采用非自耗电弧熔炼制备含不同微合金元素的10vol%TiC/Ti-6Al-4V复合材料,研究不同的微量合金元素对复合材料中TiC形态的影响.结果表明,原始铸态复合材料中TiC形态主要是粗大且发达的枝晶状.而基体中加入0.3%(质量分数,下同)的Sn元素后,TiC生长被抑制,TiC形态变为细小分散的颗粒状;0.3%的Ni被加入后,增大了TiC的结晶区间,使TiC枝晶生长变得更加发达;而0.3%的Nb元素的加入,则减小了TiC的结晶区间,从而减少了初晶TiC数量,促进了共晶TiC的形成.
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