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The Microstructure and Solidification Mechanism of Al-Ti-C-Ce Prepared by Petroleum Coke
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Xinjiang University

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    Abstract:

    The microstructure of an Al-Ti-C-Ce alloy was studied by XRD,SEM,and EDS. This mother alloy consisted of α(Al),(AlTi),(TiC),and (Ti2Al20Ce) phases,and there was a second phase of a composite structure in the alloy.The TiC phase was the primary crystal nucleus,and the (TiAl) phase was segregated on the surface of TiC phase to form a TiC-(TiAl) composite crystal nucleus. Al formed a fine TiC-(TiAl)-α(Al) primary composite crystal nucleus by a peritectic reaction.The primary composite crystal nucleus with higher energy and larger cluster size was taken as the core,and other composite crystal nuclei were segregated on its surface to form a secondary composite crystal nucleus.Next,the secondary composite crystal nucleus formed the tertiary composite crystal nucleus,and so on,to form the titanium-enriched area of composite particles.

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[heyongdong, zhouxinfeng, helei, douyinli, zhangqingyuan. The Microstructure and Solidification Mechanism of Al-Ti-C-Ce Prepared by Petroleum Coke[J]. Rare Metal Materials and Engineering,2019,48(9):2965~2971.]
DOI:10.12442/j. issn.1002-185X.20180418

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History
  • Received:April 24,2018
  • Revised:April 28,2018
  • Adopted:May 21,2018
  • Online: October 09,2019
  • Published: