(中南大学 粉末冶金国家重点实验室， 长沙 410083)
摘 要: 通过铺展实验和渗透实验考查添加钛对铜与C/C复合材料润湿性能的影响。 采用真空熔渗的方法成功地将铜合金液渗入到C/C复合材料坯体中。 对渗铜后形成的C/C-Cu复合材料进行X射线衍射、 金相和扫描电镜分析。 结果表明， 加入12%～16％(质量分数)的钛元素粉末使铜在C/C复合材料表面有好的铺展性能； 含钛铜合金渗入到C/C复合材料中有TiC形成。 添加钛元素能改善C/C复合材料渗铜性能的主要原因是改善铜在C/C复合材料中的化学吸附和物理吸附特性； 通过毛细管力作用， 合金液渗入到C/C复合材料坯体中。
关键字: C/C复合材料； 熔渗； 铜； 钛； 润湿性
（State Key Laboratory of Powder Metallurgy, Central South University,
Changsha 410083, China）
Abstract: The influence of adding titanium on the wettability of molten copper on the surface of C/C composites preform was investigated by spreading and infiltrating experiment. Copper infiltrated into the preform successfully， and C/C-Cu composites were prepared by the molten infiltration. The composites were analysed by X-ray diffraction(XRD), optical microscope(OM), scanning electronic microscope(SEM). The results show that copper added 12%-16% (mass fraction) titanium possesses good wettability on the surface of C/C composites preform; the molten copper alloy containing titanium infiltrates into the preform, and TiC phase forms in the C/C-Cu composites. The improvement of adding titanium for molten copper infiltration into the C/C composites preform results from the improvement of the chemical and physical adsorption characteristic of copper on the composites. The liquid copper alloy infiltrates into the preform under the capillary pressure.
Key words: C/C composites; infiltration; Cu; Ti; wettability
