中文摘要：

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。

英文摘要：

Based on fusion bonding and atomic interdiffusion between the liquid ceramic and Ti alloy, the laminated composites of the solidified TiB2 matrix ceramic with Ti-6Al-4V alloy were prepared by reac- tion processing in high-gravity field. XRD （X-ray diffraction）, FESEM （field emmission scanning electron microscope） and EDS （energy dispersive spectrmeter） results show that intensive self-toughening mechanisms initiated by fine platelets of TiB2 primary phases in the solidified ceramic presents a excellent combination of high flexural strength and high fracture toughness of TiC-TiB2 solidified fine grain ceramic composites. Meanwhile, as a result of fusion bonding between the liquid ceramic and Ti alloy in thermal-vacuum circumstances induced by reaction processing in high-gravity field, followed by intensive atomic interdiffusion between the liquid ceramic and liquid titanium, peritectic reaction of the solidified TiB2 and liquid Ti occurs at the final stage of material solidification, followed by direct growth of TiB solids from liquid Ti and subsequent eutectic reaction of TiB solids and liquid Ti, finally, the compsoites of the solidifed ceramic with Ti alloy were prepared in multiscale （micrometer/submicrometer/micro- nanomter） and multilevel （ TiC-TiB2/TiC1-x-TiB-TiB2/TiB2-Ti-TiC1-x-TiB/TiB2-TiC1-x-TiB-Ti/TiB- TiC1-x-Ti/TiC1-x-Ti/Ti） characterized by the size and distribution of TiB phases.