热压烧结Fe3Al金属间化合物的微观结构与力学性能-Al2O.PDF

International Conference on Materials, Environmental and Biological Engineering (MEBE 2015) Preparation and Mechanical Properties of Carbon Nanotubes Reinforced Al O /TiC composites 2 3 Jing Li1, a , Hui Liu1,b 1Shandong Jianzhu University, Jinan, China alijing-ck@163.com, b 1083482930@ Keywords: Carbon nanotubes; Hot-pressed sintering; Mechanical properties Abstract. Carbon nanotubes reinforced Al O /TiC composites were prepared by hot-pressed 2 3 sintering in vacuum. The preparation technology and mechanical properties of Al O /TiC/CNTs 2 3 composites were investigated. The results show that the phases of the composites are Al O , TiC 2 3 and carbon nanotubes. The mechanical properties of Al O /TiC/CNTs composites are significantly 2 3 improved compared with Al O /TiC composites. The bending strength is 556.19 MPa with the 2 3 increase of 14.40%, the fracture toughness is 4.89 MPa.m1/2 with the increase of 10.63% and the hardness is HRA91.2 at the temperature of 1650 ℃for 30min with the pressure of 35MPa. The optimum content of carbon nanotubes is 1.0wt.% in this experiment. Introduction Al O -TiC composite (denoted by AT) is an important material for structural co