日本金属学会誌

J. Japan Inst. Metals, Vol. 27, No. 5 (1963),
pp. 212-216

Studies on High Temperature Oxidation and Mechanical Properties of Zr-Al and Zr-Mo Base Ternary Alloys

Shigeo Aoki1

1Central Research Lab., The Furukawa Electric Co. Ltd., Tokyo

Abstract:

The high temperature oxidation and the mechanical properties of Zr-base ternary alloys shown below have been investigated.

Zr-0.5%Al-1.5%Fe, Zr-1.0%Mo-1.0%Fe
Zr-0.5%Al-1.5%Cr, Zr-1.0%Mo-1.0%Cr
Zr-0.5%Al-1.5%Ni, Zr-1.0%Mo-1.0%Ni

The oxidation was carried out in dry air at the temperature range of 500°∼ 700°C. The mechanical properties were measured at the temperature from R.T. to 600°C. The results obtained were summarized as follows: (1) The rates of the oxidation of alloys containing Al are very high and the exponent n in the oxidation process is nearly 1. The reactions follow a liner rate law. (2) In cases of alloys containing Mo, these rates are low and the exponent n is approximately 3, so that the cubic rate law may be applied. (3) The oxidation resistance of Zircaloy-2 in air is not so good. The exponent n is nearly 1 except in the initial period of the oxidation at 500°C. (4) The mechanical strength of alloys containing Al are stronger than these of alloys containing Mo. The strength of Zircaloy-2 at the elevated temperature is the lowest.


(Received 1963/1/19)

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