采用箔-纤维-箔(FFF)法分别制备无涂层、C涂层和Cu/Mo双涂层改性的SiCf/Ti6Al4V复合材料,对制备态复合材料的力学性能和界面微观组织进行对比分析,进一步研究不同真空热暴露处理对Cu/Mo双涂层改性复合材料的界面微区的影响规律。结果表明,制备态下Cu/Mo涂层比C涂层较好地改善了复合材料的界面组织和性能,且对基体和纤维中元素扩散均具有一定的阻挡作用;求得900℃下SiCf/Cu/Mo/Ti6Al4V界面反应的生长动力学公式为H=1.380t1/2+5.397。
Foil-Fiber-Foil(FFF) method was used to prepare Ti6Al4V-matrix composites reinforced by SiC fibers without coating,with C coating and Cu/Mo duplex coatings,respectively.The mechanical properties as well as interfacial microstructure of the as-prepared composites were compared.Moreover,the interfacial reaction characteristics of the SiCf/Cu/Mo/Ti6Al4V composites were also investigated by different vacuum heat treatments.The results show that for as-prepared samples,Cu/Mo coating is better than C-coating to improve the interfacial microstructure and properties of titanium matrix composites;the growth kinetic expression of the SiCf/Cu/Mo/Ti6Al4V interfacial reaction at 900 ℃ is H=1.380t1/2+5.397.