众所周知,向铝及其合金的熔体中添加钛后,通过包晶反应产生初晶TiAl_3相,使Al成核,从而使铸锭的晶粒得到α细化。然而,由于晶粒细化剂通常是以远低于包晶成分的钛浓度添加的,已有各种不同理论解释在这种情况下铸锭晶粒的细化。Cibula对沉淀相进行X射线衍射试验后,报道了TiC的存在,该沉淀相是对Al—Ti熔体进行离心处理而分离出的。在上述实验结果的基础上,并根据结晶学,Cibula建立了碳化 It is well known that after the addition of titanium to the melt of aluminum and its alloys, a primary TiAl 3 phase is produced by peritectic reaction to nucleate Al, thereby making the ingot grains α-refined. However, since grain refiners are generally added at titanium concentrations much lower than the peritectic composition, various different theories have been applied to explain the refinement of the ingot grains in this case. Cibula reported the presence of TiC after X-ray diffraction of the precipitated phase, which was isolated by centrifugation of the Al-Ti melt. Based on the above experimental results and based on crystallography, Cibula established a carbonization