Abstract
Structure properties of Al-Ti-C mother alloy which was prepared by TiH2 and graphite method were studied by various characterization methods.Results demonstrated that the synthesis process of Al-Ti-C alloy contained three stages.Firstly,TiH2 and graphite was respectively used as titanium and carbon sources.Secondly,titanium reacted with aluminum and graphite,producing Ti-Al,C-Al,Ti-C compounds.Finally,these compounds formed Al-Ti-C alloy.It was equiaxed or dendrite structure with grain size of 20～40μm.There were needle-like and elongated phases in alloy matrix.There are petal primary crystals containing Ti,C,Fe and Si on grain boundaries.Ti and C distribute evenly along grain boundaries and grains.Ti and C enrichment and segregation occurred close to the primary phase.Cryolites were conducive to wetting of carbon and aluminum, the second phase generated more fully in the grain.
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