TiB2基陶瓷/Ti-6Al-4V合金梯度纳米结构复合材料组织演化与防弹性能

Microstructure Evolution and Ballistic Performance of Nano-structured Graded Composite of TiB2-based Ceramic and Ti-6Al-4V Alloy

摘要:

基于陶瓷/钛合金液态熔合与扩散原理，采用离心反应熔铸工艺成功制备出TiB2基陶瓷/Ti-6Al-4V梯度纳米结构复合材料。经14.5 mm军用制式穿甲弹DOP靶试，TiB2基陶瓷与TiB2基陶瓷/Ti-6Al-4V梯度纳米结构复合材料的平均质量效益分别为3.05和7.30，因此可认为由于陶瓷/钛合金层间生成TiB2、TiB呈空间尺度连续梯度演化的复合结构，该复合材料不仅具有高的层间解离抗力与优异的整体力学性能，而且通过层间载荷传递与多尺度（微米/微纳米/纳米）界面剪切耦合的双重效应，又在靶试中表现出高的抗弹性能。

Abstract:

Based on liquid fusion and interdiffusion between the ceramic and the titanium alloy, the laminated composites of TiB2-Based ceramic and Ti-6Al-4V alloy with the nano-structured gradient were achieved by centrifugal reactive casting processing. By conducting DOP test with 14.5mm army AP projectiles on TiB2-based ceramic and the laminated composite, the average ballistic mass effectiveness of two materials measured 3.05 and 7.30. Hence, it was considered that because the interlaminar interface developed the nano-structured gradient from the ceramic to Ti-6Al-4V alloy, the laminated composite not only presented high interlaminar cleavage resistance and high mechanical properties, but also exhibited high ballistic preformance by the dual mechanisms of interlaminar load transfer and multi-scale (micro/micro-nano/nanometer) interface shear-coupling.