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采用熔盐电解法由混合氧化物成功制备出了低成本Ti12LC合金,并对脱氧过程机理进行分析。结果显示:脱氧反应过程首先生成CaTiO3、低价氧化物Ti6O、Ti2O和Ca2Al2O5;其次随脱氧时间的进行钛的低价氧化物含量逐步增加,再其次出现金属钼,最后生成Ti12LC合金相。由于MoO2的理论电压低于TiO2、Al2O3,因此钼优先还原,且钼在-Ti中能固溶,所以最终钼是以固溶体形式存在于钛中,而Fe2O3虽然理论分解电位更低,但由于含量低,而没有检测到铁的单质还原。通过对电解产物表面的背散射电子像分析,发现电解制备出的产物其形貌和Ti12LC合金的组织相似。
The low cost Ti12LC alloy was successfully prepared from mixed oxides by molten salt electrolysis and the mechanism of deoxidation was analyzed. The results show that CaTiO3, subthreshold oxides Ti6O, Ti2O and Ca2Al2O5 are formed firstly in the deoxidation reaction; secondly, the content of titanium suboxide is gradually increased with the deoxidation time, and then the metal molybdenum appears again, finally the Ti12LC alloy phase is formed. Since the theoretical voltage of MoO2 is lower than that of TiO2 and Al2O3, molybdenum is preferentially reduced and molybdenum is capable of solid solution in -Ti. Therefore, the final molybdenum exists as a solid solution in titanium and the theoretical decomposition potential of Fe2O3 is lower. However, Low, but no single elemental reduction of iron was detected. By the backscattered electron image analysis of the surface of the electrolysis products, it was found that the morphology of the product prepared by electrolysis was similar to that of Ti12LC alloy.