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采用超重力场反应加工技术,通过陶瓷-钛合金之间熔化连接与原子互扩散,成功制备出TiB2基凝固陶瓷-Ti-6Al-4V层状复合材料。经XRD、FESEM及EDS分析发现,正是作为陶瓷基体相的TiB2片晶(或板晶)可诱发强烈的自增韧机制,使TiC-TiB2细晶凝固陶瓷具有高的弯曲强度与断裂韧度,并且是在超重力场反应加工引发的热真空环境下钛合金与液态陶瓷的熔化连接与原子互扩散,进而在凝固后期诱发TiB2与Ti液的包晶反应、TiB自钛液的析晶反应及TiB与钛液的共晶反应,最终实现以TiB尺寸、分布为特征的陶瓷-钛合金多尺度(微米-亚微米-微纳米)多层次(TiC/TiB2-TiC1-x/TiB/TiB2-TiB2/Ti/TiC1-x/TiB-TiB2/TiC1-x/TiB/Ti-TiB/TiC1-x/Ti-TiC1-x/Ti-Ti)复合。
TiB2-based solidified ceramics-Ti-6Al-4V layered composites have been successfully prepared by melt-bonding and atom-to-atom diffusion between ceramic and titanium alloy by using super gravity field reaction processing technology. The XRD, FESEM and EDS analysis showed that TiB2 lamellae (or platelet) as the ceramic matrix phase can induce strong self-toughening mechanism and make TiC-TiB2 fine-grained solidified ceramics have high flexural strength and fracture toughness , And it is the fusion connection and atomic diffusion between the titanium alloy and the liquid ceramic in the thermal vacuum environment induced by the super gravity field reaction, and further induces the peritectic reaction of TiB2 and Ti liquid in the late stage of solidification. The crystallization reaction of TiB from the titanium liquid TiB / TiB2 / TiB2-TiC1-x / TiB2 / TiB2 / TiB2 / TiB2 / TiB2 / TiB2 / Ti / TiC1-x / TiB-TiB2 / TiC1-x / TiB / Ti-TiB / TiC1-x / Ti-TiC1-x / Ti-Ti).