CAJ | 학술논문

采用SEM、EDS和DSC等方法研究稀土氧化物对采用氟盐法制备Al-Ti-C-RE的热力学影响。结果表明：Al与K2TiF6发生铝热放热反应生成TiA13及部分游离态[Ti]，在铝热反应的作用下，稀土氧化物Ce2O3与C发生碳热反应，生成大量的CeC2，该相与游离态[Ti]易反应生成TiC和原子态[Ce]，反应生成的[Ce]为表面活性元素，吸附在TiA13相上形成Al2Ti20Ce。DSC分析结果表明，添加稀土氧化物Ce2O3可在1120℃左右自发产生碳热反应。因此，在铝热反应的基础上，利用稀土氧化物与石墨粉之间的碳热反应，不仅可以降低制备Al-Ti-C-RE细化剂的反应温度，同时还可提高C与铝熔体的润湿性，促进TiC粒子的生成。
채용SEM、EDS화DSC등방법연구희토양화물대채용불염법제비Al-Ti-C-RE적열역학영향。결과표명：Al여K2TiF6발생려열방열반응생성TiA13급부분유리태[Ti]，재려열반응적작용하，희토양화물Ce2O3여C발생탄열반응，생성대량적CeC2，해상여유리태[Ti]역반응생성TiC화원자태[Ce]，반응생성적[Ce]위표면활성원소，흡부재TiA13상상형성Al2Ti20Ce。DSC분석결과표명，첨가희토양화물Ce2O3가재1120℃좌우자발산생탄열반응。인차，재려열반응적기출상，이용희토양화물여석묵분지간적탄열반응，불부가이강저제비Al-Ti-C-RE세화제적반응온도，동시환가제고C여려용체적윤습성，촉진TiC입자적생성。
The effects of the rare earth oxide on the thermodynamics of Al-Ti-C-RE master alloy prepared by mixing the potassium titanium fluoride and carbon into aluminum melt were studied by means of SEM, EDS and DSC. The results show that the aluminothermy reaction of the Al melt and K2TiF6 occurs to produce the TiA13 and [Ti] atoms. Then, based on the aluminothermy reaction, the rare earth oxide Ce2O3 reacts with carbon to produce the carbothermy reaction and abundant CeC2 phases form, which react with [Ti] atoms easily to produce the TiC particles and [Ce] atoms. The reacted [Ce] atom is a kind of surface active elements, and easily adsorbs on the TiA13 phases to form the new rare earth compounds Al2Ti20Ce. The DSC analysis results show that the rare earth oxide Ce2O3 has spontaneous carbo-thermal reaction at 1 120℃, which decreases the reacting temperature to manufacture Al-Ti-C-RE master alloys, improves the wettability between carbon and aluminum melts and promotes the formation of TiC particles.