添加钛对炭/炭复合材料渗铜的影响

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。

Influence of adding Ti on molten copper infiltration into C/C composites

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.