浸渗-反应合成Cf/Ti-Al复合材料的反应机理

Reaction Mechanism of Cf/Ti-Al Composite by Infiltration-Reaction Synthesis

摘要:

以Ti粉、纯Al和碳纤维为原料，采用浸渗-反应合成法研制了Cf/Ti-Al复合材料，根据DSC测试结果确定反应合成温度。结果表明：在后期加热过程中，随着反应温度的升高，TiAl3的含量先增多后减少，碳纤维与Al的界面反应逐渐增强，Al4C3和TiC逐渐增多，在高温阶段，氧参与反应，复合材料中有Al2O3生成。通过SEM和XRD测试分析了复合材料内部的显微组织及相组成，同时探讨了Cf/Ti-Al复合材料中各物相形成过程的反应机理

Abstract:

Carbon fiber reinforced Ti-Al composite was fabricated through infiltration-reaction sythesis process, using Ti powder, Al and carbon fiber as starting materials. The results show that the interface reaction between carbon fiber and Al intensified gradually, the content of TiAl3 increased firstly and then decreased, and Al4C3 and TiC increased with increasing of temperature. Forming of Al2O3 took place in the composite owing to oxygen participating in high temperature stage. The microstructure and phases composition were analyzed by SEM and XRD, and reaction mechanism of the synthesis process among the components of carbon fiber reinforced Ti-Al composite was investigated