Yuan Q.,Jiangxi Engineering Institute |
Yuan Q.,Nanchang University |
Zou S.,Jiangxi Engineering Institute |
Xiong J.,Jiangxi Engineering Institute |
And 3 more authors.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys
Carbon nanotubes coated MgO reinforced AZ91D composites were fabricated by powder technique combined with hot extrusion process. The mechanical properties of the composites prepared were tested, and effects of MgO-CNTs on the mechanical properties of the AZ91D alloy composites were analyzed, and the fractograph was observed and analysed by scanning electron microscope. The results reveal that the MgO coated CNTs can strengthen mechanical properties of the composites effectively. When the addition of MgO-CNTs is 3.0% the tensile strength, elongation and microhardness of the composites reach 256.7 MPa, 12.75% and 130.86HV, respectively, increased by 41.44%, 41.67% and 22.4%, respectively, compare to those of the AZ91D alloy. However, with the excessive addition of MgO-CNTs, the MgO-CNTs will be cool, resulting in decrease of mechanical properties. ©, 2014, Journal Office of Special Casting and Nonferrous Alloys. All right reserved. Source