The effect of applied pressure on fracture surface and tensile properties of nickel coated continuous carbon fiber reinforced aluminum composites fabricated by squeeze casting
The effect of applied pressure on fracture surface and tensile properties of nickel coated continuous carbon fiber reinforced aluminum composites fabricated by squeeze casting
复制标题
DOI：
10.1016/j.matdes.2009.11.067
复制
发表时间：
2010-05-01
影响因子：
8.4
通讯作者：
Mirhabibi, A. R.
中科院分区：
文献类型：
--
作者：
Hajjari, E.;Divandari, M.;Mirhabibi, A. R.
用挤压铸造法在30、50和70 Mpa的压力下对复合材料试件进行固结。以平均体积分数约为20%的聚丙烯腈(PAN)基碳纤维为增强体，通过对复合材料的微观结构、断口形貌和拉伸性能的研究，评价了外加压力和涂层对复合材料的影响。结果表明，碳纤维表面镀镍显著提高了复合材料的拉伸强度。这似乎是由于镍层改善了复合材料的润湿性，同时也保护了纤维在加工过程中不与铝液反应的结果。制备复合样品的适宜外加压力为30 Mpa左右。较高的压力破坏了纤维的分布，也导致了镍涂层的分离。(C)2009爱思唯尔有限公司。保留所有权利。
Composite specimens were consolidated using squeeze casting method under 30, 50 and 70 MPa applied pressures. Nickel coated polyacrylonitrile (PAN) based carbon fibers with a mean volume fraction of about 20% were used as reinforcement and the effect of applied pressure and coating layer were evaluated by studying the microstructure, fracture surface and tensile properties of the composite samples. The results indicate that presence of nickel coating on the carbon fibers improves the tensile strength of the composites, significantly. This seems to be the result of the effect of nickel layer on improving the wettability and also protecting the fibers against reaction with liquid aluminum during processing the composite. The appropriate applied pressure for preparing the composite samples was achieved to be about 30 MPa. Higher pressures demonstrated damage in distribution of the fibers and also caused separation of nickel coating layer. (C) 2009 Elsevier Ltd. All rights reserved.