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以1Cr18Ni9Ti、Ti-6Al-4V为金属基底,通过在B4C+Ti体系中引入CrO_3+Al铝热剂,调整反应体系绝热温度依次为3 193、3 282、3 290及3 473K,采用超重力场反应连接制备TiB_2-TiC/1Cr18Ni9Ti和TiB_2-TiC/Ti-6Al-4V梯度复合材料,发现随着反应绝热温度升高,陶瓷/金属界面区厚度不仅因金属熔深增加而增大,并且残存于界面上的Al_2O_3夹杂也随之增多。分别对B4C+Al体系与CrO_3+Al铝热剂进行配制、球磨活化、压制成坯并依次填料入坩埚后,发现残存于界面上的Al_2O_3夹杂完全消除,同时发现在TiB_2-TiC/1Cr18Ni9Ti界面上生成三维网络陶瓷/金属梯度复合结构,而在TiB_2-TiC/Ti-6Al-4V界面上形成跨尺度多层次梯度复合结构。
Adopting CrO_3 + Al thermite into B4C + Ti system, the adiabatic temperature of the system was adjusted to 3 193,3 282,3 290 and 3 473K in order of 1Cr18Ni9Ti and Ti-6Al-4V. The TiB_2-TiC / 1Cr18Ni9Ti and TiB_2-TiC / Ti-6Al-4V gradient composites were prepared by reaction reaction. It was found that with the increase of the adiabatic temperature, the thickness of the ceramic / metal interface not only increases due to the increase of the metal penetration, The inclusion of Al 2 O 3 in the interface also increases. The B4C + Al system and CrO3 + Al thermite were prepared, ball-activated, pressed into billet and then packed into the crucible, and found that the residual Al_2O_3 inclusions in the interface completely disappear, and found in the interface TiB_2-TiC / 1Cr18Ni9Ti Dimensional three-dimensional network of ceramic / metal gradient composite structure, and formed in the TiB_2-TiC / Ti-6Al-4V interface multi-scale gradient multi-scale composite structure.