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

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.

• Periodical: Materials Science Forum (Volume 960)
• Pages: 14-20
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.960.14
• Online since: June 2019
• Authors: Xin Feng Zhou, Yong Dong He*, Yuan Qing Zhang, Dong Liang Ma
• Keywords: Al-Ti-C-Ce, Composite Particle, Microstructure, Solidification Mechanism

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