%0 Journal Article
%T 不同物相电沉积CNTs对C/SiC复合材料力学性能的影响<br>Effect of CNTs deposited at different phases on mechanical properties of C/SiC composites
%A 梅辉
%A 王扈炜
%A 丁辉
%A 张楠
%A 王月瑭
%A 白强来
%J 复合材料学报
%D 2015
%R 10.13801/j.cnki.fhclxb.20140616.002
%X 采用电沉积法与化学气相渗透(CVI)法将碳纳米管(CNTs)分别引入到碳纤维表面和SiC基体中, 制得了不同物相电沉积CNTs的C/SiC复合材料(CNTs-C)/SiC和C/(CNTs-SiC)。研究了CNTs沉积物相对C/SiC复合材料力学性能的影响, 分析了不同CNTs沉积物相的C/SiC复合材料的拉伸强度及断裂机制。结果表明: 相较于未加CNTs的C/SiC复合材料, CNTs沉积到碳纤维表面的(CNTs-C)/SiC复合材料的拉伸强度提高了67.3%, 断裂功提高了107.2%; 而将CNTs引入到SiC基体中的C/(CNTs-SiC)复合材料的断裂功有所降低, 拉伸强度也仅提高了6.9%, CNTs没有表现出明显的增强增韧效果; C/(CNTs-SiC)复合材料与传统的C/SiC复合材料有相似的断裂形貌特征, 断裂拔出机制类似, 主要为纤维增强增韧, CNTs的作用不明显。 Carbon nanotubes (CNTs) were introduced into carbon fiber surface and SiC matrix through electrodeposition and chemical vapor infiltration (CVI) method. Then the C/SiC composites (CNTs-C)/SiC and C/(CNTs-SiC) with CNTs deposited at different phases were obtained. The effects of CNTs deposition phases on the mechanical properties of C/SiC composites were investigated. The tensile strength and fracture mechanisms of C/SiC composites with CNTs deposited at different phases were studied. The results show that compared with C/SiC composite without the addition of CNTs, the tensile strength of (CNTs-C)/SiC composites with CNTs deposited on the surface of carbon fibers increases by 67.3%, and the work of fracture increases by 107.2%. However, the work of fracture of C/(CNTs-SiC) composites which introducing CNTs into the SiC matrix decreases, and the tensile strength only increases by 6.9%, the CNTs does not show significant strengthening and toughening effects. C/(CNTs-SiC) composites have the similar fracture morphology characteristics of traditional C/SiC composites, and both of them have the similar fracture and pullout mechanisms, mostly for carbon fiber strengthening and toughening, and CNTs does not play a significant role. 国家自然科学基金(51272210, 50902112); 国家级大学生创新创业训练计划(201310699014)
%K 碳纳米管
%K 电沉积
%K C/SiC
%K 复合材料
%K 微观结构
%K 力学性能&lt
%K br&gt
%K carbon nanotubes
%K electrodeposition
%K C/SiC
%K composites
%K microstructures
%K mechanical properties
%U http://fhclxb.buaa.edu.cn/CN/abstract/abstract12552.shtml