Hou Chenyang, Zhang Shouyin, Ma Zhijian, Lu Baiping, Wang Zhenjun
School of Aeronautic Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China.
Materials (Basel). 2021 Mar 10;14(6):1323. doi: 10.3390/ma14061323.
Ti/Ti-Al and SiC-reinforced Ti/Ti-Al laminated composites were fabricated through vacuum hot-pressure using pure Ti foils, pure Al foils and SiC fibers as raw materials. The effects of SiC fiber and a laminated structure on the properties of Ti-Al laminated composites were studied. A novel method of fiber weaving was implemented to arrange the SiC fibers, which can guarantee the equal spacing of the fibers without introducing other elements. Results showed that with a higher exerted pressure, a more compact structure with fewer Kirkendall holes can be obtained in SiC-reinforced Ti/Ti-Al laminated composites. The tensile strength along the longitudinal direction of fibers was about 400 ± 10 MPa, which was 60% higher compared with the fabricated Ti/Ti-Al laminated composites with the same volume fraction (60%) of the Ti layer. An in situ tensile test was adopted to observe the deformation behavior and fracture mechanisms of the SiC-reinforced Ti/Ti-Al laminated composites. Results showed that microcracks first occurred in the Ti-Al intermetallic layer.
以纯钛箔、纯铝箔和碳化硅纤维为原料，通过真空热压法制备了钛/钛铝和碳化硅增强钛/钛铝层状复合材料。研究了碳化硅纤维和层状结构对钛铝层状复合材料性能的影响。采用一种新颖的纤维编织方法来排列碳化硅纤维，该方法可以保证纤维等间距排列且不引入其他元素。结果表明，在碳化硅增强钛/钛铝层状复合材料中，施加更高的压力可获得结构更致密、柯肯达尔孔洞更少的材料。沿纤维纵向的拉伸强度约为400±10兆帕，与相同体积分数（60%）钛层的制备钛/钛铝层状复合材料相比，提高了60%。采用原位拉伸试验观察了碳化硅增强钛/钛铝层状复合材料的变形行为和断裂机制。结果表明，微裂纹首先出现在钛铝金属间化合物层中。
