用化学气相渗透(CVI)工艺,控制反应气体的流动方向制备出陶瓷相呈梯度分布的多层Si C/Ta C陶瓷复合界面改性C/C复合材料。结果表明,沿着C/C复合材料厚度方向Si C/Ta C陶瓷相的含量迅速减少,界面厚度下降,界面结构则从多层Si C/Ta C层状界面(I区)转变为团簇状Si C/Ta C陶瓷复相界面(II区)和单层Ta C陶瓷界面(III区)。在I区,多层Si C/Ta C陶瓷复合界面由Si C层(i层)、Ta C层(ii层)、镶嵌有Si C颗粒的Ta C复相层(iii层)、镶嵌有Ta C相的Si C复相层(iv层)以及Ta C层(v层)等五个子界面层组成。在II区,陶瓷相不再以层状形式包覆,而是呈团簇状生长在炭纤维表面。本文还探讨了多层Si C/Ta C陶瓷复合界面的纳米压痕硬度和杨氏模量的分布。 A multi-layer Si C / Ta C ceramic composite interface-modified C / C composite with a gradient distribution of ceramic phases was prepared by chemical vapor infiltration (CVI) process and controlled reaction gas flow direction. The results show that the content of Si C / Ta C ceramic phase decreases rapidly along the thickness of C / C composites and the interface thickness decreases, and the interface structure changes from the multilayered Si C / Ta C layered interface (region I) to the cluster Like Si C / Ta C ceramic composite phase (region II) and monolayer Ta C ceramic interface (region III). In Region I, the multilayer Si C / Ta C ceramic composite interface is composed of Si C layer (i layer), Ta C layer (ii layer), Ta C complex phase layer (iii layer) C phase Si C complex phase layer (iv layer) and Ta C layer (v layer) five sub-interface layer composition. In Zone II, the ceramic phase is no longer coated in the form of layers, but instead grows in clusters on the surface of the carbon fibers. The article also discusses the distribution of nanoindentation hardness and Young’s modulus of multi-layer Si C / Ta C ceramic composite interface.