THE TRANSFER OF IMPURITIES IN ZIRCONIUM PREPARED BY THE DE BOER PROCESS

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absorbed by the Zr. The N transfer can be reduced by continous pumping on the deBower bulb during depostion, thus some N can be tolerate in the feed. The presence of N in the feed is die to the difficulty fo sufficiently outgassing the feed mix and of maintaining low prexsures diring the arc melting reactions because of the large quantitiesof gases that must be handled. Laboratory iodingtion test were developed made by measuring the outgassing. the fed to the bul;b was studied by wet chemical analysis, spectrographic analysis, x-ray diffractionas well as by the conditions fo metallurgical production. A cost estimate basd on the data obtained, indicated that the costs for the new process would probably be higher than those for the Kroll process. (auth) 11l60 The effect of adding 0.1 to 0.2% oxygen on phase relationships in the Zr-Fe-Sn system in a limited range of dilute alloys was studied. lron content ranged from 0 to l% nd tin conteni from U to 2%. ln order to maintain alloy puritys

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