标题:Fabrication and mechanical properties of SiO_2-Al_2O_3-BNNPs and SiO_2-Al_2O_3-BNNTs composites
作者:Du, M.;Bi, J.-Q.;Wang, W.-L.;Sun, X.-L.;Long, N.-N.;Bai, Y.-J.
作者机构:Key Laboratory for Liquid-Solid Structure Evolution, Processing of Materials (Ministry of Education), Shandong University, Jinan
来源:Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing
出版年:2011
页码:669-674
关键词:Al_2O_3;BNNPs;BNNTs;Mechanical properties;Microstructure;SiO_2
摘要:Hexagonal BN nanoparticles (BNNPs) and boron nitride nanotubes (BNNTs) were determined to fabricate the composites of 75wt% SiO_2-10wt% Al_2O_3-5wt% BNNPs (S-A-BNNPs) and 75wt% SiO_2-10wt% Al_2O_3-5wt% BNNTs (S-A-BNNTs) via hot pressing. Comprehensive investigations on mechanical properties of the two composites were conducted, respectively. The two composites had high flexural strength and fracture toughness. The flexural strength of S-A-BNNPs and S-A-BNNTs composites are approximately 216.1% and 279.1% higher than that of the unreinforced SiO_2, and the fracture toughness increases from 0.58MPam~(1/2) to 1.23MPam~(1/2), and to 1.39MPam~(1/2), respectively. Based upon detailed examination on microstructures, the strengthening and toughening mechanism was discussed.
资源类型:期刊论文
TOP