅Cu₃₀ bulk glassy alloy rods with a diameter of 16mm and 30 mm, respectively, were successfully produced, while they also report the thermal stability and mechanical properties of those specimens.

 The single most important point of these two papers is the successful production of Zr₅₅Al₁₀Ni₅Cu₃₀ bulk glassy alloy rods with a diameter of 16mm and 30mm and the length larger than the diameter. The weight of the bulk glassy alloy rods was not of primary importance in these papers.

 Because of the Cu hearth capacity limitation (30g for Fe), each master alloy button in the case of the Zr₅₅Al₁₀Ni₅Cu₃₀ study was limited up to ~26 g. We used three to four buttons in the case of Paper 1 and eight to nine in the case of Paper 2. The weight fluctuation of the master alloy buttons was unavoidable by the intrinsic difficulty of cutting pure Zr metal supplied to us in a ragged-rod shape of~15 to 25mm in diameter, due to the well-known fact that Zr has high ductility and high strength. We cut the source Zr metal using a "guillotine-type" shear cutter, aiming the weight of 16-17g. This resulted in roughly 23.26g of master alloy buttons after adding the other metal elements which can be measured precisely. The length variation of about 10% seen in Fig. 1 in Paper 1 can be well understood by the above explanation that the weight of the master alloy button varies in the range of about 23 to 26g.

 We had to carry out repetitive experiments of master alloy button (a few hundreds at each time) preparation and casting them for bulk glassy alloy formation due to the unfavorable success rate.

 Under these circumstances, we have to admit that the statements on the length and weight of the successfully produced bulk glassy alloy rods were made without paying careful attention. Considering the above, apparent weight discrepancies pointed out by some of the readers can be reconciled within the experimental error margin.

 We sincerely apologize that these papers did not spell out all the experimental details as precise as we should have, by the high standards of the journal, Materials Transactions, JIM.

(Received ; Accepted November 13, 2009)

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REFERENCES

1. Materials Transactions, JIM 36 (1995) 1184–1187.
2. Materials Transactions, JIM 37 (1996) 185–187.

© 2010 The Japan Institute of Metals
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