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- W54315276 abstract "The initial velocities of the oxidation of Zr at high temperatures were studied on three types of Zr: Kroll, Van Arkel and purified Van Arkel. The kinetics were followed on a thermobalance of the MacBain type. The metals were rolled to a thickness of 0.5 mm and samples were heated under vacuum to 800 deg C in order to assure the recrystallization of the metal before oxidation. The reactions were carried out in purified oxygen. The results show the effects of the metal purity and of the oxygen pressure. In order to define the kinetics and the effects of purity, a comparison was made of the oxidation of the three types of Zr at 700, 800, and 900 deg C for an O/sub 2/ pressure of 1 cm Hg and a total reaction time of 200 min. The oxidation curves obtained as a function of time show that the purer the Zr the slower the oxidation. Analysis of the curves shows that the weight increase per surface unit follows a law of the form ( DELTA m/s)/sup n/= kt, where t is time. The values of the exponent more » n and the constant k are tabulated for the different Zr purities. For pure Zr, the oxidation curve is a straight line. The velocity of the oxidation reaction passes through a maximum for an O/sub 2/ pressure of the order of 1 cm Hg. (J.S.R.) « less" @default.
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- W54315276 date "1963-05-27" @default.
- W54315276 modified "2023-09-23" @default.
- W54315276 title "KINETIC STUDY OF THE OXIDATION OF ZIRCONIUM AT HIGH TEMPERATURES" @default.
- W54315276 hasPublicationYear "1963" @default.
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