The effects of different holding time and temperature on the content,morphology,size and stability of the in-situ synthesis of Ti2Al2oLa phase in Al-Ti-La master alloy were studied by scanning electron microscopy,X-ray diffraction and electron probe.The results showed that the solubility of Ti2 Al20La phase gradually increased with the extension of holding time at 750 ℃,the content decreased from 20.776％to 13.72％untreated,and the morphology evolved from lumpy to round and fine flakes,and the length-to-width ratio decreased from 2.33 to 1.52,and the solubility was larger at 1 000 ℃,the content decreased to 4.5％,and the morphology evolved into sharp strips.The aspect ratio increased to 2.55,and the La-Al intermetallic compound(IMC)was formed at the grain boundary with the dissolved La atoms and Al,and the distribution density of Ti atoms in the matrix increased with the extension of holding time and the increase of holding temperature,and were uniformly distributed in the matrix in a free state.
关键词
Al-Ti-La合金/Ti2Al20La/重熔/保温时间
Key words
Al-Ti-La alloy/Ti2Al20La/remelting/holding time
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基金项目
国家自然科学基金资助项目(52161006)
甘肃省教育厅产业支持计划项目(2021CYZC-23)
有色金属产业研究院成果转化项目()
甘肃省中央引导地方科技发展资金项目(23ZYQB309)
Nonferrous Metals Industry Research Institute Achievement Transformation Project()
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