三维网络氧化铝钢复合材料的制备及性能.PDFVIP

第 44卷第 3期 201 6 年 3 月 硅 酸 盐 学 报 Vol. 44，No. 3 March，2016JOURNALOF THE CHINESE CERAMIC SOCIETY DOI：10.14062/j.issn.0454-5648.2016.03.11 三维网络氧化铝/钢复合材料的制备及性能 桑可正，雒 融，和 琳，李红伟 (长安大学材料科学与工程学院，西安 710054) 摘 要：采用真空消失模铸造技术，将钢液浸渗到表面化学气相沉积了金属镍涂层的氧化铝泡沫陶瓷中，制备三维网络氧化 铝/钢复合材料。研究复合材料的结构、抗弯强度及磨粒磨损性能。结果表明，镍涂层可使钢液有效浸渗到陶瓷骨架中，成功 制备出界面结合良好的三维网络氧化铝/钢复合材料。复合材料中陶瓷/钢界面为非反应型界面，断裂过程中，裂纹沿界面扩 展，复合材料的抗弯强度随陶瓷相体积分数的增加而降低。复合材料的磨损机制为以钢被切削、陶瓷断裂–脱落为特征。随 陶瓷相体积分数的增加，复合材料的体积磨损量降低。 关键词：氧化铝/钢；复合材料；抗弯强度；磨粒磨损 中图分类号：TB333 文献标志码：A 文章编号：0454–5648(2016)03–0414–05 网络出版时间： 网络出版地址： Preparation and Properties of Three-dimensional interpenetrating Al2O3/Steel Composites SANG Kezheng, LUO Rong, HE Lin, LI Hongwei (School of Material Science and Engineering, Chang′an University, Xi′an 710064, China) Abstract: To prepare three-dimensional network Al2O3/steel composite, a layer of metal nickel was firstly coated on an alumina foam via chemical vapor deposition and then the molten steel was infiltrated into the foam by an expendable casting process. The microstructure, bending strength and abrasive wear of the composite obtained were investigated. The results show that three-dimensional network Al2O3/steel composite with a good combined interface was prepared because the molten steel effectively infiltrates into the ceramic foam due to the nickel coating. The interface between the ceramic/steel in the composites is a non-reaction interface. The cracks propagate along the interface during the fracture process, and the bending strength of the composite decreases with the increase of the volume fraction of the ceramic phase. The wear mechanism of the composite has the feature of steel phase due to cutting and ceramic phase due to fracture-break off. The wear volume of the composite decreases with the increase of the volume fraction of the ceramic phase. Keywords: alumina/steel; composite; bending strength; abrasive wear 三维网络陶瓷–金属复合材料(three-dimensional network ceramic–metal composites，3DNCMC)因其 特有的三维网络结构及广阔的应用前景，得到了研 究者的广泛关注[1–