Abstract: Electrolytic chromium purified in hydrogen and lanthanum metal (99%) were fused in an electric arc furnace in an atmosphere of helium to prepare alloys with up to 30% lanthanum. The average loss of lanthanum during fusion was less than 25% of the lanthanum introduced. Annealing of the alloys at 1200 tained C for 100 hours led to a growth of grain size of chromium. The saturation solubility of lanthanum in solid chromium did not exceed 1.5 wt.% lanthanum after annealing. The 10, 15, 20, and 30 wt.% lanthanum alloys showed that immiscibility and segregation was taking place. Solubility determinations were made by quenching samples from various temperatures. Thermal analyses showed that the alpha + /sub 2/ were ob ore resistant t + transformation took place at 705 tained C. The melting point of the second phase, rich in lanthanum, was found to be 865 + 5 tained C. No intermetallic compounds of lanthanum and chromium could be found. (TTT)
Publication Year: 1960
Publication Date: 1960-03-01
Language: en
Type: article
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Cited By Count: 2
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